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


French name in the regulation: Enflurane
CAS : 13838-16-9
Synonyms: 2-Chloro-1-(difluoromethoxy)-1,1,2-trifluoroethane; Ethrane

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)
ppm mg/m3 f/cc Notes
TWAEV 75 566 - -
STEV - - - -
Ceiling - - - -
Simple asphyxiant Percutaneous
Minimum exposure Sensitizer
Prohibited use Prohibited recirculation

TWA adjustment for unusual work schedules

II : Daily adjustment

CNESST – Toxicological Index Service

Consult REPTOX file: Enflurane



Method: IRSST - 339-1
Sampling device:
Sampling media required:
2120 Activated charcoal tube 100/50 mg

Flow rate: Max: 0,2 L/min
TWA sampling volume: 5 L
STEL sampling volume: -
Remarks: Enflurane must be specifically sampled due to the specific analysis performed.
Principle: Gas chromatography with flame ionization detection (GC-FID)
Remarks: However, simultaneous sampling and analysis of halothane and isoflurane is possible. Enflurane standards have limited availability because this anesthetic agent is practically no longer used in Quebec. For this reason, contact the IRSST before sampling.
IRSST. "Analyse de l'enflurane dans l'air". Méthode non publiée.
Following the amendment of Appendix 1 of the Quebec Regulation respecting occupational health and safety (RSST, RLRQ, c. S-2.1, r. 13), part of Quebec Occupational Health and Safety Act, which came into effect on March 26, 2020, the TWAEV, STEL and Ceiling values for certain substances are now expressed in ppm. For these substances, the IRSST performed the conversion calculations to express these TWAEV, TWA and Ceiling values in mg/m3, which thus appears in its Sampling Guide for Air Contaminants in the Workplace (Guide d'échantillonnage des contaminants de l'air en milieu de travail ) and the associated Substance Data Sheets. However, it is imperative to refer to the values expressed in the RSST which are legally binding.