Cabinet Regulation No. 325 of 2007 on Labour Protection Requirements when Coming in Contact with Chemical Substances at Workplaces

Translation © 2019 Valsts valodas centrs (State Language Centre) Text consolidated by Valsts valodas centrs (State Language Centre) with amending regulations of: 1 February 2011 [shall come into force from 4 February 2011]; 7 April 2015 [shall come into force from 1 June 2015]; 10 July 2018 [shall come into force from 13 July 2018]. If a whole or part of a paragraph has been amended, the date of the amending regulation appears in square brackets at the end of the paragraph. If a whole paragraph or sub-paragraph has been deleted, the date of the deletion appears in square brackets beside the deleted paragraph or sub-paragraph. Republic of Latvia Cabinet Regulation No. 325 Adopted 15 May 2007 Labour Protection Requirements when Coming in Contact with Chemical Substances at Workplaces Issued pursuant to Section 25, Clause 11 of the Labour Protection Law and Section 16 of the Chemical Substances Law [1 February 2011] I. General Provisions 1. This Regulation prescribes labour protection requirements for employees when coming in contact with chemical substances (including mixtures) at workplaces if a risk is caused or may be caused from the effect of chemical substances present in the work environment or related to the working process, as well as special restrictions and prohibitions in relation to individual dangerous chemical substances or mixtures. [1 February 2011] 2. This Regulation applies to workplaces where an employee is or may be exposed to the effect of such chemical substances and mixtures: 2.1. which conforms to the criteria laid down in Annex 1 to Regulation (EC) No 1272/2008 of the European Parliament and of the Council of 16 December 2008 on classification, labelling and packaging of substances and mixtures, amending and repealing Directives 67/548/EEC and 1999/45/EC, and amending Regulation (EC) No 1907/2006 (hereinafter – Regulation No 1272/2008) for classification of substances in any of physical or health hazard classes irrespective of whether this chemical substance is classified in accordance with Regulation No 1272/2008; 2.2. which are present in the working environment or utilised at work and due to the physical, chemical and toxic properties thereof endanger the safety and health of an employee; 2.3. to which an occupational exposure limit value (OEV) has been determined – such concentration of chemical substances or mixtures in the air of the work environment which for the whole duration of the life of an employee does not cause the contraction of a disease or deterioration of health which can be determined by modern investigative methods if the Translation © 2019 Valsts valodas centrs (State Language Centre) 2 relevant chemical substances and mixtures affect an employee not longer than 8 hours during a working day or not longer than 40 hours a week (Annex 1, 2); and 2.4. to which a biological limit value (BLV) has been determined – indicators of concentration of chemical substances and metabolites thereof received by the organism of the employee and the biological effects caused by chemical substances in the biological environment of the employee, which values shall be determined for healthy employees who are exposed to chemical substances and mixtures on the level of the occupational exposure limit value (OEV) (Annex 3). [1 February 2011; 7 April 2015] 3. The occupational exposure limit value (OEV) for a chemical substance shall be determined taking into account physico-chemical properties, toxicity, epidemiological researches in the field of non-infectious diseases and conditions for technological process, as well as evaluating the data regarding chemical substances with a similar structure. The occupational exposure limit value (OEV) of a chemical substance shall be used for evaluation of chemical risk on the working environment (concentration of the chemical substance in the air of the working environment shall be compared with the occupational exposure limit value (OEV)). 4. The occupational exposure limit value (OEV) shall be defined as an average arithmetical value for a working day of 8 hours (average shift concentration) or as a value for a short period of time (up to 15 min., for fibrogenic substances – up to 30 min.). The occupational exposure limit value (OEV) shall be measured at a temperature of 20 oC at a pressure of 101.3 kPa and expressed in milligrams per cubic meter (mg/m3), but the concentration of gases and vapour may be expressed also in measurement units not dependent on the temperature and pressure – ppm (ml/m3), which is a millionth of the capacity. 5. The Ministry of Welfare shall, in co-operation with the relevant standards technical committee, recommend to the State limited liability company “Standardisation, Accreditation and Metrology Centre” a list of standards to be drawn up, adapted and applied in relation to this Regulation. [17 April 2015] 6. The State limited liability company “Standardisation, Accreditation and Metrology Centre” shall publish on its official web page a list of those Latvian national standards applied to ensure the conformity with the requirements laid down in this Regulation (hereinafter – the applicable standards). [7 April 2015] 7. The employer shall be liable for compliance with this Regulation. 8. Compliance with this Regulation shall be controlled by the State Labour Inspectorate and other authorities in accordance with the competence specified thereto by the Chemical Substances Law. [1 February 2011] II Determination and Assessment of Risk 9. The employer shall ensure the assessment of the risk caused by chemical substances and mixtures in conformity with the procedures for the internal supervision of the work environment and the procedures for the risk assessment in the work environment of an undertaking involving trusted representatives and employees. [1 February 2011] Translation © 2019 Valsts valodas centrs (State Language Centre) 3 10. To determine the concentration of chemical substances in the air of the work environment, the employer shall, upon request of the control authorities referred to in Paragraph 8 of this Regulation, involve the laboratory accredited in the national accreditation body in accordance with the laws and regulations regarding the assessment, accreditation, and surveillance of conformity assessment bodies, or in an accreditation body of another European Union Member State or European Economic Area State which performs the conformity assessment of laboratories in specification of the concentration of chemical substances in the air of the work environment. [7 April 2015] 11. The employer shall determine workplaces and work processes where chemical substances and mixtures cause or may cause a risk to the safety and health of employees, and assess the risk thereof, taking into account: 11.1. information in the safety data sheets of the chemical substances and mixtures received from a supplier or importer; 11.2. results of the health examination of employees; 11.3. results and prognoses of preventative measures taken or to be taken; 11.4. other information regarding the dangerousness of the chemical substances and mixtures; 11.5. the occupational exposure limit value (OEV) of chemical substances in the air of the work environment; 11.6. the biological limit values (BLV) of chemical substances and mixtures; 11.7. particular work conditions and processes at a workplace and in a room (including at adjacent workplaces), as well as dangerous properties of chemical substances and mixtures present in the work environment due to which the risk is caused or increased to the health and safety of employees in the relevant work conditions and in emergency situations; 11.8. the occupational exposure concentration of chemical substances in the air of the work environment, which is specified as 8 hours or temporary occupational exposure concentration (one or both of these values), as well as the type and duration of the effect of substances; 11.9. the amount of chemical substances and mixtures at the workplace; 11.10. risk of potential accidents which is related to the use of chemical substances and mixtures at work and the physico-chemical properties thereof: 11.10.1. if there are binding regulatory enactments regarding the procedures for the industrial accident risk assessment and risk reduction measures for the undertaking, then, in carrying out the procedures specified therein, also the requirements specified in this Regulation shall be taken into account; or 11.10.2. if there are no binding regulatory enactments regarding the procedures for the industrial accident risk assessment and risk reduction measures for the undertaking, the accident risk reduction measures shall be determined by this Regulation; and 11.11. the results of other risk assessments (for example, the risk assessment of a new chemical substance or risk assessment of an accident). [1 February 2011] 12. Risk shall be assessed regularly once a year, as well as in cases when: 12.1. significant changes have occurred in the work environment (for example, changes in the composition, physical state or raw materials of a preparation); 12.2. new activities have been introduced or the production process has been modified (for example, work equipment, technological and control process); 12.3. the results of inspections in the work environment indicate the possible risk of the effect of chemical substances on employees, it is specified in measurements, that the Translation © 2019 Valsts valodas centrs (State Language Centre) 4 occupational exposure limit value (OEV) has been exceeded or deficiencies of the technological process, equipment or technical methods have been determined; 12.4. an emergency situation has occurred which has caused or precipitated an accident, fire, explosion or release of dangerous chemical substances and mixtures; 12.5. an acute case of occupational poisoning or an occupational disease caused by a chemical risk factor has been confirmed; or 12.6. new information regarding the harmfulness of the relevant chemical substance and mixture to the health of employees, information regarding the possibility of fire or explosion, as well as regarding the possibility of the release of dangerous chemical substances or dangerous mixtures. [1 February 2011] 13. In the cases referred to in Paragraph 12 of this Regulation, the employer shall assess the risk caused by changes and take the necessary preventative measures before assigning employees to work. 14. The maintenance of equipment and other activities, during which the safety and health of employees may be endangered and employees may be exposed to the effects of the chemical substances and mixtures referred to in Paragraph 2 of this Regulation, shall also be taken into account in the risk assessment. [1 February 2011] 15. The employer shall ensure that the concentration of chemical substances in the air of the work environment is regularly determined and compared with the occupational exposure limit value (OEV), and in accordance with economic and technical capabilities the employer shall take measures for the reduction of the actual values of occupational exposure. The employer shall determine the exposure of chemical substances in the air of the work environment and assess it in accordance with the methodology specified in Annex 4 to this Regulation. 16. If the applicable standards have been observed in the exposure assessment of inhalable chemical substances and mixtures, it is considered that the requirements for the exposure assessment of inhalable chemical substances and mixtures at the workplace are observed. [1 February 2011] 17. Periodicity for concentration measurements of a chemical substance shall be determined in accordance with the exposure index of the chemical substance, which is obtained by dividing the concentration of the chemical substance (occupational exposure concentration) in the working environment by the occupational exposure limit value (OEV): C EI = ———, where AER EI – the exposure index of the chemical substance; C – the concentration of the chemical substance (occupational exposure concentration) in the air of the working environment. 18. If, in determining the concentration of a chemical substance during one working day or one shift, the exposure index of the chemical substance is more than 1 (EI > 1), the exposure in the air of the working environment is larger than the occupational exposure limit value (OEV). This causes a risk to the safety and health of an employee and the employer shall immediately perform measures for risk elimination. After implementation of the referred to Translation © 2019 Valsts valodas centrs (State Language Centre) 5 measures the employer shall perform repeated measurements of the concentration of the chemical substance in order to ascertain the efficiency of the measures performed and the reduction of risk up to an admissible level. [1 February 2011] 19. If in determining the concentration of a chemical substance during one working day or one shift the exposure index of the chemical substance is equal to 0.1 or less (EI ≤ 0,1), the exposure of the chemical substance in the air of the working environment is equal to 1/10 of the occupation exposure limit value (OEV) or less. If it is possible to prove that these levels are characteristic for the working environment in long term, periodical measurements shall be optional. 20. The time interval for the next periodical measurement shall be determined in accordance with the result obtained in the previous measurements. The maximum time interval up to the next periodical measurement shall be: 20.1. 104 weeks, if EI ≤ 0.5 in the previous measurements (occupational exposure concentration is less than a half of the occupational exposure limit value (OEV)); 20.2. 52 weeks, if 0.5 < EI ≤ 0.75 in the previous measurements (occupational exposure concentration is between a half and 3/4 of the occupational exposure limit value (OEV)); or 20.3. 24 weeks, if 0.75 < EI ≤ 1 in the previous measurements (occupational exposure concentration is more than 3/4 or 75% of the occupational exposure limit value (OEV)). [1 February 2011] 21. Measurements shall be performed during a working process (typical working conditions). If working conditions change and a risk increase has been determined or is possible, additional measurements of chemical substances shall be carried out. 22. If fast acting chemical substances are discharged in the air of the working environment, an alarm system shall be installed for the control of such substances, which notifies regarding the exceeding of the occupational exposure limit value (OEV). 23. If employees are exposed to more than one chemical substance or mixture (simultaneously or gradually), the risk shall be assessed taking into account the potential mutual and total exposure of all the chemical substances and mixtures used at work and the effect thereof on the safety and health of employees: 23.1. if in the air of the working environment there are several chemical substances with opposite (antagonistic) effects concurrently, the occupational exposure limit values (OEVs) shall remain the same as in case when each substance would affect separately; or 23.2. if in the air of the working environment there are several dangerous chemical substances with a similar (synergic) activity, the total effects of these substances shall be calculated using the following formula: where C1; C2; Cn – the concentration of the substances in the air of the working environment (mg/m³); AER1; AER2; AERn – the occupational exposure limit values of the substances (mg/m³). Translation © 2019 Valsts valodas centrs (State Language Centre) 6 The actual concentration ratio of the substances exposure against OEV (exposure index EI) may not exceed 1 in summing. If the sum of these fractions is 1, it complies with the limit value of the total effect. [1 February 2011] 24. The employer shall document the results of the risk assessment, including measurement results necessary for the risk assessment and measures taken for the elimination or reduction of risk caused by chemical substances and mixtures. Such documentation shall be kept for at least three years. [1 February 2011] 25. The employer shall ensure the possibility for employees, trusted representatives thereof and representatives of employees to become acquainted with the risk assessment and measurement results, as well as with the effect of chemical substances and mixtures on the safety and health of employees. [1 February 2011] 26. The employer shall ensure accessibility of the risk assessment results, including measurement results, to a doctor or an institution responsible for the health care of employees. 27. [1 February 2011] 28. [1 February 2011] 29. [1 February 2011] III Prevention and Reduction of Risk 30. If the type of work and technical capabilities permit this, the employer shall replace the dangerous chemical substances and dangerous mixtures with chemical substances and mixtures that are not dangerous or are less dangerous in the particular working conditions to the safety and health of employees. [1 February 2011] 31. If a risk to the safety and health of employees has been determined, the employer shall eliminate such risk or, if it is not possible considering the specific nature of the work, reduce the risk, taking the following measures: 31.1. equip the workplace with appropriate equipment, as well as ensure such work organisation, technical methods and technological processes that do not cause a risk to the safety and health of employees; 31.2. ensure the regular maintenance of technological equipment, workplaces and facilities; 31.3. by assigning an employee to work with chemical substances and mixtures, take into account the professional education, experience, training and level of preparedness of the employee in the field of labour protection; 31.4. restrict the number of such employees who work with chemical substances and mixtures; 31.5. eliminate the contact of employees with chemical substances and mixtures or reduce to the minimum the duration and intensity of exposure thereof; 31.6. ensure that only such amount of chemical substances and mixtures that are necessary for the performance of particular work is present in work premises; and 31.7. when planning and organising the work process: Translation © 2019 Valsts valodas centrs (State Language Centre) 7 31.7.1. ensure correct storage of chemical substances and mixtures taking into account the compatibility, explosive and fire safety properties thereof; 31.7.2. separate the place of storage of chemical substances and mixtures from work premises and equip it with exhaust ventilation; 31.7.3. eliminate the release of chemical substances, but if the release has occurred, provide immediate measures for the liquidation or reduction of the consequences of the release; 31.7.4. classify and mark chemical substances and mixtures, as well as waste containing such substances or mixtures, ensure safe and fast collection thereof in accordance with the regulatory enactments regarding the classification, marking, packaging, storage, transportation and utilisation of chemical substances and mixtures, as well as dangerous waste; 31.7.5. demarcate the workplaces appropriately and use safety signs and notices specified in the regulatory enactments regarding labour protection requirements for the use of safety signs; 31.7.6. develop action measures for potential emergency situations; and 31.7.7. arrange premises appropriate for the rest and practical needs of employees in which the risk caused by chemical substances and mixtures has been eliminated. [1 February 2011] 32. Risk elimination and reduction measures shall be performed in the following order: 32.1. elimination or maximum reduction of the risk caused by chemical substances and mixtures at a workplace by establishing an appropriate system of work processes and technical supervision; 32.2. utilisation of appropriate work equipment, technologies and materials, and control of the work environment for the elimination or reduction of the spreading of dangerous chemical substances; 32.3. selection and introduction of collective protection measures directly at the source of the risk (for example, the general and, if necessary, local exhaust ventilation has been arranged according to the project and calculations); and 32.4. utilisation of individual labour protection measures, including personal protection equipment if the effect of chemical substance and mixture exposure may not be eliminated by the measures referred to in this Paragraph. [1 February 2011] 33. If it has been determined that the occupational exposure limit values (OEV) of chemical substances have been exceeded, the employer shall immediately take appropriate labour protection measures. 34. In storing, replacing and separating incompatible chemical substances and mixtures, the employer shall take into account the risk caused by the physical, chemical and toxic properties of the specific chemical substances and mixtures and perform the following technical and organisational measures for the provision of safety and health of employees: 34.1. eliminate the accumulation of a dangerous concentration of highly flammable substances or chemically unstable substances (substances which under the influence of various external factors do not retain their properties for a long time) at the workplace and in the air of the work environment; 34.2. ensure compliance with the fire safety and explosion-proof regulations and exclude the presence of ignition sources at workplaces where activities with explosive chemical substances, mixtures and highly flammable and chemically unstable substances or mixtures thereof are performed; Translation © 2019 Valsts valodas centrs (State Language Centre) 8 34.3. ensure provision of the first aid and other measures that reduce the effect of harmful factors on the health and safety of employees if fire or explosion has occurred due to the ignition of flammable substances or reduce other consequences caused by chemically unstable substances or mixtures thereof; and 34.4. ensure compliance with the regulatory enactments in respect of the safety of equipment and protective systems to be used in an explosive atmosphere. [1 February 2011] 35. The employer shall ensure the labelling of packaging, containers and pipelines of chemical substances and placement of safety signs at workplaces, and conformity of the labelling with the contents of the packaging, container or pipeline in accordance with the regulatory enactments regarding the procedures for the classification, labelling and packaging and labour protection requirements for the use of safety signs. [1 February 2011] IV Measures in Emergency Situations 36. If regulatory enactments regarding the procedures for the assessment of risk of industrial accidents and measures for risk reduction are binding on the undertaking, the employer shall ensure a prior notification in accordance with this Regulation. 37. If regulatory enactments regarding the procedures for the assessment of risk of industrial accidents and measures for risk reduction are not binding on the undertaking, but in carrying out the assessment of risk it is determined that there is a risk of accident involving dangerous chemical substances or mixtures, and it is foreseeable that the consequences of an accident would affect the territory outside the undertaking, the employer shall submit the information in writing to the relevant territorial unit of the State Fire-fighting and Rescue Service, indicating the chemical substance or the name of the mixture, class of dangerousness, as well as the relevant risk and safety phrases. [1 February 2011] 38. The employer in accordance with the risk assessment shall develop measures to be taken by employees in case of potential incidents or accidents at workplaces where work with chemical substances and mixtures is performed and which are subject to the risk of an accident, determining the responsible employees and indicating the procedures on how to contact these employees in an emergency situation, as well as indicating the telephone numbers of responsible employees and the State Fire-fighting and Rescue Service, as well as determining the information to be notified in case of an accident. [1 February 2011] 39. Theoretical and practical training of employees regarding the provision of first aid and action in emergency situations (for example, fire, release of chemical substances) shall be organised at least once a year taking into account the specific nature of the workplace and properties of chemical substances and mixtures to be used at work. [1 February 2011] 40. If an emergency situation occurs, the employer shall immediately inform employees thereof and take measures for the elimination or reduction of the harmful effects of the chemical substances and mixtures and the stabilisation of the situation (for example, disconnection of equipment, evacuation of employees, containment of fire, leakage control, determination and demarcation of the danger zone). [1 February 2011] Translation © 2019 Valsts valodas centrs (State Language Centre) 9 41. Only such employees as are involved in repairs or who take specific measures for the elimination of the emergency situation, and who are specially trained for such actions, may be present in the danger zone in emergency situations. Only such repairs or other work necessary for the elimination or reduction of consequences and threat caused by the emergency may be performed in the danger zone in emergency situations. 42. The employer shall provide employees working in the danger zone with personal protective equipment, specialised safety equipment and work equipment appropriate for the particular working conditions. Personal protective equipment, specialised safety equipment and work equipment shall be used until the dangerous factors are completely eliminated in accordance with the risk assessment of such factors and the instructions of the manufacturer. Persons without appropriate personal protective equipment are prohibited from being present in the danger zone in emergency situations. 43. The employer shall ensure efficient operation of alarm and emergency communication means in order to provide information immediately to each employee regarding the threats to his or her safety and health. 44. The employer shall regularly, but at least once a year in conformity with the risk assessment, revise and update the measures to be performed in emergency situations, as well as for the elimination of an emergency situation. V. Consultation, Information and Training 45. The employer shall provide employees and trusted representatives thereof with the training appropriate to the specific nature of work and necessary information regarding the relevant labour protection measures so that each employee knows how to protect himself or herself and other employees at the workplace. The employer shall ensure the following information: 45.1. regarding the risk assessment performed in accordance with the requirements of Chapter II of this Regulation taking into account any changes at a workplace that may change the risk assessment data; 45.2. regarding measures for risk elimination and reduction, and changes in the risk assessment data; 45.3. regarding chemical substances and mixtures in the workplace, concentration thereof in the air of the work environment, risk to safety and health of employees, as well as regarding the occupational exposure limit values (OEV) of chemical substances and mixtures; 45.4. regarding the characterisation of chemical substances and mixtures provided for in the safety data sheets in accordance with Article 31 of Regulation (EC) No 1907/2006 of the European Parliament and of the Council of 18 December 2006 concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), establishing a European Chemicals Agency, amending Directive 1999/45/EC and repealing Council Regulation (EEC) No 793/93 and Commission Regulation (EC) No 1488/94 as well as Council Directive 76/769/EEC and Commission Directives 91/155/EEC, 93/67/EEC, 93/105/EC and 2000/21/EC; 45.5. regarding action and measures in emergency situations. [1 February 2011; 7 April 2015] 46. The employer shall provide training of such employees who come or may come into contact with chemical substances or mixtures: 46.1. prior to the commencement of work; Translation © 2019 Valsts valodas centrs (State Language Centre) 10 46.2. regularly, at least once a year; and 46.3. repeatedly if changes which may affect the safety and health of employees have occurred in the work environment, new information regarding the properties of the chemical substances has been received or it has been determined that the level of knowledge of the employee is not adequate. [1 February 2011] 47. Employees, trusted representatives of employees and representatives thereof shall consult and participate in resolving of the issues provided for in this Regulation in accordance with the Labour Protection Law. VI. Special Restrictions and Prohibitions for the Production, Manufacture and Use of Chemical Substances and Mixtures at Workplaces, as well as in Performing Other Activities Therewith [1 February 2011] 48. Special restrictions that relate to the activities with individual dangerous chemical substances shall be regulated by the regulatory enactments regarding restrictions on the production, trade and use of dangerous chemical substances and mixtures, except the following cases: 48.1. performance of scientific research, tests and analysis; 48.2. processing or destruction of chemical substances and mixtures – by-products or production waste; and 48.3. production and utilisation of chemical substances and mixtures as intermediate products in a unified, continual process. [1 February 2011] 49. In the exception cases specified in Paragraph 48 of this Regulation it is permitted to perform activities with individual dangerous chemical substances if the requirements referred to in Paragraph 50 of this Regulation have been complied with and the employer has prepared and submitted to the control authorities the following data prior to the commencement of work: 49.1. justification of the exception; 49.2. calculations on the quantity of chemical substances or mixtures to be used per year; 49.3. descriptions of such activities (reactions, processes) during which the relevant chemical substance or mixture is used; 49.4. the estimated number of employees; and 49.5. the technical and other measures that eliminate or reduce the risk to the safety and health of employees. [1 February 2011] 50. The chemical substances and mixtures referred to in Paragraph 48 of this Regulation may be produced and utilised only when production and utilisation is performed in a closed system (a system which does not allow direct contact of an employee with a chemical substance or mixture) from which chemical substances are output only if it is necessary for the control of the process or system maintenance. [1 February 2011] Translation © 2019 Valsts valodas centrs (State Language Centre) 11 VII. Health Surveillance of Employees 51. Mandatory health examinations shall be performed for employees who may come into contact with chemical substances and mixtures at a workplace in accordance with the procedures specified by regulatory enactments regarding mandatory health examination. Upon sending an employee to a mandatory health examination, the employer shall indicate information in the mandatory health examination card regarding chemical substances, the type and duration of exposure thereto and the concentration thereof in the air of the working environment. [1 February 2011] 52. If an employee comes or may come into contact with chemical substances or mixtures at the workplace, a competent specialist or a competent authority and the State Labour Inspectorate, if necessary, shall have access to the results of his or her health examination in accordance with the Labour Protection Law. [1 February 2011] 53. An employee who comes or may come into contact with chemical substances or mixtures at the workplace has the right to become acquainted with the results of the health examination related thereto. [1 February 2011] 54. If employees come or may come into contact with chemical substances and mixtures at the workplace, the results of the health examination shall be taken into account when developing labour protection measures at a particular workplace. [1 February 2011] 55. If it has been determined in a health examination that a disease or health disorders of employees have been caused due to the contact with chemical substances or mixtures at the workplace or the biological limit values (BLV) have been exceeded: 55.1. a doctor of occupational diseases shall inform the employee regarding the results of the mandatory examination and provide information and instructions regarding health care also after termination of the effect of the chemical substances, as well as in accordance with the regulatory enactments regarding the procedures for the performance of mandatory health examinations shall notify the employer regarding non-conforming conditions of the work environment which may negatively affect other persons employed in similar conditions, indicating, that they also are recommended to undergo mandatory health examinations; 55.2. the employer shall carry out a repeat evaluation of the risk assessment results and labour protection measures that eliminate or reduce the relevant risk in conformity with Chapter III of this Regulation; 55.3. the employer shall consider the recommendations of a doctor of occupational diseases or occupational health care, a labour protection specialist, a competent specialist or a competent authority when taking measures of labour protection for the elimination or reduction of the risk caused by chemical substances and mixtures, providing a possibility to assign employees to alternative work where the risk of exposure to chemical substances and mixtures does not exist; and 55.4. the employer shall ensure systematic health surveillance and provide a repeat health examination to any employee who has been subject to similar exposure of chemical substances or mixtures. [1 February 2011] Translation © 2019 Valsts valodas centrs (State Language Centre) 12 55.1 The employer shall keep the data of health examinations referred to in this Chapter for 40 years after the last known contact of the employee with chemical substances, afterwards the data shall be handed over to the archives. If the employer is liquidated, the data of health examinations shall be kept in accordance with the requirements specified in the regulatory enactments regarding keeping of archive documents. [1 February 2011] VIII. Closing Provisions 56. Cabinet Regulation No. 399 of 3 September 2002, Labour Protection Requirements when in Contact with Chemical Substances at Workplaces (Latvijas Vēstnesis, 2005, No. 72) is repealed. Informative Reference to European Union Directives [1 February 2011; 7 April 2015; 10 July 2018] This Regulation contains legal norms arising from: 1) Commission Directive 91/322/EEC of 29 May 1991 on establishing indicative limit values by implementing Council Directive 80/1107/EEC on the protection of workers from the risks related to exposure to chemical, physical and biological agents at work; 2) Council Directive 98/24/EC of 7 April 1998 on the protection of the health and safety of workers from the risks related to chemical agents at work (fourteenth individual Directive within the meaning of Article 16(1) of Directive 89/391/EEC); 3) Commission Directive 2000/39/EC of 8 June 2000 establishing a first list of indicative occupational exposure limit values in implementation of Council Directive 98/24/EC on the protection of the health and safety of workers from the risks related to chemical agents at work; 4) Directive 2004/37/EC of the European Parliament and of the Council of 29 April 2004 on the protection of workers from the risks related to exposure to carcinogens or mutagens at work (Sixth individual Directive within the meaning of Article 16(1) of Council Directive 89/391/EEC); 5) Commission Directive 2006/15/EC of 7 February 2006 establishing a second list of indicative occupational exposure limit values in implementation of Council Directive 98/24/EC and amending Directives 91/322/EEC and 2000/39/EC; and 6) Commission Directive 2009/161/EU of 17 December 2009 establishing a third list of indicative occupational exposure limit values in implementation of Council Directive 98/24/EC and amending Commission Directive 2000/39/EC; 7) Directive 2014/27/EU of the European Parliament and of the Council of 26 February 2014 amending Council Directives 92/58/EEC, 92/85/EEC, 94/33/EC, 98/24/EC and Directive 2004/37/EC of the European Parliament and of the Council, in order to align them to Regulation (EC) No 1272/2008 on the classification, labelling and packaging of substances and mixtures; 8) Commission Directive (EU) 2017/164 of 31 January 2017 establishing a fourth list of indicative occupational exposure limit values pursuant to Council Directive 98/24/EC, and amending Commission Directives 91/322/EEC, 2000/39/EC and 2009/161/EU. Prime Minister A. Kalvītis Acting for the Minister for Welfare, Minister for the Environment R. Vējonis Translation © 2019 Valsts valodas centrs (State Language Centre) 13 In Revised Version Submitted by the Ministry of Welfare Annex 1 Cabinet Regulation No. 325 15 May 2007 Occupational Exposure Limit Values (OEV) of Chemical Substances in the Air of the Work Environment [1 February 2011; 7 April 2015; 10 July 2018] No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 1. 200-835-2 75-05-8 Acetonitrile (cyanomethane) CH3CN 70 40 - - Skin 2. 75-07-0 Acetaldehyde (ethanal) CH3CHO 5 - - 3. 50-78-2 Acetylsalicylic acid (2-acetoxybenzoic acid) 0.5 - - 4. 98-86-2 Acetophenone (phenyl methyl ketone) 5 - - 5. 75-86-5 Acetone cyanohydrin (-α-hydroxyisobutyronitrile 2-hydroxy-2 methylpropionitrile) 0.9 - - O COOH OC-CH3 C CH3 O COH C CH 3 CH 3 N Translation © 2019 Valsts valodas centrs (State Language Centre) 14 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 6. 200-662-2 67-64-1 Acetone (2-propanol, dimethyl ketone) CH3COCH3 1210 500 - 7. 124-04-9 Adipic acid (1,4- butanedicarboxylic acid) HOOC(CH2)4COOH 4 - - 8. 626-86-8 Adipic acid monoethylester (1,4-butanedicarboxylic acid monoethylester) HOOC(CH2)4COOCH2CH3 3 - - 9. Coal tar and pitch sublimates with average content of benzopyrene (CAS No. 50 32-8): * less than 0,075 % 0.2 - - * 0,075-0,15 % 0.1 - - * 0,15-0,3 % 0.05 - - 10. 79-06-1 Acrylamide (propenoic acid amide) 0.2 - 11. 107-13-1 Acrylonitrile (cyanoethylene) H2C=CH-CN 0.5 - - Auditory effect 12. 201-177-9 79-10-7 Acrylic acid (propenoic acid) propene-2 acid H2C=CH-COOH 5 1.7 594 204 13. 376-84-1 Acrylic acid 1H, 1H, 5H octafluoropenthyl ester (2,2,3,3,4,4,5,5 H2C=CHCOOCH2 (CF2)5 CF3 30 - - CH 2 CH C NH 2 O Translation © 2019 Valsts valodas centrs (State Language Centre) 15 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) octafluoropenthyl acrylate 2-propenoic acid 2,2,3,3,4,4,5,5 octafluoropenthyl ester) 14. 103-11-7 Acrylic acid 2-ethylhexyl ester (2-propenoic acid 2 ethylhexyl ester 2-ethylhexyl acrylate) H2C=CHCOOCH2 CH(C2H5)(CH2)3CH3 1 - - 15. 818-61-1 Acrylic acid 2-hydroxyethyl ester (2-hydroxyethyl acrylate) H2C=CH-COOCH2CH2OH 0.5 - 16. 814-68-6 Acrylic acid chloroanhydride (acryloilchloride propenoyl chloride) H2C=CH-COCl 0.3 - 17. 203-453-4 107-02-8 Acrolein (acrylaldehyde, 2 propenal) H2C=CH-CHO 0.05 0.02 0.12 0.05 18. 107-95-9 β- alanine (3-aminopropanoic acid) NH2CH2CH2COOH 10 - 19. 203- 470-7 107-18-6 Allyl alcohol (2-propene-1-ol) CH2=CHCH2OH 4.8 2 12 1 5 Skin 20. 21645-51-2 Aluminium hydroxide Al(OH)3 6 - - 21. 24304-00-5 Aluminium nitride AlN 6 - - 22. 1344-28-1 Aluminium oxide Al2O3 * in the aerosol form of 6 - - Translation © 2019 Valsts valodas centrs (State Language Centre) 16 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) disintegration * in the mixture with nickel (up to 15 %), (electro corundum) 4 - - 23. 7429-90-5 Aluminium and alloys thereof (by aluminium) Al 2 - - 24. Tin inorganic compounds after Sn 2 - - - 25. 211- 047-3 628-63-7 Amyl acetate (pentyl acetate pentyl ethanoate) CH3COO(CH2)4CH3 270 50 540 100 26. 620-11-1 3-Amyl acetate (3-pentyl acetate, 3-pentyl ethanoate) CH3COOCH(C2H5)2 270 50 540 100 27. 625-16-1 tert-amyl acetate acetic acid 2-methyl-2 butylester (tert-pentyl acetate) CH3COOC(CH3)2C2H5 270 50 540 100 28. 110-53-2 Amyl bromide (pentyl bromide) CH3(CH2)4Br 0.3 - - 29. 638- 49-3 Amyl formate (pentyl formate, formic acid pentyl ester) HCOOC5H11 10 - - 30. 71-41-0 Amyl alcohol (1-pentanol) CH3(CH2)3CH2OH 10 - - 30.1 200-521-5 61-82-5 Amitrole (1,2,4-triazol-3 amine) C2H4N4 0.2 Translation © 2019 Valsts valodas centrs (State Language Centre) 17 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 31. Amines, alyphatic (alkyl amines) H2N-R, R ≥ C7 1 - - 32. 1918-02-1 4-Amino-3,5,6 trichloropicolinic acid (4-Amino-3,5,6 trichloropyridine-2-carboxylic acid, tordon-22k, picloram) 2 - - 33. 3060-41-1 3-Amino-4-phenylbutyric acid hydrochloride (phenibute) 1 - - 34. 6928-85-4 1-Amino-4-methylpiperazine (4-methylpiperazine-1amine) 2 - - 35. 205-483-3 141-43-5 2-Aminoethanol (monoethanolamine) NH2CH2CH2OH 0.5 0.2 7.6 3 Skin 36. 111-41-1 2-(2-Aminoethylamino) ethanol NH2CH2CH2NHCH2CH2OH 3 - - 37. 591-27-5 3-aminophenol 1 - - 38. 123-30-8 4-aminophenol 1 - - 39. 929-17-9 7-Aminoheptanoic acid H2N(CH2)6COOH 8 - - 40. AMINOACIDS N NH2 Cl Cl COOH Cl C 6 H 5 NH 2 OH O ClH NNNH 2 CH 3 OH NH 2 NH2 OH Translation © 2019 Valsts valodas centrs (State Language Centre) 18 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 56-41-7 L-alanine (2-aminopropionic acid α-aminopropionic acid) CH3CH(NH2)COOH 5 - - 41. 74-79-3 Arginine (2-amino-5-guanidinovaleric acid) 10 42. 56-84-8 Aspartic acid (2-aminosuccinic acid) HOOCCH2CH(NH2)COOH 10 43. 52-90-4 Cysteine (2- amino -3 mercaptopropanoic acid, α -- amino- β mercaptopropionic acid) HSCH2CH(NH2)COOH 2 44. 56-89-3 Cystine (3,3'-Dithiobis-2 aminopropanoic acid, 2-amino-3-(2-amino-2 carboxyethyldisulfanyl)propa noic acid) 2 45. 63-91-2 Phenylalanine (2-amino-3-phenyl-propanoic acid, α -- amino- β phenylpropionic acid) C6H5-CH2 CH(NH2)COOH 5 46. 56-40-6 Glycine (aminoacetic acid) NH2CH2COOH 5 N NH NH 2 H NH 2 OH O S S CH2CH(NH2)COOH CH2CH(NH2)COOH Translation © 2019 Valsts valodas centrs (State Language Centre) 19 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 47. 56-86-0 Glutamic acid (1-amino-propane-1,3 dicarboxylic acid) HOOCCH2CH2CH(NH2)CO OH 10 48. 71-00-1 Histidine (2-amino-3-(4 imidazolyl)propanoic acid) 5 49. 73-32-5 Isoleucine (2-amino-3-methyl-pentanoic acid) α --amino- β -.-methylvaleric acid) 5 50. 61-90-5 Leucine (2-amino-4-methyl-pentanoic acid) α - aminoisocaproic acid) (CH3)2CHCH2CH(NH2)COO H 5 51. 56-87-1 Lysine (2,6-diaminohexanoic acid, α, ε diaminocaproic acid NH2(CH2)4CH(NH2)COOH 5 52. 63-68-3 Methionine (2-amino-4 methylmercaptobutyric acid α – amino-g methylthiobutyric acid) CH3SCH2CH2CH(NH2)COO H 5 53. 98-79-3 5-Oxoproline (glutamic acid 5-lactam pyrrolidone-5-carboxylic 5 N N NH 2 H COOH CH 3 CH 3 NH 2 COOH N H COOHO Translation © 2019 Valsts valodas centrs (State Language Centre) 20 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) acid) 54. 147-85-3 Proline (2-pyrrolidinecarboxylic acid) 5 55. 56-45-1 Serine (2-amino-3-hydroxypropanoic acid) HOCH2CH(NH2)COOH 5 56. 60-18-4 Tyrosine (2-amino-3-(4 hydroxyphenyl)-propanoic acid, 3-(4-hydroxyphenyl)alanine) 2 57. 72-19-5 Threonine (2-amino-3-hydroxy-butanoic acid) CH3CH(OH)CH(NH2)COOH 2 58. 73-22-3 Tryptophan (2-amino-3-(3 indolyl)propanoic acid) 2 59. 72-18-4 Valine (2-amino-3-methyl-butanoic (CH3)2CHCH(NH2)COOH 5 N H COOH OH NH 2 COOH N H NH 2 COOH Translation © 2019 Valsts valodas centrs (State Language Centre) 21 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) acid) 60. 7783-28-0 Ammophos (ammonium hydrogen phosphate and dihydrogen phosphate mixture, diammonium hydrogen orthophosphate) NH4H2PO4, (NH4)2HPO4 6 61. 16919-58-7 Ammonium (IV)hexachloroplatinate (NH4)2[PtCl6] 0.005 62. 1309-32-6 Ammonium hexafluorosilicate (after fluorine) NH4SiF6 0.2 63. 12125-02-9 Ammonium chloride NH4Cl 10 64. 1762-95-4 Ammonium rodanide (ammonium thiocyanate) NH4SCN 5 65. 213-695-2 1002-89-7 Ammonium stearate [CH3(CH2)16COO]NH4 2 66. 7773-06-0 Ammonium sulfamate NH4SO3NH2 10 67. 7783-18-8 Ammonium thiosulphate (NH4)2S2O3 10 68. 231-635-3 7664-41-7 Ammonia NH3 14 20 36 50 69. 69-53-4 Ampicillin (adobacillin, Aminophenylmethyl penicillin, aminobenzylpenicillin) C16H20N3O4S 0.1 70. 5907-38-0 Analgine 0.5 N N O C 6 H 5 CH 3 CH 3N CH 3 NaO 3 S Translation © 2019 Valsts valodas centrs (State Language Centre) 22 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) (sodium [(2-phenyl-1,5 dimethyl-3-oxo-2,3-dihydro 1H-pyrazol-4-yl)-methyl amino]methanesulfonate) 71. Anaesthetic gases (halothane, sevoflurane, isoflurane, enflurane, desflurane , and other haloalkanes) 20 2 72. 62-53-3 Aniline (aminobenzene, phenylamine) 0.1 73. 104-94-9 Anisidine (p-anisidine; 4 amino-1-methoxybenzene, 4 methoxyaniline) 1 74. 7440-36-0 Antimony metallic dust Sb 0.2 0.5 75. 1309-64-4 Antimony trioxide (recalculating into antimony) Sb2O3 1 l76. 215-237-7 1314-60-9 Antimony pentoxide (recalculating into antimony) Sb2O5 2 77. Arsenic inorganic compounds (after arsenic) (As) 0.01 0.04 78. 12001-29-5 Asbestos 3 MgOx2 SiO2x2 H2O 0,1 sol. /cm3 air 79. 109-52-4 Valeric acid CH3CH2CH2CH2COOH 5 NH2 Translation © 2019 Valsts valodas centrs (State Language Centre) 23 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) (pentanoic acid) 80. 12253-23-5 Barium aluminate BaAl2O4 0.1 81. Barium aluminosilicate BaAl2Si2O8 0.5 1 82. 52869-91-7 Aluminum barium titanate 0.5 83. 23436-05-7 Barium borate (orthoboric acid barium salt) Ba3(BO3)2 0.5 84. 13718-55-3 Barium chloride fluoride (luminophores P – 385) BaClF 0.1 85. 7787-32-8 Barium fluoride BaF2 0.1 86. 10048-98-3 Barium hydrogenorthophosphate (barium hydrogen phosphate) BaHPO4 0.5 87. 52869-93-9 Barium calcium titanate BaCaTi2O6 0.5 88. 513-77-9 Barium carbonate BaCO3 0.5 89. 13462-86-7 Barium sulfate (barite) BaSO4 6 90. Barium soluble compounds after Ba 0.5 Skin 91. 125693-49 4 Barium tetratitanate BaTi4O9 0.5 92. 12047-27-7 Barium titanate (IV) BaTiO3 0.5 93. 103-83-3 Benzyldimethylamine C6H5CH2N(CH3)2 5 94. 50-32-8 Benz(a)pyrene (benzo[def]chrysene) 0.00015 Translation © 2019 Valsts valodas centrs (State Language Centre) 24 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 95. 100-52-7 Benzaldehyde C6H5CHO 5 96. 140-11-4 Benzyl acetate (acetic acid, benzyl ester) CH3COOCH2C6H5 5 97. 100-44-7 Benzyl chloride (-α-chlorotoluene) C6H5CH2Cl 5 98. 98-87-3 Benzylidene chloride (α,α- dichlorotoluene, benzal chloride, dichloromethylbenzene) C6H5CHCl2 0.5 99. 69-57-8 Benzylpenicillin (6-phenylacetamido penicillinic acid sodium salt) 0.1 100. 100-51-6 Benzyl alcohol (phenylmethanol, phenylcarbinol) C6H5CH2OH 5 101. 8030-30-6 Petroleum spirits (fuel) 100 102. 106-51-4 1,4- benzoquinone (p- benzoquinone) 0.05 103. 98-88-4 Benzoyl chloride C6H5COCl 5 S NCH3 CH 3 O N H CH 2 C 6 H 5 O OOCNa + O O Translation © 2019 Valsts valodas centrs (State Language Centre) 25 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) (benzoic acid chloroanhydride) 104. 200-753-7 71-43-2 Benzene C6H6 3.25 1 Skin 105. 528-44-9 1,2,4-benzenetricarboxylic acid (trimellitic acid) 0.1 106. 100-47-0 Benzonitrile (cyanobenzene) C6H5CN 1 107. 65-85-0 Benzoic acid C6H5COOH 5 108. 87-25-2 Benzoic acid 2-amino- ethyl ester (ethyl 2-aminobenzoate) C6H5COOCH2CH2NH2 5 109. 95-14-7 Benzotriazole 5 110. 7440-41-7 Beryllium and its compounds After Be 0.001 111. 13684-63-4 Betanal (phenmedipham, 1-pyridylacetic acid betaine, 1-carboxymethyl pyridinium betaine) 0.5 112. 92-52-4 Biphenyl (diphenyl) 10 N N N H HOOC COOH COOH N O O + Translation © 2019 Valsts valodas centrs (State Language Centre) 26 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 113. 366-18-7 and 553-26 4 2,2'- bipyridyl and 4,4' bipyridyl 2,2'-bipyridine and 4,4' bipyridine, 2,2'-dipyridyl and 4,4' dipyridyl) 0.2 114. 7440-69-9 Bismuth and its inorganic compounds After Bi 0.5 115. 12069-32-8 Boron carbide B4C 6 116. 10043-11-5 Boron nitride BN 6 117. 7637-07-2 Boron fluoride (boron trifluoride) BF3 1 118. 10043-35-3 Boric acid H3BO3 10 119. 63428-82-0 Boverin (mixture of isomers) 0.3 120. 231-778-1 7726-95-6 Bromine Br2 0.7 0.1 121. 353-59-3 Bromochlorodifluoromethane (freon 12Br difluorochlorobromomethane) CBrClF2 1000 122. 95-56-7 and 106-41-2 Bromophenol, o- and p isomers 0.3 123. 107-81-3 2-bromopentane CH3CHBrCH2CH2CH3 5 124. 75-63-8 Bromotrifluoromethane (trifluorobromomethane, F3BrC 3000 Br OH Br OH N N N N Translation © 2019 Valsts valodas centrs (State Language Centre) 27 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) freon 13 B1) 125. 233-113-0 10035-10-6 Hydrobromic acid HBr - - 6.7 2 126. 201-159-0 78-93-3 2-Butanone (methylethylketone, ethylmethylketone) CH3CH2COCH3 200 67 900 300 127. 106- 99-0 1,3-butadiene CH2=CH-CH=CH2 100 127.1 203-788-6 110-65-6 But-2-yn 1,4-diol (1,4 butynediol) C4H6O2/OHCH2CCCH2OH 0.5 128. 106-97-8 Butane CH3CH2CH2CH3 300 129. 205-480-7 141-32-2 n-Butyl acrylate CH2=CHCOO(CH2)3CH3 11 2 53 10 130. 109-73-9 Butylamine CH3CH2CH2CH2NH2 10 131. 109-65-9 Butyl bromide (1-bromobutane) CH3CH2CH2CH2Br 0.3 132. 75-91-2 tert-Butyl hydroperoxide 5 133. 109-69-3 Butyl chloride (1-chlorobutane) CH3CH2CH2CH2Cl 0.5 134. 111-36-4 Butyl isocyanate CH3CH2CH2CH2N=C=O 1 135. 97-88-1 Butyl methacrylate (2-propenoic acid, 2-methyl-, butyl ester) CH2=C(CH3)COOC4H9 30 136. 628-28-4 Butyl methyl ether CH3OC4H9 100 137. Butyl alcohol (primary, 10 CCH 3 CH 3 CH 3 O OH Translation © 2019 Valsts valodas centrs (State Language Centre) 28 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) secondary, tertiary) 71-36-3 (n-butanol, CH3CH2CH2CH2OH 1-butanol, 78-92-2 2-butanol, CH3CH2CH(OH)CH3 75-65-0 2-methyl-propan-2-ol, (CH3)3COH tert-butanol, 78-83-1 2-methyl-propan-1-ol, (CH3)2CHCH2OH iso-butyl alcohol) 138. 111-34-2 Butyl vinyl ether CH2=CHOC4H9 20 139. 203-905-0 111-76-2 2-butoxyethanol, (ethyleneglycol monobutyl ether, Butyl cellosolve) HOCH2-CH2-O-C4H9 98 20 246 50 Skin 140. 203-933-3 112-07-2 2-Butoxyethyl acetate (ethyleneglycol monobutyl ether acetate, butyl glycol acetate) CH3COOCH2CH2O(CH2)3CH 3 133 20 333 50 Skin 141. 203-961-6 112-34-5 2-(2-butoxyethoxy)ethanol (butyl diglycol) HOC2H4OCH2CH2O(CH2)3C H3 67.5 10 101.2 15 142. 61-24-5 525-94-0 28393-42-2 Cephalosporin C; Penicillin N (cephalosporin N); cephalosporin P; C16H21N3O8S C14H21N3O6S C33H50O8 0.3 143. 9004-34-6 Wood pulp 2 144. 65997-15-1 Cement 6 Translation © 2019 Valsts valodas centrs (State Language Centre) 29 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) (Portland cement) 145. 7758-88-5 Cerium (III) fluoride CeF3 0.5 2.5 146. 1306-38-3 Cerium dioxide CeO2 5 147. 21351-79-1 Caesium hydroxide CsOH 0.3 148. 206-992-3 420-04-2 Cyanamide (carbamonitrile) H2NCN 1 0.58 - - Skin 149. 200-821-6 74-90-8 Hydrogen cyanide (hydrocyanic acid) HCN 0.3 0.27 5 4.5 Skin 150. 203-631-1 108-94-1 Cyclohexanone O 40.8 10 81.6 20 Skin 151. 100-64-1 Cyclohexanone oxime 10 152. 203-806-2 110-82-7 Cyclohexane 80 23 153. 108-91-8 Cyclohexylamine 1 154. Cymol (2,3,4- mixture of isomers or separate isomers) (2-isopropyltoluene o-cymol 10 N OH NH2 CH 3 CH 3 CH 3 Translation © 2019 Valsts valodas centrs (State Language Centre) 30 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 3-isopropyltoluene m-cymol 4-isopropyltoluene p-cymol) 155. 12122-67-7 Zincethylene-N,N’ bisdithiocarbamate (N,N’-ethanediylbis dithiocarbamic acid zinc salt, zineb, cuprozan) 0.5 156. 1314-84-7 Zinc phosphide (trizinc diphosphide) Zn3P2 0.1 157. 10192-46-8 Zinc hexaborate (diboron trizinc hexaoxide) Zn2B6O11 1 158. 1314-13-2 Zinc oxide ZnO 0.5 159. 1314-98-3 Zinc sulphide ZnS 5 160. 112-30-1 n-Decyl alcohol (1-decanol) CH3(CH2)8CH2OH 10 160.1 207-069-8 431-03-8 Diacetyl (butanedione, dimethyl diketone) CH3COCOCH3 0.07 0.02 0.36 0.1 161. 131-17-9 Diallyl phthalate (1,2-benzenedicarboxylic acid, di-2-propenyl ester) 1 162. 83968-18-7 Dialkylphthalate 1 CH2 CH2 NHC S NHC S S S Zn COOCH 2 CH=CH 2 COOCH 2 CH=CH 2 COOC n H 2n+1 COOC n H 2n+1 Translation © 2019 Valsts valodas centrs (State Language Centre) 31 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) (1,2-benzenedicarboxylic acid, dialkyl esters) 163. 2687-25-4 2,3 Diaminotoluene (toluene-2,3- diamine) 2 164. 1303-86-2 Diboron trioxide B2O3 5 165. 105-99-7 Dibutyl adipinate (adipic acid dibutyl ester, hexanedioic acid dibutyl ester, 1,4-butane dicarbonic acid dibutyl ester) C4H9OOC(CH2)4COOC4H9 5 166. 2528-36-1 Dibutyl phenylphosphate (phosphoric acid, dibutyl phenyl ester) 0.1 167. 84-74-2 Dibutyl phthalate (DBP, 1,2-benzenedicarboxylic acid dibutyl ester) C6H4(COOC4H9)2 0.5 168. 502-56-7 Dibutyl ketone CH3(CH2)3CO(CH2)3CH3 20 169. 109-43-3 Dibutyl sebacinate (sebacic acid dibutyl ester decanedioic acid dibutyl C4H9OOC(CH2)8COOC4H9 10 NH2 CH3 NH2 P O(CH 2 ) 3 CH 3 O(CH 2 ) 3 CH 3 O C 6 H 5 O Translation © 2019 Valsts valodas centrs (State Language Centre) 32 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) ester) 170. 203-716-3 109-89-7 Diethylamine (C2H5)2 NH 15 5 30 10 171. 111-46-6 Diethylene glycol 2,2'-oxybisethanol, 2,2'-dihydroxydiethyl ether) HOCH2CH2-O-CH2CH2OH 10 172. 200-467-2 60-29-7 Diethyl ether C2H5-O-C2H5 308 100 616 200 173. 84-66-2 Diethyl phthalate (1,2-benzenedicarboxylic acid, diethyl ether) C6H4(COOC2H5)2 0.5 174. 82-66-6 Diphenacin (diphenylacetyl-1,3 Indandion, ratindan, diphacinone) 0.01 175. Diphenyls, chlorinated 1 175.1 202-981-2 101-84-8 Diphenyl ether (phenylene ether, phenoxybenzene) C6H5OC6H5 7 1 14 2 176. 76-12-0 1,2-Difluoro-1,1,2,2 tetrachloroethane (tetrachlorodifluoroethane, freon -112) Cl2FC-CFCl2 1000 177. 75-71-8 Dichloro-difluoro-methane (Freon 12) CCl2F2 3000 178. 624-72-6 1,2-Difluoroethane, (Freon 152) FH2C-CH2F 3000 O O O C 6 H 5 C 6 H 5 Translation © 2019 Valsts valodas centrs (State Language Centre) 33 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 179. 25497-29-4 1,2-Difluorochloroethane (Freon 142) FH2C-CHClF 3000 180. 200-871-9 75-45-6 Difluorochloromethane CHClF2 3600 1000 - 181. 886-77-1 Difurfurylideneacetone 10 182. 202-425-9 95-50-1 1,2-Dichlorobenzene, (o-dichlorobenzol) C6H4Cl2 122 20 306 50 Skin 183. 541-73-1 1,3-Dichlorobenzene (m-dichlorobenzol) Cl2C6H4 20 184. 203-400-5 106-46-7 1,4-dichlorobenzene, (p dichlorobenzene) C6H4Cl2 12 2 60 10 Skin 185. 200-863-5 75-34-3 1,1-Dichloroethane CH3CHCl2 412 100 - - Skin 186. 107-06-2 1,2-Dichloroethane C2H4Cl2 10 187. 79-43-6 Dichloroacetic acid Cl2CHCOOH 4 188. 102-36-3 3,4-Dichlorophenyl isocyanate 0.3 189. 149-74-6 Dichloro-phenyl-methyl silane (after HCL) C6H5SiCl2CH3 1 190. 27137-85-5 2,5-Dichlorophenyltri chlorosilane Cl2C6H3-SiCl3 1 191. 84-69-5 Diisobutyl phthalate C6H4(COOC4H9)2 1 CH CHCCH O CH O O Cl Cl NCO Translation © 2019 Valsts valodas centrs (State Language Centre) 34 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) (1,2-benzenedicarboxylic acid, diisobutylester) 192. 204-697-4 124-40-3 Dimethylamine (CH3)2NH 3.8 2 9, 4 5 193. 1149-23-1 2,6-dimethyl-1,4 dihydropyridine-3,5 dicarboxylic acid diethyl ester (2,6-dimethyl-3,5 diethoxycarbonyl-1,4 dihydropyridine, diludine, diethyl 1,4-dihydro-2,6 dimethylpyridine-3,5 dicarboxylate) 2 194. 204-826-4 127-19-5 N,N-Dimethylacetamide CH3CON(CH3)2 36 10 72 20 Skin 195. 108-01-0 2-(Dimethylamino) ethanol (N,N-dimethyl-2 hydroxyethylamine, N,N-dimethylethanolamine) (CH3)2NCH2CH2OH 5 196. 121-69-7 N,N-Dimethylaniline (N,N-dimethylphenylamine) (CH3)2N-C6H5 0.2 197. 103-83-3 N,N-Dimethylbenzylamine C6H5CH2N(CH3)2 5 198. 80-15-9 - -α α Dimethylbenzylhydroperoxid e (Cumolhydroperoxide) C9H12O2 1 199. 204-065-8 115-10-6 Dimethyl ether CH3-O-CH3 1920 1000 - - N H H H COOC 2 H 5 H 5 C 2 OOC CH 3 CH 3 Translation © 2019 Valsts valodas centrs (State Language Centre) 35 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 200. 576-26-1 2,6-Dimethylphenol (2,6-Xylenol) 2 201. 68-12-2 N,N-dimethylformamide HCON(CH3)2 15 5 30 10 Skin 202. 131-11-3 Dimethyl phthalate (1,2-benzenedicarboxylic acid, dimethyl ester) C6H4(COOCH3)2 0.3 203. 106-79-6 Dimethyl sebacate (1,8-octanedicarboxylic acid dimethyl ester, decanedioic acid dimethyl ester, sebacic acid dimethyl ester) CH3OOC(CH2)8COOCH3 10 204. 77-78-1 Dimethyl sulphate (CH3)2SO4 0.1 205. 75-18-3 Dimethyl sulphide H3C-S-CH3 50 206. 120-61-6 Dimethyl terephthalate (1,4-benzenedicarboxylic acid, dimethyl ester) 0.1 207. 110-71-4 1,2-dimethoxyethane (ethylene glycol dimethyl ether) CH3OCH2CH2OCH3 10 208. 203-714-2 109-87-5 Dimethoxymethane (formaldehyde dimethylacetal, methylal) CH3OCH2OCH3 10 CH 3 OH CH 3 H 3 COOC COOCH 3 Translation © 2019 Valsts valodas centrs (State Language Centre) 36 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 209. 528-29-0 1,2-dinitrobenzene C6H4(NO2)2 1 210. 99-65-0 1,3-dinitrobenzene C6H4(NO2)2 1 211. 100-25-4 1,4-dinitrobenzene C6H4(NO2)2 1 212. 25550-58-7 2,4-dinitrophenol 0.5 213. 27478-34-8 Dinitronaphthalene (mixture of 1,5- and 1,8- isomers) C10H6(NO2)2 1 214. 121-14 2,606-20 2,610 -39-9 Dinitrotoluene (2, 4- and 2,6 and 3,4-isomers) (NO2)2C6H3CH3 1 215. 84-76-4 Dinonylphthalate (1,2-benzenedicarboxylic acid, dinonyl ester) 1 216. 123-91-1 1,4-dioxane 20 5.5 217. 122-62-3 Dioctyl sebacate (octan-1,8-dicarboxilic acid dioctyl ester, sebacic acid dioctyl ester, bis(2-ethylhexyl) sebacate) C8H17OOC(CH2)8COOC8H17 10 218. 142-84-7 Dipropylamine (CH3CH2CH2)2NH 2 219. 1335-47-3 Ditolylmethane (CH3C6H4)2CH2 1 OH NO2 NO2 OO C C O O C9H19 O O C9H19 Translation © 2019 Valsts valodas centrs (State Language Centre) 37 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 220. 112-53-8 Dodecyl alcohol (dodecan-1-ol lauryl alcohol) CH3(CH2)10CH2OH 10 221. 25991-86-0 dodecahydr—1,1’- carbonyl bis-1H-azepin bis-azepan-1-ylmethanone, bis-N,N'-hexamethylene urea, carboxide (pesticide)) 0.5 222. 13463-40-6 Iron pentacarbonyl (pentacarbonyliron) Fe(CO)5 0.1 223. Iron ore (iron agglomerate) 4 224. 7439-97-6 Mercury and its inorganic compounds (after mercury) Hg 0.02 Auditory effect 224.1 21908-53-2 Mercuric oxide (after mercury) HgO 0.02 224.2 7487-94-7 Mercuric chloride (after mercury) HgCl2 0.02 225. 107-15-3 + 58-55-9 Elixophylline (theophylline + 1,2 ethylenediamine) 0.5 226. 106-89-8 Epichlorohydrin (3-chloro-1,.2-epoxypropane) C3H5ClO 1 NN O N N H O N CH3 O N CH3 +(CH2 NH2 ))2 Translation © 2019 Valsts valodas centrs (State Language Centre) 38 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 227. Epoxide resins (after epichlorohydrin) 0.5 228. 75-08-1 Ethanethiol (ethyl mercaptan C2H5SH 1 229. 94-19-9 Etazole amino-N-(5-ethyl [1,3,4]thiadiazol-2-yl) benzenesulfonamide, sulfaethidiole sulfaethylthiadiazole) 1 230. 108-24-7 Acetic acid anhydride CH3CO-O-COCH3 5 231. 123-86-4 Acetic acid butyl ester (n- butyl acetate) CH3COOC4H9 200 232. 205-500-4 141-78-6 Acetic acid ethyl ester (ethyl acetate) CH3COOC2H5 200 54 1468 400 233. 140-88-5 Ethyl acrylate (2-propenoic acid ethyl ester, acrylic acid ethyl ester) H2C=CH-COOC2H5 10 234. 200- 834-7 75-04-7 Ethylamine C2H5NH2 9.4 5 - - 235. 202-849-4 100-41-4 Ethylbenzene C6H5C2H5 442 100 884 200 Skin; Auditory effect 236. 74-96-4 Ethyl bromide (bromoethane) CH3CH2Br 5 237. 110-80-5 Ethyl cellosolve (ethylene C2H5-O-CH2CH2OH 8 2 Skin NH2 SO2 NH NN S C2H5 Translation © 2019 Valsts valodas centrs (State Language Centre) 39 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) glycol monoethyl ether, 2 ethoxyethanol) 238. 107-15-3 Ethylenediamine (1,2-diaminoethane) NH2CH2CH2NH2 2 239. 203-473-3 107-21-1 Ethylene glycol, (1,2-ethanediol) HOCH2-CH2OH 52 20 104 40 Skin 240. 818-61-1 Ethyleneglycol monoacrylester (propenoic acid 2 hydroxyethyl ester) CH2=CHCOOCH2CH2OH 0.5 241. 151-56-4 Ethyleneimine (aizirdine) 0.02 242. 75-21-8 Ethylene oxide (oxirane) 1 243. 74-85-1 Ethylene CH2=CH2 100 243.1 203-234-3 104-76-7 2-ethylhexan-1-ol (2-Ethyl-1 hexanol, 2-ethylhexyl alcohol) CH3(CH2)3CH(CH2CH3)CH2 OH 5.4 1 244. 200-830-5 75-00-3 Ethyl chloride (chloroethane) CH3CH2Cl 50 19 268 105 245. N-butyl-N-ethyl-S propylthiocarbamate (C2H5)N(C4H9)C(O)SC3H7 1 N H O Translation © 2019 Valsts valodas centrs (State Language Centre) 40 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) (tillam) 246. 64-17-5 Ethyl alcohol (ethanol) C2H5OH 1000 247. 200-580-7 64-19-7 Acetic acid (ethanoic acid) CH3COOH 25 10 50 20 247.1 111-15-9 2-ethoxyethyl acetate C6H12O3 11 2 Skin 248. 106-74-1 2-ethoxyethyl acrylate (acrylic acid 2-ethoxyethyl ester 2-propenoic acid 2 ethoxyethyl ester) CH2=CHCOOCH2CH2OC2H5 5 249. 85-01-08 Phenanthrene 0.8 250. 202-705-0 98-83-9 2-phenylpropene (isopropylbenzene α-methylstyrene) C6H5C(CH3)=CH2 246 50 492 100 251. 80-15-9 2-phenyl-2 propylhydroperoxide (cumene hydroperoxide, cumyl hydroperoxide, isopropylbenzene hydroperoxide, α,α-dimethylbenzyl 1 CH3 C6H5 C O OH CH3 Translation © 2019 Valsts valodas centrs (State Language Centre) 41 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) hydroperoxide) 252. 58-15-1 2-phenyl-4-dimethylamino 1,5-dimethyl-1,2 dihydropyrazol-3-one (amidopyrin piramidon) 0.5 253. 140-29-4 Phenylacetonitrile (benzyl cyanide) C6H5CH2CN 0.8 254. 6017-21-6 Phenylazomalondinitrile (2-phenylazomalononitrile, Phenylhydrazonomalononitril e) C6H5-N=NCH(CN)2 0.1 255. 108-45-2 m-Phenylene diamine (1,3-phenylenediamine) 0.1 256. 95-54-5 o-phenylenediamine (1,2-phenylenediamine) 0.5 257. 106-50-3 p-phenylenediamine (1,4-phenylenediamine) 0.05 258. 3006-93-7 N, N'-1,3 Phenylenedimaleimide (N,N’-(m-phenylene) disuccinimide) 1,1'-(1,3-Phenylene)bis(1H 1 NH2 NH2 NH2 NH2 NH 2 NH 2 N O O N O O Translation © 2019 Valsts valodas centrs (State Language Centre) 42 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) pyrrole-2,5-dione)) 259. 103-71-9 Phenyl isocyanate C6H5N=C=O 0.5 260. 1007-36-9 N-Phenyl-N'-methylurea C6H5NHCONHCH3 3 261. 122-59-8 Phenoxyacetic acid C6H5OCH2COOH 1 262. 713-68-8 m-Phenoxyphenol (3-Phenoxyphenol) 1 263. [1 February 2011] 264. 203-632-7 108-95-2 Phenol (hydroxybenzene) C6H5OH 8 2 16 4 Skin 265. Fluorides, inorganic By F 2.5 - - - 266. 231-954-8 7782-41-4 Fluorine F2 1.58 1 3.16 2 267. 430-57-9 1-Fluorine-1,2-dichloroethane (1,2-dichlorofluoro-ethane, freon 141) HClFC-CClH2 1000 268. 75-69-4 Trichloro-fluoro-methane (Freon 11) Cl3FC 1000 269. 231-634-8 7664-39-3 Hydrogen fluoride HF 1.5 1.8 2.5 3 270. Hydrofluoric acid salts (after F): * tin, ammonium, barium, zinc, potassium, lithium , sodium, silver fluorides, ammonium, hydrofluoride, trisodium hexafluoroaluminate, 0.2 0.5 1 2.5 O C6H5 OH Translation © 2019 Valsts valodas centrs (State Language Centre) 43 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) * aluminum, chrome, magnesium, calcium, strontium, copper 271. 50-00-0 Formaldehyde (methanal) HCHO 0.5 272. 232-260-8 7803-51-2 Phosphine PH3 0.14 0.1 0.28 0.2 273. 233-060-3 10026-13-8 Phosphorus (V) chloride (phosphorus pentachloride) PCl5 1 - - - 274. 215-236-1 1314-56-3 Phosphorus (V) oxide, (diphosphorus pentaoxide, phosphorus pentaoxide) P2O5 1 - - - 275. 10025-87-3 Phosphorus oxychloride (phosphoryl trichloride) POCl3 0.05 276. 215-242-4 1314-80-3 Phosphorus(V) sulphide, (diphosphorus pentasulphide) P4S10 1 - - - 277. 7719-12-02 Phosphorus trichloride PCl3 0.2 278. 231-633-2 7664-38-2 Phosphoric acid (orthophosphoric acid) H3PO4 1 - 2 - 279. 7723-14-0 Phosphorus P 0.03 280. 200-870-3 75-44-5 Phosgen (carbonyl dichloride) COCl2 0.08 0.02 0.4 0.1 281. 85-44-9 Phthalic anhydride (1,2-benzenedicarboxylic acid, anhydride) 1 C C O O O Translation © 2019 Valsts valodas centrs (State Language Centre) 44 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 282. 59-87-0 Furacilin (nitrofural, 5-nitrofuranyl semicarbazone) 0.5 283. 67-20-9 Furadonin (N-(5-Nitro-2-furfurylidene) 1-aminohydantoin, nitrofurantoin) 0.5 284. 1672-88-4 Furagin (N-[(5’-nitro-2’ furyl)acrylidene]-1 aminohydantoin, N-[2-(5’-nitrofuryl-2)-2 propenylidine]-1-amino hydantoin) 5 285. 110-00-9 Furan 0.5 286. 67-45-8 Furazolidone (3-(5 nitrofurfurylidenamino)-2 oxazolidinone) 0.5 287. 98-00-0 Furfuryl alcohol (2-Hydroxymethylfuran) 0.5 O OO2N CH N NH CO NH2 O2N O CH N N N H O O OO2N CH CH CH N N N H O O N O O O 2 N N O O CH2OH Translation © 2019 Valsts valodas centrs (State Language Centre) 45 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 288. 98-01-01 Furfural (2-formylfuran, 2-furancarboxaldehyde) 10 289. 357-70-0 Galantamine (herban, nururon, nivalin) C17H21NO3 0.05 290. 12024-21-4 Gallium oxides Ga2O3 and Ga2O 3 291. 10038-98-9 Germanium (IV) chloride (after germanium) GeCl4 1 292. 1310-53-8 Germanium dioxide (germanium (IV) oxide) GeO2 2 293. 7782-65-2 Germanium tetrahydride (germane) GeH4 5 293.1 200-240-8 55-63-0 Glyceryl trinitrate (nitroglycerin) C3H5(NO3)3 0.095 0.01 0.19 0.02 Skin 294. 111-30-8 Glutaraldehyd (glutaric acid dialdehyde, 1,5-pentanedial) OHC(CH2)3CHO 5 295. 116-16-5 Hexachloroacetone (hexachloropropanone) Cl3CCOCCl3 0.5 296. 118-74-1 Hexachlorobenzene C6Cl6 0.9 297. 999-97-3 Hexamethyldisilazane (CH3)3SiNHSi(CH3)3 2 O C H O Translation © 2019 Valsts valodas centrs (State Language Centre) 46 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 298. 124-09-4 Hexamethylenediamine (1,6-hexanediamine, 1,6-diaminohexane) (NH2CH2CH2CH2)2 0.1 299. 822-06-0 Hexamethylene diisocyanate (1,6-diisocyanatohexane) OCN(CH2)6NCO 0.05 300. 111-49-9 Hexamethyleneimine (homopiperidine, perhydroazepine) 0.5 301. 203-777-6 110-54-3 n-Hexane C6H14 72 20 Auditory effect 302. 205-563-8 142-82-5 n-Heptane CH3(CH2)5CH3 350 85 2085 500 303. 203-767-1 110-43-0 2-Heptanone (methyl pentyl ketone, Methyl-amyl-ketone) CH3-CO-C5H11 238 50 475 100 Skin 304. 203-388-1 106-35-4 3-Heptanone (ethylbutylcetone) C2H5-CO-C4H9 95 20 - - 305. 2499-58-3 Heptyl acrylate (propenoic acid, heptyl ester, acrylic acid, heptyl ester) H2C=CHCOO(CH2)6CH3 1 306. 111-70-6 Heptyl alcohol (heptanol) CH3(CH2)5CH2OH 10 307. 38066-16-9 Heterophos (O-ethyl O-phenyl S-propyl phosphorothioate, diethyl C11H17O3PS 0.02 N H Translation © 2019 Valsts valodas centrs (State Language Centre) 47 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) ((phenylthio)methyl)phospho nate) 308. 302-01-2 Hydrazine NH2NH2 0.1 308.1 262-967-7 61788-32-7 Hydrogen terphenyl (hydrogenated diphenylbenzenes) (C6H7)3 19 2 48 5 309. 109-78-4 3-Hydroxypropionitrile (2-Cyanoethanol) 10 310. 31282-04-9 Hygromycin B (antihelmycin) C20H37N3O13 0.001 311. 91-22-5 Quinoline 0.1 0.5 312. 627-30-5 3-Chloro-1-propanol (1-chloro-3-hydroxypropane, trimethylene chlorohydrin) Cl(CH2)3OH 2 313. 19210-21-0 2-Chloro-1-propanol CH3CH(Cl)CH2OH 2 314. 97-00-7 1-chloro-2,4-dinitro-benzene (2,4-dinitrochlorobenzene) 0.05 315. 127-00-4 1-Chloro-2-propanol (propylene chlorohydrin) CH3CH(OH)CH2Cl 2 N C N OH Cl NO2 NO2 Translation © 2019 Valsts valodas centrs (State Language Centre) 48 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 316. 118-97-8 4-chloro-3,5-dinitro-benzoic acid 1 317. 203-628-5 108-90-7 Chlorobenzene (monochlorbenzene) C6H5Cl 23 5 70 15 318. 106-48-9 4-chlorophenol ClC6H4OH 1 319. 01/10/1120 9-chlorononanoic acid (chloropelargonic acid) ClCH2(CH2)7COOH 5 320. 200-663-8 67-66-3 Chloroform (trichloromethane) CHCl3 10 2 - - Skin 321. 107-94-8 3-chloropropanoic acid ClCH2CH2COOH 5 322. 598-78-7 2-chloropropanoic acid (α –chloropropionic acid) CH3CH(Cl)COOH 2 323. 231-959-5 7782-50-5 Chlorine Cl2 1 0.3 1.5 0.5 324. 57-62-5 Chlortetracycline C22H23ClN2O8 0.1 325. 95-49-8 and 106-43-4 Chlorotoluene (o- and p— isomers) CH3C6H4Cl 10 326. 231-595-7 7647-01-0 Hydrogen chloride HCl 8 5 15 10 327. Chrome, metallic (insoluble inorganic chromium (II) chromium (III) compounds) 2 328. 7789-04-0 Chromium (III) phosphate after chromium (chromium orthophosphate CrPO4 2 Cl COOH O 2 N O 2 N Translation © 2019 Valsts valodas centrs (State Language Centre) 49 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) after chromium) 329. 1333-82-0 Chromium (VI) oxide (chromium trioxide) CrO3 0.01 330. Chromium dihydrogen phosphate, after chromium Cr(H2PO4)3 0.02 331. 10060-12-5 Chromium trichloride hexahydrate, after chromium CrCl3. 6H2O 0.01 332. 1308-38-9 Chromium (III) oxide, after chromium Cr2O3 1 333. 7783-20-2 + 7732-18-5 Chromium-ammonium sulphate, after Cr (chromium-ammonium alum) Cr2(SO4)3. (NH4)2SO4. 24H2O 0.02 334. 24613-89-6 Chromates, (dichromates), after chromium Me2CrO4 vai Me2Cr2O7 0.01 335. 204-662-3 123-92-2 Isoamyl acetate (isopentyl acetate, acetic acid 3-methylbutyl ester, 3-Methylbutyl acetate, isopentyl ethanoate) CH3COOCH2CH2CH(CH3)2 270 50 540 100 336. 123-51-3 Isoamylalcohol, (3-methyl-1-butanol, isopentyl alcohol) (CH3)2CHCH2CH2OH 5 337. 121-91-5 Isophthalic acid 0.2 COOH COOH Translation © 2019 Valsts valodas centrs (State Language Centre) 50 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) (1,3-Benzenedicarboxylic acid) 338. 201-142-8 78-78-4 Iso-pentane H3C–CH2–CH(CH3)2 3000 1000 339. 78-79-5 Isoprene (2-methyl-1,3-butadiene) 40 340. 67-63-0 Isopropanol (2-propanol, isopropyl alcohol, 1-methyl-1-ethanol) CH3CH(OH)CH3 350 600 341. 201-245-8 80-05-7 4,4'-Isopropylidenediphenol (bisphenol A) (CH3)2C(C6H4OH)2 2 5 – – – 342. 7553-56-2 Iodine I2 1 343. 2223-93-0 Cadmium stearate (CH3(CH2)16COO)2Cd 0.1 344. 7440-43-9 Cadmium and its inorganic compounds 0.01 0.05 345. 156-62-7 Calcium cyanamide CaNCN 1 346. 7789-75-5 Calcium fluoride CaF2 0.5 2.5 347. 7757-93-9 Calcium hydrogen phosphate CaHPO4 10 348. 215-137-3 1305-62-0 Calcium hydroxide, (calcium dihydroxide) Ca(OH))2 1 6 - 46 349. 7758-23-8 Calcium dihydrogen phosphate Ca(H2PO4)2 10 CH2=C CH=CH2 CH3 Translation © 2019 Valsts valodas centrs (State Language Centre) 51 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 350. 10043-52-4 Calcium chloride CaCl2 2 351. 471-34-1 Calcium carbonate CaCO3 6 352. Calcium nickel chromium phosphate (after nickel) 0.005 353. 215-138-9 1305-78-8 Calcium oxide CaO 16 46 353.1 7778-18-9 Calcium sulfate (hydrogenated; gypsum dust) CaSO4x2H2O 4 354. Potassium alkylxanthate, R=alkyl: isopropyl-, isobutyl-, isoamyl-e (potassium O alkyldithiocarbonate, R-alkyl: isopropyl-, isobutyl-, isoamyl ) KSCSO-R 1 355. 871-58-9 Potassium butylxanthate (Carbonic acid, dithio-, O butyl ester) KSCSO-C4H9 10 355.1 205-792-3 151-50-8 Potassium cyanide (after cyanide) KCN 1 5 Skin 356. 140-89-6 Ethyl potassium xanthogenate (Potassium O-ethyl dithiocarbonate) KSCSO-C2H5 0.5 357. 16871-90-2 Potassium fluorosilicate (after fluorine) (dipotassium K2[SiF6] 0.2 Translation © 2019 Valsts valodas centrs (State Language Centre) 52 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) hexafluorosilicate) 358. 14459-95-1 Tetrapotassium hexacyanoferrate (II) (yellow prussiate of potash) K4[Fe(CN)6] 4 359. 13746-66-2 Tripotassium hexacyanoferrate (III) (red prussiate) K3[Fe(CN)6] 4 360. 3811-04-09 Potassium chlorate KClO3 5 361. 7447-40-7 Potassium chloride KCl 5 362. 584-08-7 Potassium carbonate K2CO3 2 363. 7757-79-1 Potassium nitrate KNO3 5 364. 7778-80-5 Potassium sulphate K2SO4 10 365. 21368-68-3 Camphor (DL-bornan-2-one, 1,7,7 trimethylbicyclo(2,2,1)heptan 2-one) C10H16O 3 366. 203-313-2 105-60-2 ε – Caprolactam (dust and vapour) (ε - aminocaproic acid lactam) N O H 10 - 40 - 367. 142-62-1 Caproic acid (hexanoic acid) CH3(CH2)4COOH 5 368. 655-35-6 Carbocromen (intencordin, C20H27NO5 . HCl 0.3 Translation © 2019 Valsts valodas centrs (State Language Centre) 53 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) Iintensain, ethyl –[[3-[2 (diethylamino)ethyl]-4 methyl-2-oxo-2H-1 benzopyran-7-yl]oxy]acetate hydrochloride) 369. 1302-76-7 Kyanite (aluminium oxide with silicon dioxide admixture) Al2O5Si 2 370. 50-29-3 Clofenotane (INN) (1,1,1-trichloro-2,2-bis (4 chlorophenyl)-ethane, dichloro-diphenyl trichloroethane (DDT), p,p’-DDT (4,4'-DDT), 1,1-bis-(4-chlorophenyl) 2,2,2-trichloroethane) (ClC6H4)2CHCCl3 0.1 371. Cobalt hydrocarbonyl and cleavage product thereof (after Co) Co(CO)4H 0.01 372. 1307-96-6 Cobalt II oxide CoO 0.5 373. 1308-04-9 Cobalt III oxide Co2O3 0.5 374. 7440-48-4 Cobalt Co 0.5 375. 58-08-02 Caffeine (1,3, 7 – trimethylxanthine) 0.5 N N N N CH 3 CH 3 CH 3 O O Translation © 2019 Valsts valodas centrs (State Language Centre) 54 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 376. 8050-09-7 Colophony 4 377. Dyes: vinyl sulphone and chloro thiasine 2 378. Dyes: anthraquinone and phtalocyanine 5 379. Dyes, alkaline: arylmethane 0.2 380. Dyes, vat dyes: binaphthyl hexacarboxylic acid dianhydride derivatives 5 381. 215-293-2 1319-77-3 Cresol, (all isomers) (o-, m-, p-methylphenols, cresol mixture OH CH 3 22 5 - - 382. 10453-89-1 Chrysanthemumic acid (2,2-Dimethyl-3-(2-methyl-1 propenyl) cyclopropane-1 carboxylic acid) 10 383. 437-74-1 Xanthinol nicotinate (7-[2-hydroxy-3-((2 hydroxyethyl)-N methylamino] propyl) theophylline nicotinate) 1 CH 3 CH 3 HOOC C CH 3 CH 3 H N N O O CH 3 N N OH N CH 3 OH CH 3 N COOH Translation © 2019 Valsts valodas centrs (State Language Centre) 55 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 384. 215-535-7 1330-20-7 Xylene (o-, m-, p-xylene, dimethylbenzene) CH 3 CH 3 221 50 442 100 Skin 385. 203-576-3 108-38-3 m-xylene, (1,3-dimethylbenzene) C8H10 221 50 442 100 Skin 386. 202-422-2 95-47-6 o-xylene, (1,2-dimethylbenzene) C8H10 221 50 442 100 Skin 387. 203-396-5 106-42-3 p-xylene, (1,4-dimethylbenzene) C8H10 221 50 442 100 Skin; Auditory effect 388. 202-704-5 98-82-8 Cumene (isopropylbenzene, propylbenzene) CH(CH3)2 100 20 250 50 Skin; Auditory effect 389. 25038-59-9 Lavsan (polyethylene terephtalate, terylene) 5 390. 9013-95-0 Levan (polysaccharide ) (C6H10O5)n 1 391. 56-75-7 Levomycetin 1 392. 8032-32-4 Ligroine (after C) Petroleum ether 300 O2N CH CH CH2OH OH NH CO CHCl2 Translation © 2019 Valsts valodas centrs (State Language Centre) 56 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 393. 64742-82-1 Ligroine (naphtha, Hydrodesulfurized heavy; naphtha treated with hydrogen with low boiling point) (white spirit, white spirit) 200 300 394. 9001-62-1 Lipase (triacylglycerol) 1 395. 231- 484-3 7580-67-8 Lithium hydride LiH – – 0.025 396. 12007-25-9 Magnesium diboride (after boron) MgB2 1 397. 10326-21-3 Magnesium chlorate Mg(ClO3)2 5 398. 12230-32-9 Magnesium polyboride (Magnesium dodecaboride) MgB12 6 399. Magnesium- manganese ferrite MgMn(FeO2)4 1 400. 108-31-6 Maleic anhydride (maleinanhydride, 1,2-ethylendicarbonic acid anhydride) 1 401. 1313-13-9 Manganese dioxide (disintegration aerosol) MnO2 0.3 401.1 Manganese and its inorganic compounds (after manganese) 0.25 0.056 OO O Translation © 2019 Valsts valodas centrs (State Language Centre) 57 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 402. 07/05/3353 Manganese distearate [CH3(CH2)16COO]2Mn 3 403. 12108-13-3 Manganese cyclopentadienyl tricarbonyl (Tricarbonyl(methylcyclopent adienyl)manganese) 0.1 404. 12427-38-2 Manganese, ethylene-N,N bis-dithiocarbamate (maneb) 0.5 405. Manganese-zinc ferrite MnZn(FeO2)4 1 406. 7439-96-5 Manganese welding aerosol (condensation aerosol) 0.1 407. 8065-48-3 Mercaptophos (demeton, O,O-diethyl-O’’-(2 ethylthioethyl) thiophosphate and O,O’-diethyl-S-(2 ethylthioethyl) thiophosphate mixture) C2H5SCH2CH2OPS(OC2H5)2 and C2H5SCH2CH2SPO(OC2H5)2 0.02 408. 79-39-0 Methylacrylic amide (2-methylpropionic acid amide CH2=C(CH3)CONH2 1 409. 79-41-4 Methacrylic acid (2-2-methylpropionic acid) CH2=C(CH3)COOH 10 410. 760-93-0 Methacrylic acid anhydride (2-methylpropenoic acid 1 CH2 CH2 NHC NHC S S S S Mn H2C=C(CH3) H2C=C(CH3) C C O O O Translation © 2019 Valsts valodas centrs (State Language Centre) 58 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) anhydride, methacrylic anhydride) 411. 920-46-7 Methacrylic acid chloroanhydride (methacrylic chloride, 2-methylpropenoic acid chloroanhydride) CH2=C(CH3)COCl 0.3 412. 74-93-1 Methanethiol (methyl mercaptan) CH3SH 0.8 413. 200-659-6 67-56-1 Methanol (methyl alcohol, carbinol) CH3OH 260 200 - - Skin 414. 1569-50-2 3-Methyl-3-buten-1-ol (3-Penten-3-ol, 2,2-dimethylvinylcarbinols) 10 415. 80-59-1 2-methylbut-2-enoic acid 2-methylcrotonic acid, 2,3-dimethylacrylic acid) CH3CH=C(CH3)COOH 5 416. 638-10-8 3-methylbut-2-enoic acid ethyl ester (3,3-dimethylacrylic acid ethyl ester, crotonic acid, 3-methyl-, ethyl ester) (CH3)2C=CHCOOCH2CH3 10 CH 3 CH 3 OH Translation © 2019 Valsts valodas centrs (State Language Centre) 59 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 417. 3425-61-4 2-hydroperoxy-2-methyl butane (tert-Pentyl hydroperoxide) 5 418. 79-20-9 Methyl acetate (acetic acid, methyl ester) CH3COOCH3 100 419. 96-33-3 Methyl acrylate (methyl propenoate, acrylic acid, methyl ester, propenoic acid, methyl ester) CH2=CHCOOCH3 18 5 36 10 420. 74-83-9 Methyl bromide (bromomethane) CH3Br 1 421. 210-946-8 626-38-0 1-Methylbutyl acetate, (1-methylbutyl ethanoate) CH3COOCH(CH3)CH2CH2C H3 270 50 540 100 421.1 203-481-7 107-31-3 Methyl formate (formic acid methyl ester) HCOOCH3 125 50 250 100 Skin 422. 203-737-8 110-12-3 5-Methyl-2-hexanone (isopentyl methyl ketone, isoamyl methyl ketone, isobutyl acetone) (CH3)2CHCH2CH2COCH3 95 20 - - 423. 208-793-7 541-85-5 5-Methyl-3-heptanone (ethylisoamylketone) CH3CH2CH(CH3)CH2COCH2 CH3 53 10 107 20 424. 203-550-1 108-10-1 4-Methyl-2-pentanone, (isobutyl methyl ketone, methylisobutylketone, CH3C(O)CH2CH(CH3)CH3 83 20 208 50 CH 3 C CH 3 CH 2 CH 3 O OH Translation © 2019 Valsts valodas centrs (State Language Centre) 60 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) isopropyl acetate) 425. 872-50-4 1-Methyl-2-pyrrolidinone (N Methyl-2-pyrrolidone) C5H9NO 40 10 80 20 Skin 426. 208-601-1 534-52-1 2-methyl-4,6-dinitro-phenol (4,6-Dinitro-o-cresol, DNOC) (CH3) C6H2(NO2)2OH 0.05 427. 74-95-3 Methylene bromide (dibromomethane) CH2Br2 10 428. 200-838-9 75-09-2 Methylene chloride (dichloromethane) CH2Cl2 120 34 150 42 Skin 429. 74-87-3 Methyl chloride (chloromethane) CH3Cl 0.1 429.1 205-599-4 143-33-9 Sodium cyanide (after cyanide) NaCN 1 5 Skin 430. 624-83-9 Methylisocyanate CH3N=C=O 0.05 0.02 431. 563-80-4 Methyl isopropyl ketone (3-Methyl-2-butanone) CH3C(O)C(CH3)CH3 200 432. 556-61-6 Methyl isothiocyanate CH3N=C=S 0.1 433. 8022-00-2 Methyl mercaptophos (demeton-methyl, O,O’ dimethyl-O’’-(2 ethylthioethyl) thiophosphate and dimethyl-S-(2 ethylthioethyl) thiophosphate S=P(OCH3)2-O-(CH2)2S C2H5 and S=P(OCH3)2-S (CH2)2S-C2H5 0.1 Translation © 2019 Valsts valodas centrs (State Language Centre) 61 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) mixture) 434. 80-62-6 Methyl methacrylate 2-methyl-2-propenoic acid methyl ester, methyl 2-methylpropenoate) CH2=C(CH3)COOCH3 10 435. 25013-15-4 Methylstyrene (mixed isomers) (vinyltoluene, vinylbenzene) CH2=CH-C6H4CH3 50 Auditory effect 436. 98-83-9 α---Methylstyrene (2-phenylpropene) 5 437. 598-50-5 Methylurea (N-Methylurea) CH3NHC(O)NH2 10 438. 78-94-4 Methyl-vinyl-ketone (3-butene-2-one) 0.1 439. Welding aerosol 4 439.1 110-49-6 2-Methyoxyethyl acetate C5H10O3 1 Skin 439.2 109-86-4 2-Methoxyethanol C3H8O2 1 Skin 440. 203-603-9 108-65-6 2-methoxy-1-methylethyl acetate (propylene glycol monomethyl ether acetate) CH3COOCH(CH3)CH2OCH3 275 50 550 100 Skin 441. 252-104-2 34590-94-8 Methoxyisopropoxy propanol (dipropylene glycol CH3OC3H6OC3H6OH 308 50 - - Skin C CH2 CH3 CH3CCH=CH2 O Translation © 2019 Valsts valodas centrs (State Language Centre) 62 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) monomethyl ether, DMP) 442. 203-539-1 107-98-2 1-Methoxy-2-propanol (propylene glycol monomethyl ether, monopropylene glycol methyl ether) CH3CH(OH)CH2OCH3 375 100 568 150 Skin 443. 586-37-8 m-Methoxyacetophenone (3-acetylanisole, 3-acetylmethoxybenzene) 3 444. 203-906-6 111-77-3 2-(2-methoxyethoxy)ethanol C5H12O3 50.1 10 Skin 445. 203-604-4 108-67-8 Mesitylene (1,3,5-trimethylbenzene) CH3 CH3 H3C 100 20 - - 446. 79-11-08 Monochloroacetic acid (chloroacetic acid) ClCH2COOH 1 447. 79-04-09 Monochloroacetic acid chloroanhydride (chloroacetyl chloride) CH2ClCOCl 0.3 448. 203-815-1 110-91-8 Morpholine C4H9NO 36 10 72 20 CH 3 O O CH 3 Translation © 2019 Valsts valodas centrs (State Language Centre) 63 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 449. 202-049-5 91-20-3 Naphthalene 50 10 - - 450. 8030-30-6 Petroleum 10 451. Mineral oils, petroleum mineral oils 5 452. 1141-38-4 2,6-Naphthalenedicarboxylic acid 0.1 453. 93-09-4 2-Naphthalenecarboxylic acid (2-naphthoic acid) 0.1 454. 128-97-2 1,4,5,8 Naphthalenetetracarboxylic acid 0.5 455. 130-15-4 1,4-Naphthoquinone 0.1 456. 90-15-3 1-Naphthol (1-hydroxynaphthalene, α-naphthol) 0.5 HOOC COOH HOOC HOOC COOH COOH HOOC HOOC COOH COOH O O COOH OH Translation © 2019 Valsts valodas centrs (State Language Centre) 64 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 457. 135-19-3 2-Naphthol (2-hydroxynaphthalene, β-naphthol) 0.1 458. 247-852-1 26628-22-8 Sodium azide NaN3 0.1 - 0.3 - Skin 459. 4312-97-4 Sodium cis- β -chloroacrylate (acrofol, cis-3-Chloroacrylic acid sodium salt, cis-3-chloropropenoic acid sodium salt, sodium 3 chloroacrylate) 0.5 460. 16893-85-9 Sodium hexafluorosilicate Na[SiF6] 0.2 461. 144-55-8 Sodium hydrogencarbonate (baking soda) NaHCO3 5 462. 1310-73-2 Sodium hydroxide (soda lye, caustic soda) NaOH 0.5 463. 7775-09-09 Sodium chlorate NaClO3 5 464. 7647-14-5 Sodium chloride NaCl 5 465. 7758-19-2 Sodium chlorite NaClO2 1 466. 137-42-8 Sodium N methyldithiocarbamate (methyldithiocarbamate, methyldithiocarbamic acid, sodium salt, CH3-NH-C(S)SNa 0.1 OH Cl H H COO Na+ Translation © 2019 Valsts valodas centrs (State Language Centre) 65 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) carbathione) 467. 131-52-2 Sodium pentachlorophenolate C6Cl5ONa 0.1 468. 10332-33-9 Sodium perborate monohydrate NaBO3 . H2O 1 469. 10486-00-7 Sodium perborate tetrahydrate NaBO3 . 4H2O 1 470. 540-72-7 Sodium rhodanide (sodium thiocyanate) NaSCN 10 471. 7757-82-6 Sodium sulphate Na2SO4 10 472. 1313-82-2 Sodium sulphide Na2S 0.2 473. 207-343-7 463-82-1 Neopentane C5H12 3000 1000 474. 200-193-3 54-11-5 Nicotine, (3-(1-Methyl-2-pyrrolidinyl) pyridine N N CH 3 0.5 - - - Skin 475. 59-67-6 Nicotinic acid (pyridine-3-carboxylic acid) 1 476. 98-92-0 Nicotine acid amide (pyridine-3-carboxylic acid amide, nicotinamide) 1 477. 7440-02-0 Nickel, nickel oxides, sulphides and compounds (after Ni) Ni 0.05 N COOH N CO NH2 Translation © 2019 Valsts valodas centrs (State Language Centre) 66 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 478. 13977-71-4 Nickel chromophosphate NiCr(H2PO4)6 . H2O 0.005 479. 13463-39-3 Nickel carbonyl (tetracarbonyl nickel) Ni(CO)4 0.0005 480. 53025-58-4 Nitro 4 481. 88-74-4 2-nitroaniline (o-nitroaniline) 0.5 482. 99-09-2 3-nitroaniline (m-nitroaniline) 0.1 483. 100-01-6 4-nitroaniline (p-nitroaniline) 0.1 484. 100-17-4 4-nitroanisole (1-Methoxy-4-nitrobenzene) 3 485. 202-716-0 98-95-3 Nitrobenzene NO2 1 0.2 - - Skin 486. 585-79-5 m-Nitrobromobenzene (1-Bromo-3-nitrobenzene) 0.1 NH2 NO2 NH2 NO2 NH2 NO2 un O 2 N OCH 3 NO2 Br Translation © 2019 Valsts valodas centrs (State Language Centre) 67 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 487. 201-188-9 79-24-3 Nitroethane CH3CH2NO2 30 9.6 312 100 Skin 488. 75-52-5 Nitromethane CH3NO2 30 489. 88-72-2 99 08-1 99-99 0 Nitrotoluene (o-, m-, p-isomers) 3 490. 502-56-7 Nonan-5-one CH3(CH2)7CO(CH2)3CH3 20 491. 143-08-8 Nonyl alcohol (nonanol) CH3(CH2)7CH2OH 10 492. 204-696-9 124-38-9 Carbon dioxide CO2 9000 5000 - - 493. 211-128-3 630-08-0 Carbon (II) oxide (carbon monoxide, carbon monoxide gas) CO 20 17 117 100 Auditory effect 494. Carbon dust coal, anthracite and other coal dust, petroleum, coke, bituminous shale, black industrial soot 4 natural and artificial diamonds, graphite 2 495. Hydrocarbons, saturated aliphatic, C1-10 after C CnH2n+2 100 300 CH 3 NO 2 Translation © 2019 Valsts valodas centrs (State Language Centre) 68 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) (alkanes) 496. 66-79-5 Oxacillin C19H19N3O5S 0.05 497. 111-87-5 Octyl-alcohol (octanol) CH3(CH2)6CH2OH 10 498. 7060-74-4 Oleandomycin phosphate C35H61NO12.H3PO4 0.4 499. 10028-15-6 Ozone O3 0.1 500. 422-64-0 Propanoic acid, pentafluoro- CF3CF2COOH 2 501. 203-692-4 109-66-0 Pentane C5H12 3000 1000 502. 8006-61-9 Kerosene 100 300 503. 201-865-9 88-89-1 Picric acid, (2,4,6-trinitrophenol) OH NO 2 NO 2 O 2 N 0.1 - - - 504. 203-808-3 110-85-0 Piperazine (diethylenediamine XE “diethylenediamine”) NNH H 0.1 - 0.3 - 505. 110-89-4 Piperidine 0.2 506. 232-319-8 8003-34-7 Pyrethrins and pyrethroids (pyrethrum (purified from sensitising lactones)) Multicomponent insecticide of plant origin 1 - - - N H Translation © 2019 Valsts valodas centrs (State Language Centre) 69 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 507. 203-809-9 110-86-1 Pyridine N 15 5 - - 508. 123-75-1 Pyrrolidine 0.1 509. 231-116-1 04/06/7440 Platinum (metal) Pt 1 - - - 510. Polymer dust: (polyamide, polyformaldehyde, polycaprolactam, polyethylene, polymers in the basis of which there are acrylic monomers, polypropene, polyurethane etc.) 5 511. 107-19-7 Propargyl alcohol (2-Propyn-1-ol) 1 511.1 74-98-6 Propene CH3CH2CH3 1800 1000 512. 201-176-3 79-09-4 Propanoic acid (propionic acid) C2H5COOH 31 10 62 20 513. 109-60-4 Propyl acetate (acetic acid, propyl ester) CH3COOC3H7 200 514. 107-10-8 Propylamine (n-propylamine) NH2C3H7 5 515. 108-32-7 Propylene carbonate 2 N H CH C CH2OH O O CH 3 O Translation © 2019 Valsts valodas centrs (State Language Centre) 70 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) (1,2-Propanediol cyclic carbonate) 516. Propylene glycol monoacrylate CH2=CHCOO-CH2-CH2OH CH3 1 517. 57-55-6 propylene glycol (1,2-propanediol) CH3CH(OH)CH2OH 7 518. 75-56-9 Propylene oxide (methyloxirane, 1,2-epoxypropane) 1 519. 115-07-1 Propylene (propene) CH2=CH-CH3 100 520. 106-36-5 Propyl propionate (propionic acid propyl ester) CH3CH2COOC3H7 70 521. 71-23-8 Propyl alcohol (1-propanol) CH3CH2CH2OH 10 522. 123-38-6 Propionaldehyde (propanal) CH3CH2CHO 5 523. Dust of plant and animal origin: sugar dust 5 grain dust 4 cotton, linen, wool, piles etc. (with an admixture of silicon 2 4 O CH 3 Translation © 2019 Valsts valodas centrs (State Language Centre) 71 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) dioxide): * more than 10 % * less than 10 % flour dust 6 wood dust 6 peat dust 5 hardwood dust 5 paper dust 2 8037-19-2 tobacco dust 3 tea dust 3 524. Yeast (dry) 0.3 525. 203-585-2 108-46-3 Resorcinol (1, 3-dihydroxybenzene, benzene-1,3-diol) OH OH 45 10 - - Skin 526. 83-88-5 Riboflavin (vitamin B2) C17H20N4O6 1 527. 13292-46-1 Rifampicin (rimactane) 0.02 528. 111-20-6 Sebacic acid (1,8- octane dicarboxylic acid) HOOC(CH2)8COOH 4 529. 231-978-9 7783-07-5 Hydrogen selenide H2Se 0.07 0.02 0.17 0.05 530. 231-195-2 7446-09-5 Sulphur (IV) oxide (sulphur SO2 1.3 0.5 2.7 1 Translation © 2019 Valsts valodas centrs (State Language Centre) 72 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) dioxide) 531. 7446-11-9 Sulphur (VI) oxide (sulphuric anhydride, sulphur trioxide) SO3 1 532. 10025-67-9 Sulphur monochloride (disulphur dichloride) S2Cl2 0.3 533. 75-15-0 Carbon disulphide CS2 15 5 Skin; Auditory effect 534. 7704-34-9 Sulphur S 6 535. 7664-93-9 Sulphuric acid3 (mist defined as the thoracic fraction) H2SO4 0.05 536. 7783-06-4 Hydrogen sulphide H2S 7 5 14 10 537. Hydrogen sulphide mixed with hydrocarbons C1-C5 3 538. 7631-86-9 Silicon dioxide SiO2 1 539. 409-21-2 Silicon carbide SiC 6 540. 12033-89-5 Silicon nitride (trisilicon tetranitride) Si3N4 6 541. 12007-81-7 Silicon tetracboride (tetraboron silicide) SiB4 6 542. Silicon and copper alloy 4 543. Silicates and aluminosilicates: Translation © 2019 Valsts valodas centrs (State Language Centre) 73 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) abrasive dust 2 bauxite agglomerate 2 mica, phlogopite, muscovite, talc, talc type dust 4 artificial mineral fibres with silicate and aluminosilicate glassy structure (glass-fiber, glass-wool, slag and mineral wool etc.) 2 Mineral fibres, including rock wool, glass fibre 3 sol/cm3 air cement, apatite, clay 6 glassy silicates of volcanic origin (tuff, pemza, perlite) 4 zeolites (artificial and natural) 2 pottery 2 16389-88-1 dolomite 6 544. 77348-01-7 Sylvinite Cl2KNa 5 545. Synthetic detergents 5 546. 205-634-3 144-62-7 Oxalic acid (ethanedioic acid) HOOCCOOH 1 - - - 547. Mixture of dialkyl diesters of oxalic acid (dialkyloxalates) 0.5 COOR' COOR" R' un R" = C n H 2n+1 Translation © 2019 Valsts valodas centrs (State Language Centre) 74 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 548. 200-579-1 64-18-6 Formic acid (methanoic acid) HCOOH 9 5 - - 549. 233-272-6 10102-44-0 Nitrogen dioxide NO2 0.96 0.5 1.91 1 550. 233-271-0 10102-43-9 Nitrogen monoxide NO 2.5 2 – – 551. Nitrogen oxides, (after NO2) 5 552. 231-714-2 7697-37-2 Nitric acid HNO3 2 0.78 2.6 1 553. Fiber glass in the basis of which there is polyester resin 5 554. 100-42-5 Styrene (vinylbenzene) C6H5CH=CH2 10 30 Auditory effect 555. 57-92-1 Streptomycin (agrimycin, phytomycin) C21H39N7O12 0.1 556. 231-131-3 7440-22-4 Silver metal Ag 0.1 - - - 557. Silver soluble compounds After Ag 0.01 558. 57-68-1 Sulfadimidine (sulphamethazine, sulfodimesin, 4-amino-N-(4,6 dimethylpyrimidin-2-yl) benzenesulfonamide) 1 559. 57-67-0 Sulfaguanidine (sulfanilylguanidine, sulgin, 1 N N N H S O O NH 2 CH 3 CH 3 NH 2 S N O O H C NH 2 NH Translation © 2019 Valsts valodas centrs (State Language Centre) 75 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 4-amino-N (aminoiminomethyl) benzenesulfonamide) 560. 547-44-4 Sulfacarbamide H2N-C6H4-SO2NHC(O)NH2 1 561. 152-47-6 Sulfalene (4-Amino-N-(3 methoxypyrazin- 2-yl) benzenesulfonamide) 0.1 562. 651-06-9 Sulfametoxydiazine (5-methoxysulfadiazine, 4-amino-N-(5-methoxy-2 pyrimidinyl) benzenesulfonamide) 0.1 463. 80-35-3 Sulphamethoxypyridazine (sulphanilic acid 6-methoxy 3-pyridazinyl amide, 4-amino-N-(6-methoxy pyridazin-3-yl) benzenesulfonamide) 0.1 564. 63-74-1 Sulfanilamide (streptocide, 4-aminobenzenesulfonamide) 1 565. 72-14-0 Sulfathiazol (4-amino-N-(thiazol-2-yl) 1 N N N H S O O NH 2 O CH 3 N N O N H S CH 3 O O NH 2 N N N H S O O NH 2 O CH 3 SO2NH2 H2N SO2NH2 H2N Translation © 2019 Valsts valodas centrs (State Language Centre) 76 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) benzenesulfonamide, sulphanilic acid thiazol-2 ylamide, norsulfazole) 566. 222-995-2 3689-24-5 Sulfotep (tetraethyldithiopyrophosphat e, 1,2-dithiodiphosphoric acid, tetraethyl ester) C8H20O5P2S2 0.1 - - - Skin 567. 107-92-6 Butyric acid (butanoic acid) CH3(CH2)2COOH 10 568. 123-72-8 Butyraldehyde (butyraldehyde, butanal) CH3(CH2)2CHO 5 569. 57218-73-2 Lead hydrocyanate 0.005 570. 15748-73-9 Lead disalicylate (2-hydroxybenzoato-lead salt) (HOC6H4COO)2Pb 0.005 571. 7439-92-1 Lead and its inorganic compounds, (after lead) Pb 0.05 0.1 Auditory effect 572. Chamotte-graphite fireproof material 2 573. 1401-55-4 Tannin C76H52O46 1 574. 13494-80-9 Tellurium Te 0.01 575. 83-67-0 Theobromine (3,7-dimethylxanthine, 1 N N N CH3 O NH OCH3 S N N H S O O NH 2 Translation © 2019 Valsts valodas centrs (State Language Centre) 77 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 3,7-dihydro-3,7-dimethyl-1H purine-2,6-dione) 576. 58-55-9 Theophylline (1,3-dimethylxanthine, 3,7-dihydro-1,3-dimethyl-1H purine-2,6-dione) 0.5 577. 540-88-5 Tert-butyl acetate (sec-butylacetat, isobutyl acetate) CH3COOCH2CH2CH2CH3 200 577.1 1634-04-4 Methyl tert-butyl ether C5H12O 183.5 50 367 100 578. 9005-90-7 Essence of turpentine C10H16 300 579. 60-54-8 Tetracycline C22H24N2O8 0.1 579.1 201-083-8 78-10-4 Tetraethyl orthosilicate (ethyl silicate; tetraethoxysilane) (C2H5O)4Si 44 5 580. 78-00-2 Tetraethyl lead (C2H5)4Pb 0.005 581. 127-21-9 1,1,3,3-Tetrafluoro-1,3 dichloropropan-2-on (tetrafluoro-1,3 dichloroacetone) ClF2CCOCF2Cl 2 582. 76-37-9 2,2,3,3-Tetrafluoropropan-1 ol CHF2-CF2-CH2OH 20 N N N CH3 O N OH CH3 Translation © 2019 Valsts valodas centrs (State Language Centre) 78 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 583. 203-726-8 109-99-9 Tetrahydrofuran O 150 50 300 100 Skin 584. 79-34-5 1,1,2,2-tetrachloroethane CHCl2CHCl2 5 585. 25322-20-7 Tetrachloroethane (mixed isomers) C2H2Cl4 5 586. 204-825-9 127-18-4 Tetrachloroethylene (perfluoroethylene) C2Cl4 70 10 140 20 Skin 587. 200-262-8 56-23-5 Carbon tetrachloride (carbon tetracloride, tetrachlormethane) CCl4 6.4 1 32 5 Skin 588. 1401-69-0 Tylosin 1 589. 68-11-01 Thioglycolic acid HSCH2COOH 0.1 590. 62-56-6 Thiourea NH2CSNH2 0.3 591. 12039-13-3 Titanium disulphide TiS2 6 592. 25583-20-4 Titanium nitride TiN 4 593. 12039-83-7 Titanium disilicide TiSi2 4 594. 7440-32-6 Titanium Ti 10 595. 13463-67-7 Titanium dioxide TiO2 10 596. 95-53-4 o-toluidine CH3C6H4NH2 0.5 1 597. 108-44-1 m-toluidine CH3C6H4NH2 0.5 1 598. 106-49-0 p-toluidine CH3C6H4NH2 0.5 1 599. 584-84-9 2,4-toluene diisocyanate C9H6N2O2 0.05 Translation © 2019 Valsts valodas centrs (State Language Centre) 79 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) (methyl-m-phenylene diisocyanate, toluene-2,4-diisocyanate, m-tolylidene diisocyanate) 600. 203-625-9 108-88-3 Toluene (methylbenzol) CH3C6H5 50 14 150 40 Skin; Auditory effect 601. 49721-45-1 4,5,6-Triaminopyrimidine sulphate (pyrimidine-4,5,6-triamino sulphate) 2 602. 559-11-5 2,2,3,3,4,4,5,5,6,6,7,7,7 Tridecafluoroheptyl acrylate (acrylic acid 1H, 1H tridecafluoroheptyl ester, 2-propenoic acid 2,2,3,3,4,4,5,5,6,6,7,7,7 tridecafluoroheptyl ester) H2C=CHCOOCH2(CF2)5CF3 30 603. 204-469-4 121-44-8 Triethylamine (C2H5)3N 8.4 2 12.6 3 604. 204-428-0 120-82-1 1,2,4-trichlorobenzene Cl Cl Cl 15, 1 2 37, 8 5 Skin 605. 200-756-3 71-55-6 1,1,1-trichloroethane (methyl chloroform) CH3CCl3 555 100 1110 200 N N NH 2 NH 2 NH 2 x H 2 SO 4 Translation © 2019 Valsts valodas centrs (State Language Centre) 80 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 606. 461-18-7 4,4,4-Trifluoro-1-butanol CF3(CH2)3OH 20 607. 507-52-8 1,1,1-trifluoro-2-methyl propan-2-ol (CH3)2C(OH)CF3 20 608. 75-89-8 2,2,2-trifluoroethanol CF3CH2OH 10 609. 420-46-2 1,1,1-trifluoroethane (Freon 143) CH3CF3 3000 610. 76-05-1 1,1,1-trifluoroacetic acid CF3COOH 2 611. 25854-04-0 1,1,2-trichloro-1,3-butadiene Cl2C=CCl-CH=CH2 3 612. 75-87-6 Trichloroacetaldehyde (chloral) CCl3CHO 5 613. 76-03-9 Trichloroacetic acid CCl3COOH 5 614. 76-02-8 Trichloroacetic acid chloroanhydride CCl3COCl 0.1 615. 79-01-6 Trichloroethylene (trichloroethene) ClCH=CCl2 10 Auditory effect 616. 5329-12-4 2,4,6 trichlorophenylhydrazine 1 617. 96-18-4 1,2,3-trichloropropane ClH2C-CHCl-CH2Cl 2 618. 3278-46-4 2,2,3-trichloropropanoic acid (chloropon) ClCH2CCl2COOH 10 619. 96-19-5 1,2, 3-Trichloropropene ClHC=CCl-CH2Cl 3 620. 10025-78-2 Trichlorsilan, after HCl SiHCl3 1 Cl Cl Cl NHNH2 Translation © 2019 Valsts valodas centrs (State Language Centre) 81 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 621. 2077-46-5 2,3,6- trichlorotoluene 10 622. 208-394-8 526-73-8 1,2,3-trimethylbenzene CH 3 CH 3 CH 3 100 20 - - 623. 202-436-9 95-63-6 1,2,4-trimethylbenzene (pseudocumol) CH 3 CH 3 CH 3 100 20 - - 624. 118-96-7 2,4,6-trinitrotoluene (TNT) 0.1 0.5 625. 7440-61-1 Uranium, insoluble compounds U 0.075 626. 7440-61-1 Uranium, soluble compounds U 0.015 627. 57-13-6 Urea NH2CONH2 10 628. Urosulfane (sulfanilcarbamide) H2N-C6H4-SO2NHC(O)NH2 1 629. 1314-34-7 Vanadium trioxide dust (disintegration aerosol) V2O3 0.5 CH 3 Cl ClCl NO2 CH3 NO2O2N Translation © 2019 Valsts valodas centrs (State Language Centre) 82 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) (divanadium trioxide dust (disintegration aerosol) 630. 1314-62-1 Vanadium pentaoxide smoke (condensation aerosol) (divanadium pentaoxide smoke (condensation aerosol) V2O5 0.1 631. 7440-62-2 Vanadium and its compounds (ferro-vanadium (after vanadium)) V 1 632. Slag dust containing vanadium 4 633. 12019-57-7 Copper phosphide (tricopper phosphide) Cu3P 0.5 634. 147-14-8 Copper-phthalocyanine 5 635. 17836-27-0 Copper chromium phosphate, after CrO3 0.02 636. 20936-31-6 Copper salicylate (salycilic acid copper salt) Cu(C7H5O3)2 . 4H2O 0.1 637. 7758-89-6 Copper salt after copper (chloric acid, ch. acid, sulphuric acid etc.) (Cu) 0.5 638. 25267-55-4 Copper trichlorophenolate Cu(C6H2OCl3)2 0.1 639. 7440-50-8 Copper Cu 0.5 1 640. 88-12-0 1`-Vinyl-2-pyrrolidone (N-Vinylpyrrolidone) 1 N O CHH2C Translation © 2019 Valsts valodas centrs (State Language Centre) 83 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) 641. 108-05-4 Vinyl acetate (acetic acid, vinyl ester) CH3COOCH=CH2 17.6 5 35.2 10 642. 689-97-4 Vinyl acetylene (1-butene-3-yne) HCCCHCH2 20 643. vinyl-phosphonicacid dichloro ethyl ester CH2=CHP(O)(OCH2CH2Cl)2 0.6 644. 200-831-0 75-01-4 Vinyl chloride monomer (chloroethylene) CH2=CHCl 7.77 3 - - 645. Polymers of vinyl chloride and vinylidene chloride 10 645.1 200-864-0 75-35-4 Vinylidene chloride (1,1 dichloroethylene) C2H2Cl2 8 2 20 5 646. 100-69-6 2-vinylpyridine 0.5 647. 12070-12-1 Tungsten carbide WC 6 648. 12039-88-2 Tungsten disilicide WSi2 6 649. Tungsten-cobalt alloy with diamond admixture up to 5% 4 650. Vulcanisation gases which arise in tyre manufacturing and in the production of other 0.5 N CH CH2 Translation © 2019 Valsts valodas centrs (State Language Centre) 84 No. EINECS1 CAS2 Name of the substance (including synonyms) Structural formula/sum formula Occupational Exposure Limit Values (OEV) Notes 8 h Short-term (15 min.) mg/m³ ppm (ml/m3) mg/m³ ppm (ml/m3) rubber articles 651. 81-81-2 Zoocoumarin (warfarin, 3-(α-acetonylbenzyl)-4 hydroxycoumarin, (R)-4-hydroxy-3-(3-oxo-1 phenyl-butyl)-2-benzopyrone, (S)-4-hydroxy-3-(3-oxo-1 phenyl-butyl)-2-benzopyrone) 0.001 Notes: 1 – EINECS – the substance number in the European Inventory of Existing Chemical substances; 2 – CAS - Chemical Abstract Service Number – the registration number of the substance in the reference publication Chemical Abstract; 3 –When selecting an appropriate exposure monitoring method, account should be taken of potential limitations and interferences that may arise in the presence of other sulphur compounds. 4 – Short-term exposure limit regarding the base time period of one minute. 5 – Inhalable fraction. 6 – Fraction which may enter into the respiratory tract. Acting for the Minister for Welfare, Minister for the Environment R. Vējonis O CH C6H5OH O CH2 CO CH3 In Revised Version Submitted by the Ministry of Welfare Annex 2 Cabinet Regulation No. 325 15 May 2007 Synonyms of Chemical Substances and Numbers Corresponding to Substances [1 February 2011; 7 April 2015; 10 July 2018] No. of the synonym of the substance Synonyms of chemical substances No. of the substance in Annex 1 1. abrasive dust 543 2. 3- acetylanisole 443 3. 3- acetylmethoxybenzene 443 4. 2- acetoxybenzoic acid 3 5. 3-(α- acetonylbenzyl)-4- hydroxycoumarin 651 6. adipic acid dibutyl ester 165 7. adobacillin 69 8. agrimycin 555 9. acrylaldehyde 17 10. acryloilchloride 16 11. acrylic acid 1H, 1H- tridecafluoroheptyl ester 602 12. acrylic acid 2-ethoxyethyl ester 248 13. acrylic acid ethyl ester 233 14. acrylic acid, heptyl ester 305 15. acrylic acid methyl ester 419 16. acrofol 459 17. alkanes 495 18. alkyl amines 31 19. aluminium oxide with silicon dioxide admixture 369 20. amidopyrin 252 21. 1- amino-propane-1,3-dicarboxylic acid 47 22. 4- amino-1-methoxybenzene 73 23. 2- amino-3-(4-imidazolyl) propanoic acid) 48 24. 2- amino-3-(2-amino-2 carboxyethyldisulfanyl)propanoic acid) 44 25. 2- amino-3-(3-imidazolyl) propanoic acid) 58 26. 2- amino-3-(4-hydroxyphenyl) propanoic acid 56 27. 4- amino-3, 5, 6- trichloropyridine-2-carboxylic acid 32 28. 2- amino-3-phenyl-propanoic acid 45 29. 2- amino-3-guanidinovaleric acid 41 30. 2- amino-3-hydroxy-butanoic acid 57 31. 2- amino-3-hydroxypropanoic acid 55 32. 2- amino -3-mercaptopropionic acid 43 33. 2- amino-3-methyl-butanoic acid 59 34. 2- amino-3-methyl-pentanoic acid 49 35. 2 – amino-4-methylmercaptobutyric acid 52 36. 2- amino-4-methyl-pentanoic acid 50 37. aminobenzylpenicillin 69 38. aminobenzene 72 39. 4- aminobenzenesulfonamide 564 40. α - amino- β -phenylpropionic acid 45 41. α - amino- β -mercaptopropionic acid 43 42. α - amino- β -.-methylvaleric acid 49 43. 2- aminosuccinic acid 42 44. 2- aminobenzoate 108 45. aminoacetic acid 46 46. aminophenylmethyl-penicillin 69 47. α - amino-g-methylthiobutyric acid 52 48. α - aminoisocaproic acid 50 49. ε- aminocaproic acid lactam 366 50. 4- Amino-N-(3-methoxypyrazin-2-yl) benzenesulfonamide) 565 51. 4- amino-N-(4,6-dimethylpyrimidin- 2-yl) benzenesulfonamide 558 52. 4- amino-N-(5-methoxy-2-pyrimidinyl) benzenesulfonamide 562 53. 4- amino-N-(5-ethyl-[1,3,4]thiadiazol-2-yl) benzenesulfonamide 229 54. 4- amino-N-(6-methoxy-pyridazin-3-yl) benzenesulfonamide 563 55. 4- amino-N-(aminoiminomethyl) benzenesulfonamide 559 56. 4- Amino-N-(thiazol-2-yl)-benzenesulfonamide 565 57. 2- aminopropanoic acid 40 58. 3- aminopropanoic acid 18 59. α- aminopropionic acid 40 60. ammonium hydrofluoride 270 61. ammonium hydrogen phosphate and dihydrogen phosphate mixture 60 62. ammonium thiocyanate 64 63. antihelmycin 310 63.1 p-anisidine 73 64. apatite 543 65. aziridine 241 66. barium hydrogen phosphate 86 67. barite 89 68. benzal chloride 98 69. benzyl cyanide 253 70. benzo[def]chrysene 94 71. p- benzoquinone 102 72. 1.3- benzenedicarboxylic acid 337 73. 1.2- benzenedicarboxylic acid anhydride 281 74. 1.2- benzenedicarboxylic acid, di-2-propenyl ester 161 75. 1.2- benzenedicarboxylic acid, dialkyl esters 162 76. 1.2- benzenedicarboxylic acid, dibutyl ester 167 77. 1.2- benzenedicarboxylic acid, diethyl ester 173 78. 1.2- benzenedicarboxylic acid, dimethyl ester 202 79. 1.4- benzenedicarboxylic acid, dimethyl ester 206 80. 1.2- benzenedicarboxylic acid, dinonyl ester 215 81. 1.2- benzenedicarboxylic acid, diisobutylester 191 82. 1.3- benzene-1,3-diol 525 83. benzoic acid chloroanhydride 103 84. 2,2'- bipyridine and 4,4'-bipyridine 113 85. bis(2-ethylhexyl) sebacate 217 86. bis-azepan-1-ylmethanone 221 87. bisphenol A 341 88. bis-N,N'-hexamethylene urea 221 89. bauxite agglomerate 543 90. boron trifluoride 117 91. DL- Bornan-2-one 365 92. 1- Bromo-3-nitrobenzene 486 93. 1- bromobutane 131 94. bromoethane 236 95. bromomethane 420 96. butyraldehyde 568 97. butanal 568 98. 1.4- butanedicarboxylic acid 7 99. 1.4- butane dicarbonic acid dibutyl ester 165 100. 1.4- butanedicarboxylic acid monoethylester 8 101. 1- butanol 137 102. 2- butanol 137 103. n- butanol 137 104. butanoic acid 567 104.1 butanedione 160.1 105. 3- butene-2-one 438 106. 1- butene-3-yne 642 107. butyl cellosolve 139 108. butyl glycol acetate 140 109. butyl diglycol 141 109.1 1,4-butynediol 127.1 110. cephalosporin N 142 111. cephalosporin P 142 112. cement 543 113. cyanobenzene 106 114. 2- cyanoethanol 309 115. cyanoethylene 11 116. cyanomethane 1 117. hardwood 523 118. p- cymol 154 119. zineb 155 120. cis-3-Chloroacrylic acid sodium salt 459 121. cis-3-Chloropropenoic acid, sodium salt 459 122. DBP 167 123. p,p’- DDT (4,4'-DDT) 370 124. decanedioic acid dibutyl ester 169 125. decanedioic acid dimethyl ester 203 126. 1- decanol 160 127. demeton 407 128. desflurane 71 129. dialkyloxalates 547 130. 1.2- diaminoethane 238 131. 1.6- diaminohexane 298 132. 2,6– diaminohexanoic acid 51 133. α, ε - diaminocaproic acid 51 134. diammonium hydrogen orthophosphate 60 135. diboron trizinc hexaoxide 157 136. dibromomethane 427 137. diethyl 1,4-dihydro-2,6-dimethylpyridine-3,5 dicarboxylate 193 138. diethylenediamine 504 139. diethyl ((phenylthio)methyl)phosphonate) 307 140. O,O’- diethyl-O’’-(2-ethylthioethyl) thiophosphate and O,O’-diethyl-S-(2-ethylthioethyl) thiophosphate 407 mixture 141. diphacinone 174 142. 2- diphenylacetyl-1,3-Indandion 174 143. diphenyl 112 144. difluorochlorobromomethane 121 145. diphosphorus pentasulphide 276 146. diphosphorus pentaoxide 274 147. 3.7- dihydro-1,3-dimethyl—1H-purine-2,6-dione 575 148. 3.7- dihydro-3,7-dimethyl—1H-purine-2,6-dione 576 149. 1,3– dihydroxybenzene 525 150. 2,2' dihydroxydiethyl ether 171 151. m- dichlorobenzol 183 152. o- dichlorobenzol 182 153. p- dichlorobenzol 184 154. dichloro-diphenyl-trichloroethane (DDT) 370 154.1 1,1-dichloroethylene 645 155. 1.2- dichloro-1-fluoro-ethane 267 156. dichloromethane 428 157. dichloromethylbenzene 98 158. α, α - dichlorotoluene 98 159. dichromates 334 160. diludine 193 161. N,N- dimethyl-2-hydroxyethylamine 195 162. 2.2- Dimethyl-3-(2-methyl-1-propenyl) cyclopropane 1-carboxylic acid) 382 163. 2.6- dimethyl-3,5-diethoxycarbonyl-1,4 dihydropyridine 193 164. 2.3- dimethylacrylic acid 415 165. 3.3- dimethylacrylic acid ethyl ester 416 166. α, α - dimethylbenzylhydroperoxide 251 167. 1.2- dimethylbenzene 386 168. 1.3- dimethylbenzene 385 169. 1.4- dimethylbenzene 387 170. dimethylbenzene 384 170.1 dimethyl diketone 160.1 171. N,N- dimethylethanolamine 195 172. N,N- dimethylphenylamine 196 173. 1.3- dimethylxanthine 576 174. 3.7- dimethylxanthine 575 175. O,O’- dimethyl-O’’-(2-ethylthioethyl) thiophosphate and dimethyl-S-(2-ethylthioethyl) thiophosphate mixture 433 176. 2.2- dimethylvinylcarbinol 414 177. 2.4- dinitrochlorobenzene 314 178. 4.6- dinitro-o-cresol 426 179. 2,2'- dipyridyl and 4,4'-dipyridyl 113 180. dipropylene glycol monomethyl ether 441 181. disulphur dichloride 532 182. [10 July 2018] 183. 3,3’- dithiobis-2-aminopropanoic acid 44 184. 1.2- dithiodiphosphoric acid, tetraethyl ester 566 185. divanadium pentaoxide smoke 630 186. divanadium trioxide dust 629 187. DNOC 426 188. dodecan-1-ol 220 189. dolomite 543 190. DPM 441 191. yellow prussiate of potash 358 192. iron agglomerate 223 193. baking soda 461 194. electro-corundum 22 195. enflurane 71 196. 1.2- epoxypropane 518 197. 2- propenoic acid 2-ethoxyethyl ester 248 198. ethanal 2 199. N,N’- ethanediylbis-dithiocarbamic acid zinc salt 155 200. 1.2- ethanediol 239 201. ethanedioic acid 546 202. ethanol 246 203. acetic acid 3-methylbutyl ester 335 204. acetic acid, benzyl ester 96 205. acetic acid, methyl ester 418 206. acetic acid, propyl ester 513 207. acetic acid, vinyl ester 641 208. ethyl –[[3-[2-(diethylamino)ethyl]-4-methyl-2-oxo 2H-1-benzopyran-7-yl]oxy]acetate hydrochloride 368 209. crotonic acid, 3-methyl-, ethyl ester 416 210. ethyl acetate 232 211. ethylbutylcetone 304 212. 1.2- ethylendicarbonic acid anhydride 400 213. ethylene glycol dimethyl ether 207 214. ethyleneglycol monobutyl ether acetate 140 215. ethyleneglycol monobutyl ether 139 216. ethylene glycol monoethyl ether 237 216.1 2-ethyl-1-hexanol 243.1 217. 2- ethylhexyl acrylate 14 217.1 2-ethylhexyl alcohol 243.1 218. ethylsoamykeltone 423 219. ethyl mercaptan 228 220. ethylmethylketone 126 221. O- ethyl O-phenyl S-propyl phosphorothioate 307 221.1 ethyl silicate 579.1 222. 2- ethoxyethanol 237 223. phenibute 33 224. [(2- phenyl-1,5-dimethyl-3-oxo-2.3-dihydro-1H pyrazol-4-yl)-methyl-amino] methan esulfonate 70 225. 6- phenylacetamido penicillinic acid sodium salt 99 226. phenylamine 72 227. 2- phenylazomalononitrile 254 228. N,N’-(m- phenylene) disuccinimide 258 229. 1,1-(1,3- phenylene)bis(1H-pyrrole-2,5-dione) 258 230. 1.2- phenylenediamine 256 231. 1.3- phenylenediamine 255 232. 1.4- phenylenediamine 257 232.1 Phenylene ether 175.1 233. phenylhydrazonomalononitrile 254 234. phenylcarbinol 100 235. phenylmethanol 100 236. phenyl methyl ketone 4 237. 2- phenylpropene 436 238. phenmedipham 111 238.1 Phenoxybenzene 175.1 239. 3- phenoxyphenol 262 240. ferro-vanadium 631 241. phytomycin 555 242. phlogopite 543 243. formaldehyde dimethylacetal 208 244. 2- formylfuran 288 245. phosphorus pentachloride 273 246. phosphorus pentaoxide 274 247. phosphoryl trichloride 275 248. phosphoric acid, dibutyl phenyl ester 166 249. freon 11 268 250. freon 12 177 251. freon 12 Br 121 252. freon 13 B1 124 253. freon 141 267 254. freon 142 179 255. freon 143 609 256. freon 152 178 257. freon -112 176 258. 2- furancarboxaldehyde 288 259. germanium (IV) oxide 292 260. germane 293 261. glutamic acid 5-lactam 53 262. glutaric acid dialdehyde 294 263. grain dust 523 263.1 gypsum dust 353.1 264. halotan 71 265. hexachloropropanone 295 266. 1.6- hexanediamine 298 267. 1.6- hexamethylene diisocyanate 299 268. hexanedioic acid dibutyl ester 165 269. hexanoic acid 367 270. heptanol 306 271. herban 289 271.1 hydrogenated diphenylbenzenes 308.1 272. 2- hydroxy-2-methylpropionitrile 5 273. (R)-4- hydroxy-3-(3-oxo-1-phenyl-butyl))-2-benzopyrone 651 274. (S)-4- hydroxy-3-(3-oxo-1-phenyl-butyl))-2-benzopyrone 651 275. 7-[2- hydroxy-3-(N-(2-hydroxyethyl), -N-methylamino] propyl) theophylline nicotinate 383 276. hydroxybenzene 264 277. 2- hydroxybenzoato-lead salt 570 278. 2- hydroxyethyl acrylate 15 279. 3-(4- hydroxyphenyl)alanine 56 280. α- hydroxyisobutyronitrile 5 281. 2- hydroxymethylfuran 287 282. 1- hydroxynaphthalene 456 283. 2- hydroxynaphthalene 457 284. 3- chloro-1,2-epoxypropane 226 285. 1- chloro-3-hydroxypropane 312 286. chloroacetyl chloride 447 287. chloral 612 288. picloram 32 289. 1- chlorobutane 133 290. chloroethane 244 291. chloroacetic acid 446 292. chloroethylene 644 293. chloromethane 429 294. chloropon 618 295. chloropelargonic acid 319 296. α - chloropropionic acid 322 297. α - chlorotoluene 97 298. homopiperidine 300 299. chromium orthophosphate 328 300. chromium trioxide 329 301. chromium-ammonium alum 333 302. intencordin 368 303. Iintensain 368 304. slag and mineral wool 543 305. isoamyl methyl ketone 422 306. isobutyl acetate 577 307. isobutyl acetone 422 308. isobutyl methyl ketone 424 309. iso-butyl alcohol 137 310. isoflurane 71 311. [7 April 2015] 312. isopentyl acetate 335 313. isopentyl methyl ketone 422 314. isopropylbenzene 250 315. isopropyl acetate 424 316. isopropylbenzene hydroperoxide 251 317. isopropylbenzene 388 318. isopropyl alcohol 340 319. 2- isopropyltoluene 154 320. 3- isopropyltoluene 154 321. 4- isopropyltoluene 154 322. calcium dihydroxide 348 323. dipotassium hexafluorosilicate 357 324. potassium O- alkyldithiocarbonate 354 325. Carbonic acid, dithio-, O-butyl ester 355 326. Potassium O-ethyl dithiocarbonate 356 327. carbamonitrile 148 328. carbathione 466 329. carbinol 413 330. carboxide (pesticide) 221 331. 1- carboxymethyl pyridinium betaine 111 332. carbonyl dichloride 280 333. caustic soda 462 334. pottery 543 335. cresol mixture 381 336. trisodium hexafluoroaluminate 270 337. 2.6- xylenol 200 338. o-,m-,p- xylene 384 339. cumyl hydroperoxide 251 340. cumene hydroperoxide 251 341. cumolhydroperoxide 198 342. cuprozan 155 343. white spirit 393 344. lauryl alcohol 220 345. luminophores P – 385 84 346. magnesium dodecaboride 398 347. maleinanhydride 400 348. clay 543 349. maneb 404 350. methacrylic anhydride 410 351. methacrylic chloride 411 352. methanal 271 353. methanoic acid 548 354. 2- metyl-1,3-butadiene 339 355. 3- metyl-1-butanol 336 356. 1- methyl-1-ethanol 340 357. 2- Methyl-propan-1-ol 137 358. 3- methyl-2-butanol 431 359. methyl 2-methylpropenoate 434 360. N- Methyl2-pyrrolidone 425 361. 2- Methyl-propan-2-ol 137 362. methyl-amyl-ketone 303 363. methylal 208 364. methylbenzol 600 365. 3- methyl-1-butyl acetate 335 366. 1- methylbutyl ethanoate 421 366.1 demeton-methyl 433 367. methyldithiocarbamate 466 368. methyldithiocarbamic acid, sodium salt 466 369. methylethylketone 126 370. o-, m-, p- methylphenols 381 371. methyl chloroform 605 372. methylisobutylketone 424 373. 2- Crotonic acid, 2-methyl- 415 374. methyl mercaptan 412 375. 4- methyl-m-phenylene diisocyanate 599 376. methyloxirane 518 377. methyl pentyl ketone 303 378. 4- methylpiperazine-1amine 34 379. 3-(1- Methyl-2-pyrrolidinyl) pyridine 474 380. methyl propenoate 419 381. 2- methylpropionic acid 409 382. 2- methylpropenoic acid anhydride 410 383. 2- methylpropionic acid amide 408 384. 2- propenoic acid, 2-methyl-, butyl ester 135 385. 2- methylpropenoic acid chloroanhydride 411 386. 2- methyl-2-propenoic acid methyl este 433 387. methyl alcohol 413 388. α- methylstyrene 250 389. N- Methylurea 437 390. 1- methoxy-4-nitrobenzene 484 391. 4- methoxyaniline 73 392. 5- methoxysulfadiazine 562 393. monoethanolamine 35 394. monochlorbenzene 317 395. monopropylene glycol methyl ether 442 396. muscovite 543 397. petroleum 393 398. 2- naphthenic acid 453 399. α - naphthol 456 400. β naphthol 457 401. sodium 3-chloroacrylate 459 402. soda lye 462 403. sodium thiocyanate 470 404. n-butyl acetate 231 405. inorganic chromium (II) compounds 327 406. inorganic chromium (III) compounds 327 407. nicotinamide 476 408. N-(5- Nitro-2-furfurylidene)-1-aminohydantoin 284 409. m- nitroaniline 482 410. o- nitroaniline 481 411. p- nitroaniline 483 412. nitrofural 282 413. nitrofurantoin 283 414. 3-(5- nitrofurfurylidenamino)-2-oxazolidinone 286 415. 5- nitrofuranyl semicarbazone 282 416. N-[2-(5’- nitrofuryl-2)-2-propenylidine]-1-amino-hydantoin 284 417. N-[(5’- nitro-2’-furyl)acrylidene]-1-aminohydantoin 284 417.1 nitroglycerin 293.1 418. nivalin 289 419. nonanol 491 420. norsulfazole 565 421. nururon 289 422. carbon disulphide 533 423. carbon monoxide 493 424. carbon tetrafluoride 587 425. 2,2' oxybisethanol 171 426. oxirane 242 427. 2,2,3,3,4,4,5,5 octafluoropenthyl acrylate 13 428. octan-1,8-dicarboxilic acid dioctyl ester 217 429. 1.8- octane dicarboxylic acid 528 430. 1.8- octane-1,8-dicarboxylic acid dimethyl ester 203 431. octanol 497 432. orthoboric acid barium salt 83 433. orthophosphoric acid 278 434. pemza 543 435. 3-Penten-3-ol 414 436. pentacarbonyliron 222 437. 1.5- pentanedial 294 438. 1- pentanol 30 439. pentanoic acid 79 440. 3- pentyl acetate 26 441. pentyl acetate 25 442. pentyl bromide 28 443. 3- pentyl ethanoate 26 444. pentyl ethanoate 25 445. pentyl formate 29 446. perhydroazepine 300 447. perchloroethylene 586 448. perlite 543 449. petroleum ether 392 450. polyethylene 510 451. piramidon 252 452. pyrethrum 506 453. 1- pyridylacetic acid betaine 111 454. pyridine-3-carboxylic acid 475 455. pyridine-3-carboxylic acid amide 476 456. pyrimidine-4,5,6-triamino sulphate 601 457. pyrrolidone-5-carboxylic acid 53 458. 2- pyrrolidone carboxylic acid 54 459. polyamide 510 460. polyethylene terephtalate 389 461. polyformaldehyde 510 462. polycaprolactam 510 463. polypropylene 510 464. polysaccharide 390 465. polyurethane 510 466. Portland cement 144 467. propanal 522 468. 1.2- Propanediol cyclic carbonate 515 469. 1.2- propanediol 517 470. 1- propanol 521 471. 2- propanol 342 472. 2- propanone 6 473. 2- propanol, dimethyl ketone 6 474. propionic acid propyl ester 520 475. 2- propene-1-ol 19 476. 2- prop-2-enal 17 477. propenoyl chloride 16 478. propene 519 479. propenoic acid 12 480. 2- propenoic acid 2,2,3,3,4,4,5,5,6,6,7,7,7 tridecafluoroheptyl ester 602 481. 2- propenoic acid 2,2,3,3,4,4,5,5-octafluoropenthyl ester 13 482. 2- propenoic acid 2-ethylhexyl ester 14 483. propenoic acid 2-hydroxyethyl ester 240 484. propenoic acid amide 10 485. 2- propenoic acid ethyl ester 233 486. propenoic acid, heptyl ester 305 487. propenoic acid, methyl ester 419 488. n- propylamine 514 489. propylbenzene 388 490. propylene glycol monomethyl ether acetate 441 491. propylene glycol monomethyl ether 442 492. propylene chlorohydrin 315 493. 2- propyn-1-ol 511 494. propionic acid 512 495. pseudocumol 623 496. dust of plant and animal origin 523 497. dust, sugar 523 498. dust, wood 523 499. cotton, linen, wool, piles, and peat dust 523 500. dust, flour 523 500.1 carbon, coal, diamond dust 494 501. dust, paper 523 501.1 polymeric materials (polyethylene, polypropylene etc.) dust 510 501.2 silicate and aluminosilicate dust 543 502. dust, tobacco 523 503. dust of talc type 523 504. tea dust 523 505. ratindan 174 506. rimactane 527 507. salycilic acid cupric salt 636 508. red prussiate of potash 359 509. sebacic acid dibutyl ester 169 510. sebacic acid, dimethyl ester 203 511. sebacic acid dioctyl ester 217 512. sec-butylacetat 577 513. sulphur dioxide 530 514. sulphur trioxide 531 515. sulphuric anhydride 531 516. sevoflurane 71 516.1 formic acid methyl ester 421.1 517. formic acid pentyl ester 29 518. glass fibre 543 519. glass wool 543 520. streptocide 564 521. sulfodimesin 558 522. sulfaethylthiadiazole 229 523. sulfaethidiole 229 524. sulphamethazine 558 525. sulfanilylguanidine 559 526. sulphanilic acid 6-methoxy-3-pyridazinyl amide 563 527. sulphanilic acid thiazol-2-ylamide 565 528. sulfanilcarbamide 637 529. sulgin 559 530. talc 543 531. theophylline + 1,2 ethylenediamine 225 532. tert-butanol 137 533. tert-pentyl acetate 27 534. tert-Pentyl hydroperoxide 417 535. terylene 389 535.1 tetraethoxysilane 579.1 536. tetraboron silicide 541 537. tetraethyldithiopyrophosphate 566 538. tetrafluoro-1,3-dichloroacetone 581 539. tetrachlorodifluoroethane 176 540. tetracarbonyl nickel 479 541. tillam 245 542. TNT 624 543. m- tolylene diisocyanate 599 544. toluene-2,3- diamine 163 545. toluene-2,4-diisocyanate 599 546. tordon-22k 32 547. triacylglycerol 394 547.1 1,2,4-triazol-3-amine 30.1 548. trizinc diphosphide 156 549. trifluorobromomethane 124 550. 1,1,1- bis-(4-chlorophenyl)-2,2,2,-trichloroethane 370 551. trichloroethene 615 552. trichloromethane 320 553. tricarbonyl (methylcyclopentadienyl) manganese 403 554. trimellitic acid 105 555. 1,3,5- trimethylbenzene 445 556. 1,7,7- trimethylbicyclo(2,2,1)heptan-2-one 365 557. trimethylene chlorohydrin 312 558. 1,3,7- trimetylxanthine 375 559. 2,4,6- trinitrophenol 503 560. trisilicon tetranitride 540 561. tricopper phosphide 633 562. tuff 543 562.1 carbon monoxide gas 493 563. white spirit 393 564. warfarin 651 565. vinylbenzene 554 566. vinylbenzene 435 567. N- vinylpyrrolidone 640 568. vinyltoluene 435 569. vitamin B2 526 570. mica 543 571. hydrocyanic acid 149 Acting for the Minister for Welfare, Minister for the Environment R. Vējonis In Revised Version Submitted by the Ministry of Welfare Annex 3 Cabinet Regulation No. 325 15 May 2007 Biological Limit Values 1. The BLV of lead (Pb): 1.1. in blood is 40 µg Pb/100 ml (reference value – lead concentration in blood of population not subject to occupational exposure <10 µg/100 ml). A repeat blood test shall be carried out in two months if the lead level is 40-60 µg/100 ml. If the lead level is >60µg/100 ml, transfer to work where there is no contact with lead, health care and a repeat control of Pb level are required; 1.2. clinical blood picture, reticulocytes and punctate graininess of basophils in erythrocytes; 1.3. coproporphyrin in urine –100 µg/g of creatinine (reference value 22-57µg/g of creatinine); 1.4. aminolevulinic acid in urine – 5 mg/g of creatinine (reference value 0.5-2.5 mg/g of creatinine). 2. The BLV of mercury (Hg): 2.1. in blood is 15 µg Hg/l (reference value for the mercury concentration in blood of population not subject to occupational exposure < 1µg/l); 2.2. in urine is 35 µg Hg/g creatinine or 50 µg Hg/l (reference value for the mercury concentration in urine is < 5 µg Hg/g creatinine or 3.5 µg/l. 3. The BLV of cadmium (Cd): 3.1. in blood is 5 µg Cd/l (reference value for the cadmium concentration in blood of population not subject to occupational exposure (non-smokers) <1µg/l); 3.2. in urine is 5 µg Cd/g creatinine or 6 µg/l (reference value for the cadmium concentration in urine of population not subject to occupational exposure (non-smokers) < 0.5µg/l). 4. The BLV of chrome (Cr) in urine is 10µg Cr/g creatinine when changing during a shift (a reference value of the total chromium concentration in blood of population not subject to occupational exposure < 0.5µg/l, in urine – < 0.5µg/l). 5. Metabolites and/or the following chemical substances shall be determined to organic solvents (benzene, toluene, styrene): 5.1. to benzene – phenol shall be determined in urine at the end of the shift (BLV 25µg/g of creatinine); 5.2. to toluene – hippuric acid shall be determined in urine (BLV 1.6 g/g creatinine), in blood – toluene (BLV 0.05mg/g) at the end of the shift; and 5.3. to styrene – mandelic acid shall be determined in urine (BLV 0.8 g/g creatinine), in blood – styrene (BLV 0.55 mg/g) at the end of the shift. 6. The activity of cholinesterase in erythrocytes shall be determined to phosphorus organic compounds, BLM 70% of the base level. Acting for the Minister for Welfare, Minister for the Environment R. Vējonis In Revised Version Submitted by the Ministry of Welfare Annex 4 Cabinet Regulation No. 325 15 May 2007 Determination of Concentration of a Chemical Substance in the Air of the Working Environment 1. Samples shall be taken in the more characteristic workplaces. Performing the same work operation with similar tools, the air of the working environment shall be controlled by the sampling principle of workplaces, choosing them both in the centre of the room and at the sides of the room. 2. The air for analysis shall be taken during the working process (in typical work conditions) in the zone of breathing of the employee – in the hemisphere of the part of the room within 0.3 m radius, which embraces the face of a human with a centre in the middle between the eyes and the centre of which is situated on the line which goes through the middle of the head and larynx. 3. During the shift or during a separate stage of the technological process at one workplace (point) at least three samples shall be taken for the assessment of exposure; in determining aerosols of fibrogenic effect, one sample is permissible. 4. Calibrated accurate instrumental analytical measuring equipment shall be used for sampling and analysis. 5. If the gas and vapour concentration (Cg) is expressed in measurement units independent from temperature and air pressure ppm, then taking into account the molar weight of the substance [vielas molmasa] and the capacity taken by the mol of the gaseous substance at the relevant temperature, the concentration of the mass of the gaseous chemical substance (C, mg/m3) shall be calculated in accordance with the following formulae: C(mg / m3) = molar weight of the substance x Cg(ppm), at 20°C 24.04 C(mg / m3) = molar weight of the substance x Cg(ppm), at 25°C 24.44 6. Expressing the concentration of the mass of the gaseous chemical substance (C, mg/m3) as the gas and vapour concentration (Cg) in measurement units independent from temperature and air pressure ppm, the following recalculation formulae shall be used: Cg(ppm) = 24.04 x C(mg / m3), at 20°C molar weight of the substance Cg(ppm) = 24.44 x C(mg / m3), at 25°C molar weight of the substance 7. The concentration of the chemical substance for the shift shall be determined in the following way: 7.1. one or several consecutive air samples shall be taken during the eight hour working day or during a shift (the amount of air of the working environment, which is taken for analysis in order to measure the concentration of dangerous substances in the air sample taken), in which the necessary analyses are performed; 7.2. sampling shall be performed using individual air receivers (devices which receive air at the respiration area of the employee), during the shift or the average indicator is determined after the results of analysis taken separately during the shift; 7.3. in determining the average indicator by the results of analysis taken separately during the shift, it shall be calculated as the average for a time period, when the employee performs all the operations of the technological process; and 7.4. the calculations of the concentration shall be performed in accordance with the following formula: , where: Cmaiņā – indicates the average arithmetical concentration of the chemical substance during the shift, mg/m3; Ci, C1,C2 …Cn- the concentration of the dangerous chemical substance in time periods of separate stages of the technological process (operations) , mg/m3 during the shift; ti, t1 , t2, tn – the duration of separate stages (operations) of the technological process – the corresponding exposure time, expressed in hours ∑ti – the duration of the whole shift in hours, for example, 8 hours; 7.5. the assessment of the working environment shall cover at least 75% of the duration of a shift and it shall be performed during several work shifts. 8. Specification of the concentration of the chemical substance in the samples obtained during the performance of measurements shall be carried out in accordance with the method used in a certain case and the measurement instrument and the results obtained shall be compared with OEV. 9. In determining the concentration of dangerous chemical substances: 9.1. the methodology and measurement instruments for specification of chemical substances shall ensure specific substance specification even if other substances are present in the working environment at least at 0.1 OEV level (for specification of the approximate concentration 0.5 OEV level is permissible); 9.2. the total error of the concentration of the chemical substance may not exceed ± 25%; and 9.3. the result of the measurement of the chemical substance concentration shall be applied to circumstances where the air temperature is 20 0C (293 K) and ambient pressure 760 mm Hg (101,23 kPa). 10. Specification of the approximate concentration of chemical substances with indication tubes and other indicative measurement instruments shall be performed in accordance with the information provided by the manufacturer, including operating instructions, taking into account the presence of other substances in the air of the working environment at the same time and the possible effect thereof on the results of measurements; 11. Quick operation gas analysers shall be used for continuous automated control of dangerous substances of quick exposure in the working environment. 12. If the result below the detection limit of the method (the minimum concentration of the chemical substance, which may be detected using this method) is obtained during measurements, it shall be considered that the concentration of the chemical substance to be determined is a half of the concentration of such chemical substance, which is specified as a detection limit of a particular method. Acting for the Minister for Welfare, Minister for the Environment R. Vējonis