C4H10S
90.19 g/mol
Industrial ChemicalDanger
1-Butanethiol
CAS109-79-5EC203-705-3
Category
Industrial Chemical
Compound Class
Other
Primary Use
Odorant for natural gas
1-Butanethiol is a volatile, colorless liquid organosulfur compound with a strong, fetid odor commonly described as 'skunk' odor. It is primarily used as an odorant for natural gas to enable leak detection.
Odorant for natural gasLeak detection agentChemical research
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
ApplicationSame Use
2-butanethiol
CAS513-53-1
Odorant for natural gas
ApplicationSame Use
Ethanethiol
CAS75-08-1
Odorant for natural gas
ReferenceSame Category
2-(methylamino)ethanol
CAS109-83-1
acid gas scrubbing and electrostatic coatings
ReferenceSame Category
Ethylene glycol monomethyl ether
CAS109-86-4
solvent for varnishes, dyes, and resins
ReferenceSame Category
Dimethoxymethane
CAS109-87-5
solvent for adhesives and coatings
ReferenceSame Category
Methanol magnesium salt
CAS109-88-6
Methanol magnesium salt reagent
Safety Reference
Danger
H225Highly flammable liquid and vapour
H302Harmful if swallowed
H319Causes serious eye irritation
H332Harmful if inhaled
H317May cause an allergic skin reaction
H335May cause respiratory irritation
H336May cause drowsiness or dizziness
H370Causes damage to organs
H316Causes mild skin irritation
H320Causes eye irritation
H361Suspected of damaging fertility or the unborn child
H371May cause damage to organs
Regulatory Compliance1
- CN Catalogue of Hazardous ChemicalsCNRegulation
Customs Tariff Classification
The international HS code for 1-Butanethiol (CAS 109-79-5) 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
butane-1-thiol
InChIKey
WQAQPCDUOCURKW-UHFFFAOYSA-N
SMILES
CCCCS
Synonyms (38)
- BUSH
- 1-Butanethiol
- 1-Butyl mercaptan
- 1-Mercaptobutane
- 1-butylthiol
- 4-butanethiol
- BUTYL MERCAPTAN
- BUTYLMERCAPTAN, N-
- Bear skunk
- Butanethiol
- Butylthiol
- Caswell No. 119D
- FEMA 3478
- Mercaptan C4
- Normal butyl thioalcohol
- Thiobutyl alcohol
- butyl thioalcohol
- n-BuSH
- n-Butanethiol
- n-Butyl mercaptan
- n-Butyl thioalcohol
- n-Butylthiol
- n-butane-1-thiol
- n-butanthiol
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