Chlorodifluoromethane

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.

Chlorodifluoromethane

French name in the regulation: Chlorodifluorométhane

CAS : 75-45-6

Synonyms: Fréon 22

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)

	ppm	mg/m³	f/cc	Notes
TWAEV	1000	3540	-	-
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: Chlorodifluoromethane

Analysis:

Chlorodifluorométhane (F22)

Method: IRSST - 153-1

Sampling protocol

Sampling device:
Sampling media required:

#IRSST	Description
2121	Activated charcoal 400/200 mg

Parameters:
Flow rate: 0,2 L/min
TWA sampling volume: 5 L
STEL sampling volume: -
Remarks: Chlorodifluoromethane must be sampled specifically due to the sampling device used. Freon 22. However, simultaneous sampling and analysis of 1,1,2-trichloro-1,2,2-ethane (Freon 113) are possible.

Analytical protocol

Principle: Gas chromatography with flame ionization detection (GC-FID)
Precision (%): 10,4

Reference

IRSST. "Analyse du chlorodifluorométhane (fréon 22)". Méthode 153-1. Non publiée.