Acetylene

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.

Acetylene

French name in the regulation: Acétylène

CAS : 74-86-2

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)

	ppm	mg/m³	f/cc	Notes
TWAEV	-	-	-	-
STEV	-	-	-	-
Ceiling	-	-	-	-

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

TWA adjustment for unusual work schedules

1C : No adjustment

CNESST – Toxicological Index Service

Consult REPTOX file: Acetylene

Analysis:

Acétylène

Method: IRSST - 9-C

Sampling protocol

Sampling device:
Parameters:
Flow rate: -
TWA sampling volume: -
STEL sampling volume: -

Analytical protocol

Principle: Combustible gas detector (DRI-EX)
Remarks: The DRI is for analyzing combustible gases as a percentage of their lower explosive limit. Acetylene quantification is done in the field with a direct-reading instrument. In the paper version of the sampling guide, see the remark about simple asphyxiants. The method in the reference corresponds to DRI calibration.

Reference

IRSST. "Étalonnage d'un instrument à lecture directe pour la mesure des gaz combustibles dans l'air". Méthode 9-C. Méthodes d'étalonnage. Montréal: IRSST, 1995.