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

Methyl chloride  

French name in the regulation: Chlorométhane
CAS : 74-87-3
Synonyms: Chlorure de méthyle

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)
ppm mg/m3 f/cc Notes
TWAEV 50 103 - -
STEV 100 207 - -
Ceiling - - - -
Carcinogenicity Sensitizer
Simple asphyxiantPercutaneous
Prohibited useProhibited recirculation
Minimum exposureExplosion 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: Methyl chloride

Analysis:

Chlorométhane

Recommended method by the IRSST:
Method: NIOSH - 1001
Sampling device: Two 100/50 mg activated charcoal tubes in series
Parameters:
Flow rate: 0,01-0,1 L/min
TWA sampling volume: 3 L
STEL sampling volume: 1,5 L
Remarks: This substance is not analyzed by our laboratories. It might be possible that the analysis be performed by another laboratory. Please contact the IRSST before sampling.
Principle: Gas chromatography with flame ionization detection (GC-FID)
NIOSH Manual of Analytical Methods, 4th ed., Method 1001 : Methyl Chloride, 1994.