Methylene chloride

French name in the regulation: Chlorure de méthylène

CAS : 75-09-2

Synonyms: Dichlorométhane

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)

	ppm	mg/m³	f/cc	Notes
TWAEV	50	174	-	-
STEV	-	-	-	-
Ceiling	-	-	-	-

Carcinogenicity	C2	Sensitizer
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: Methylene chloride

Analysis:

Chlorure de méthylène

Method: IRSST - 27-2

Sampling protocol

Sampling device:
Sampling media required:

#IRSST	Description
2120	Activated charcoal tube 100/50 mg

Parameters:
Flow rate: Max: 0,2 L/min
TWA sampling volume: 3 L
STEL sampling volume: -

Principle: Gas chromatography with flame ionization detection (GC-FID)
Precision (%): 4,7
Minimum reported value: 27 µg
Remarks: The analysis can be done by gas chromatography coupled with mass spectrometry (GC-MS, IRSST method #369); in this case the analytical uncertainty (CVa) is 5.6%.

Reference

IRSST. "Analyse du chlorure de méthylène dans l'air". Méthode 27-2. Méthodes analytiques. Montréal: IRSST, 1995.