CH4S
48.11 g/mol
Industrial ChemicalDanger
Methanethiol
CAS74-93-1EC200-822-1
Category
Industrial Chemical
Compound Class
Other
Primary Use
odorant for natural gas
Methanethiol is a colorless gas with a strong odor reminiscent of rotten cabbage. It occurs naturally in living tissues, certain foods, and decaying organic matter, and is used as an odorant added to natural gas and other hazardous gases to aid in leak detection.
odorant for natural gasadditive for odorless hazardous gasesindustrial chemical for plastics, pesticides, and jet fuel
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
ReferenceSame Category
Dibromomethane
CAS74-95-3
solvent for fats, waxes, and resins
ReferenceSame Category
Bromoethane
CAS74-96-4
Organic synthesis and solvent
ReferenceSame Category
Bromochloromethane
CAS74-97-5
Fire extinguishing agent
ReferenceSame Category
Propane
CAS74-98-6
Fuel, solvent, refrigerant, and propellant
Referencestereoisomer of
Sodium methanethiolate
CAS5188-07-8
pharmaceutical intermediate
Safety Reference
Danger
H220Extremely flammable gas
H331Toxic if inhaled
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects
H280Contains gas under pressure; may explode if heated
H315Causes skin irritation
H319Causes serious eye irritation
H336May cause drowsiness or dizziness
H370Causes damage to organs
H372Causes damage to organs through prolonged or repeated exposure
Regulatory Compliance1
- CN Catalogue of Hazardous ChemicalsCNRegulation
Customs Tariff Classification
The international HS code for Methanethiol (CAS 74-93-1) is 2930.90.
HS code (international, 6-digit)
2930.90
EU CN code (8-digit)
2930 90 95
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
methanethiol
InChIKey
LSDPWZHWYPCBBB-UHFFFAOYSA-N
SMILES
CS
Synonyms (32)
- Z22
- (methyl)sulfane
- METHYL MERCAPTAN
- Mercaptan methylique
- Mercaptan methylique [French]
- Mercaptomethane
- Methaanthiol
- Methaanthiol [Dutch]
- Methanethiol, purum
- Methanethiole
- Methanthiol
- Methanthiol [German]
- Methvtiolo
- Methvtiolo [Italian]
- Methyl mercaptan (natural)
- Methyl sulfhydrate
- Methyl thioalcohol
- Methylmercaptaan
- Methylmercaptaan [Dutch]
- Metilmercaptano
- Metilmercaptano [Italian]
- Metilmercaptano [Spanish]
- Thiomethane
- Thiomethanol
- Thiomethyl alcohol
- a methyl thioether
- methanethiol
- methanethiolate
- methyl sulfides
- methyl thiol
- sulfonium methylide
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