Agent Name

sec-Butyl mercaptan

Alternative Name

2-Butanethiol

CAS Number

513-53-1

Formula

C4-H10-S

Major Category

Other Classes

Synonyms

2-Butanethiol; 1-Methyl-1-propanethiol; 2-Butyl mercaptan; 2-Butylmercaptan; 2-Mercaptobutane; sec-Butanethiol; sec-Butyl thioalcohol; sec-Butyl thiol; secondary Butylmercaptan; [ChemIDplus] UN2347

Category

Thiols

Description

Liquid with a strong skunk-like odor; [Merck Index] Clear colorless liquid; [MSDSonline]

Sources/Uses

Used as odorant for natural gas and to make Cadusafos; [HSDB]

Comments

Emergency treatment: "Butyl mercaptan"; Butyl mercaptan is a mucous membrane irritant with a repulsive odor detectable at sub-toxic concentrations; It causes narcosis and paralysis; It causes pulmonary edema in animals subjected to near lethal doses; [HSDB] May cause moderate eye irritation, based on animal studies; Inhalation of high concentrations can cause CNS depression; [CHEMINFO] An irritant; Exposure may cause CNS depression; [MSDSonline] See "1-Butanethiol." See "THIOLS."

Exposure Assessment
Vapor Pressure

80.7 mm Hg

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Butyl mercaptan."

Flammability (NFPA)

3: May ignite at ambient temperature

Adverse Effects
Other Poison

Chemical Asphyxiant

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: