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April 23, 2024

According to Decree 280-2024 published on February 28, 2024, in the Gazette officielle du Québec, the amendment to the Appendix 1 of the Regulation respecting occupational health and safety (RSST, RLRQ, c. S-2.1, r. 13) will come into force on March 14, 2024. These regulatory changes have not yet been incorporated into the current Substance Data Sheets of the Sampling Guide for Air Contaminants in the Workplace. An update is currently underway and will be available as soon as possible. Consequently, the information contained in the data sheets of substances modified or added in Decree 280-2024 is partially inaccurate or incomplete. Please consult our infoLABO (in French only) for more details. Please contact our client service: [email protected] for further information.

Maleic anhydride(IFV)

French name in the regulation: Anhydride maléique(IFV)
CAS : 108-31-6

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)
ppm mg/m3 f/cc Notes
TWAEV - 0,01 - IFV
STEV - - - -
Ceiling - - - -
Simple asphyxiant Percutaneous
Minimum exposure Sensitizer R,D
Prohibited use Prohibited recirculation
Carcinogenicity

TWA adjustment for unusual work schedules

IV : Daily or weekly adjustment ( the more stringent of the two)

CNESST – Toxicological Index Service

Consult REPTOX file: Maleic anhydride(IFV)

Analysis:

Anhydride maléique

Recommended method by the IRSST:
Method: OSHA - 86

Sampling device: Glass fiber filters impregnated with veratrylamine.
Parameters:
Flow rate: 0,5 L/min
TWA sampling volume: 60 L
STEL sampling volume: -
Remarks: The samples must be stored in the refrigerator until analysis. Contact the IRSST before sampling.

Principle: High performance liquid chromatography with UV detection (HPLC-UV)

OSHA Analytical Methods Manual. Method 86. Maleic Anhydride. Salt Lake City, 1990.
Following the amendment of Appendix 1 of the Quebec Regulation respecting occupational health and safety (RSST, RLRQ, c. S-2.1, r. 13), part of Quebec Occupational Health and Safety Act, which came into effect on March 26, 2020, the TWAEV, STEL and Ceiling values for certain substances are now expressed in ppm. For these substances, the IRSST performed the conversion calculations to express these TWAEV, TWA and Ceiling values in mg/m3, which thus appears in its Sampling Guide for Air Contaminants in the Workplace (Guide d'échantillonnage des contaminants de l'air en milieu de travail ) and the associated Substance Data Sheets. However, it is imperative to refer to the values expressed in the RSST which are legally binding.