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methanethiol; methyl mercaptan

CAS 74-93-1 · CH4S

Hazard class

Danger — Flammable, Gas under pressure, Toxic, Environmental hazard

Pictograms

FlammableGas under pressureToxicEnvironmental hazard

H-statements

H220 Extremely flammable gas
H331 Toxic if inhaled
H400 Very toxic to aquatic life
H410 Very toxic to aquatic life with long lasting effects

Common uses (US EPA CDR)

IntermediatepH regulating agent

Workplace exposure limits

NIOSH REL C 0.5 ppm (1 mg/m3) [15-minute]
OSHA PEL C 10 ppm (20 mg/m3)
IDLH 150 ppm

Occupational exposure limits — NIOSH Pocket Guide.

Synonyms

methanethiol · METHYL MERCAPTAN · Methylmercaptan · Mercaptomethane · Thiomethanol · Thiomethyl alcohol · Methvtiolo · Metilmercaptano

Molecular weight

48.11 g/mol

Data source

Harmonised classification ECHA — EU CLP Annex VI

Legally binding EU classification adopted by ECHA under CLP Annex VI — the highest-confidence GHS source.

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GHS/CLP classification from authoritative registries (ECHA Annex VI, PubChem). Reagent is a free chemical safety search. Browse categories · API · Console

Guide only. This information is compiled from published safety data sheets and public regulatory registries and is believed correct at the date of publication shown. It is not all-inclusive and shall be used only as a guide. It does not replace the manufacturer’s current Safety Data Sheet, which governs in all cases. SNRL shall not be held liable for any injury, loss or damage resulting from handling of, or contact with, any product listed.