What does 1-butanethiol smell like?

It has a sharply strong, skunk-like odor that is mostly used to check gas leaks.

Is 1-Butanethiol harmful to use?

Yes, it is toxic when inhaling, so avoid inhalation. It is also flammable; therefore, proper PPE and ventilation are required when maintaining.

How can I obtain an MSDS?

Contact via email or call Chemical Bull to request an MSDS with regulatory and safety information.

Watch Video MSDS Specifications

1-Butanethiol | 109-79-5

Name: 1-Butanethiol
Brand: Chemical Bull
Availability: InStock

Cas No :

109-79-5

Synonyms :

Form :

Liquid

Molecular Weight :

90.19 G/Mol

Molecular Formula :

C₄H₁₀S

Melting Point :

-116 °C

Boiling Point :

12 °C

Solubility :

Ether, Alcohol

Flash Point :

2°C

Description :

Overview of 1-Butanethiol

1-Butanethiol, also known as Butyl Mercaptan or N-Butyl Mercaptan, is a strong sulfur-based organic compound recognised for its sharp, skunk-like odour. It is a clear to pale-yellow liquid widely used in industrial applications, research laboratories, fuel odorants, and organic chemical synthesis.

Due to its high odour strength, it is effective in trace-level applications, especially in gas warning agents and chemical intermediates. ChemicalBull supplies high-purity 1-Butanethiol suitable for industrial, research, and speciality formulation requirements.

You may also like: Tert-Butyl Mercaptan, Methanethiol, Ethanethiol, Isobutyl Mercaptan, and 1-Pentanethiol for thiol and sulfur compound applications.

Property	Value
Chemical Name	1-Butanethiol
Common Names	Butyl Mercaptan, N-Butyl Mercaptan, Butyl Thiol
CAS Number	109-79-5
Molecular Formula	C₄H₁₀S
Molecular Weight	90.19 g/mol
Appearance	Clear to pale-yellow liquid
Odor	Strong sulfurous, skunky odor
Boiling Point	98–100°C
Density	0.84–0.86 g/cm³
Flash Point	Approximately −6°C (Highly flammable)
Solubility	Slightly soluble in water; good solubility in organic solvents

Applications of 1-Butanethiol

Industrial Applications

Used as an intermediate in chemical synthesis.
Applied in fuel additives and gas odorization systems as an early warning compound.
Valuable in polymer research and sulfur-based reactions.

Research & Laboratory Use

Used for mechanism studies and organic reaction development.
Acts as a precursor in the preparation of thiols and sulfide derivatives.

Odorant & Safety Systems

Suitable for gas leak detection, due to extremely strong odour even in low ppm levels.

Safety & Handling Guidelines

Always wear gloves, goggles, and lab-grade protective equipment while handling.
Avoid direct inhalation — fumes are strong and irritating.
Store in an airtight container, kept in a cool, dry, and ventilated area, away from heat or sparks.
Follow all local and industrial regulations for chemical storage and disposal.

Where to Buy 1-Butanethiol?

1-Butanethiol Manufacturer

ChemicalBull is a trusted manufacturer and supplier of 1-Butanethiol (Butyl Mercaptan) for industrial and laboratory use.

1-Butanethiol Supplier & Distributor

Bulk and custom packaging options
Export-grade sealed containers
Fast dispatch with full documentation

1-Butanethiol MSDS

Material Safety Data Sheet can be provided upon request.

Frequently Asked Questions (FAQs)

What is the smell of 1-Butanethiol?
It has a very strong skunk-like sulfur odour.
Is 1-Butanethiol the same as Butyl Mercaptan?
Yes — Butyl Mercaptan, N-Butyl Mercaptan, and Butyl Thiol are common synonyms.
What is the boiling point of 1-Butanethiol?
It boils at approximately 98–100°C.
Is 1-Butanethiol flammable?
Yes, it is highly flammable and must be stored safely.
Can it be used in laboratories?
Yes — it is widely used in research and sulfur chemistry applications.

1-Butanethiol | 109-79-5

Overview of 1-Butanethiol