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


French name in the regulation: Difluorodibromométhane
CAS : 75-61-6
Synonyms: Halon 1202, Dibromodifluorométhane

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)
ppm mg/m3 f/cc Notes
TWAEV 100 858 - -
STEV - - - -
Ceiling - - - -
Simple asphyxiant Percutaneous
Minimum exposure Sensitizer
Prohibited use Prohibited recirculation

TWA adjustment for unusual work schedules

IV : Daily or weekly adjustment ( the more stringent of the two)

CSST – Toxicological Index Service

Consult REPTOX file: Difluorodibromométhane



Recommended method by the IRSST:
Method: NIOSH - 1012
Sampling device: Two 100/50 mg activated charcoal tubes in series
Flow rate: 0,01-0,2 L/min
TWA sampling volume: 10 L
STEL sampling volume: -
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 1012 : Difluorodibromomethane, 1994.