IRSST - Institut de recherche Robert-Sauvé en santé et en sécurité du travail

substance

Laboratory Services   >   Analysis and Testing Services   >   Workplace Air Contaminants   >   substance
November 22, 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.

Methane  

French name in the regulation: Méthane
CAS : 74-82-8

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)
ppm mg/m3 f/cc Notes
TWAEV - - - -
STEV - - - -
Ceiling - - - -
Carcinogenicity Sensitizer
Simple asphyxiant Percutaneous
Prohibited useProhibited recirculation
Minimum exposureExplosion hazard
Ototoxic

TWA adjustment for unusual work schedules

1C : No adjustment

CNESST – Toxicological Index Service

Consult REPTOX file: Methane

Analysis:

Méthane

Method: IRSST - 9-C

Sampling protocol

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

Principle: Combustible gas detector (DRI-EX)
Remarks: A DRI is used for measuring combustible gases in terms of percentage of their lower explosive limit. In the paper version of the guide, refer to the note about simple asphyxiants. The reference method corresponds to calibration of the direct-reading instrument (DRI).

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.