Maleic anhydride (IFV)

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	-	-	-	-

Carcinogenicity	Sensitizer	R,D
Simple asphyxiant	Percutaneous
Prohibited use	Prohibited recirculation
Minimum exposure	Explosion hazard
Ototoxic

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 protocol

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.

Analytical protocol

Principle: High performance liquid chromatography with UV detection (HPLC-UV)
Remarks: Isocyanates, hydrochloric acid and aldehydes can cause interference during sampling.

Reference

OSHA Analytical Methods Manual. Method 86. Maleic Anhydride. Salt Lake City, 1990.