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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
Browse similar
Flammable · Gas under pressure · Toxic · Environmental hazard
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). SNRL 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.