Ethyl mercaptan

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.

Ethyl mercaptan

French name in the regulation: Éthylmercaptan

CAS : 75-08-1

Synonyms: Éthanethiol

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)

	ppm	mg/m³	f/cc	Notes
TWAEV	0,5	1,3	-	-
STEV	-	-	-	-
Ceiling	-	-	-	-

Carcinogenicity		Sensitizer
Simple asphyxiant		Percutaneous
Prohibited use		Prohibited recirculation
Minimum exposure		Explosion hazard
Ototoxic

TWA adjustment for unusual work schedules

1B : No adjustment

CNESST – Toxicological Index Service

Consult REPTOX file: Ethyl mercaptan

Analysis:

Ethylmercaptan

Recommended method by the IRSST:

Method: NIOSH - 2542

Sampling protocol

Sampling device: Glass fiber filter impregnated with a solution of 5% (w/w) mercuric acetate.
Parameters:
Flow rate: 0,1-0,2 L/min
TWA sampling volume: 150 L
STEL sampling volume: -
Remarks: Contact the IRSST before sampling. Protect the samples from light.

Analytical protocol

Principle: Gas chromatography with flame photometric detection (GC-FPD)

Reference

NIOSH, Manual of Analytical Methods, 4th ed., Method 2542 Mercaptans, methyl-,Ethyl-, and n-Butyl, 1994.