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Herbicides

Butanethiol

Also known as 1-Butanethiol, butane-1-thiol, Butyl mercaptan

CAS 109-79-5Formula C4H10SMolar mass 90.19 g/molEC 203-705-3
GHS signal word: Danger. Pictograms: Flammable, Harmful or irritant 17 suppliers listed
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Butanethiol chemical structure, C4H10S, CAS 109-79-5
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless liquid
Melting point
-115.9 °C
Boiling point
97.2 to 101.7
Density
Relative density (water = 1): 0.83
Flash point
2 °C
HS code
293090
Category
Herbicides
UN number
UN 2347
Illustrative photo, 200 litre blue HDPE drums of liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Butanethiol?

Plain description, key identifiers and synonyms

Butanethiol is an alkanethiol.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
butane-1-thiol
CAS number
109-79-5 CAS number cross-checked
EC number
203-705-3
Molecular formula
C4H10S
UNII
77OY909F30
MDL number
MFCD00004905
InChIKey
WQAQPCDUOCURKW-UHFFFAOYSA-N
InChI
InChI=1S/C4H10S/c1-2-3-4-5/h5H,2-4H2,1H3
SMILES (canonical and isomeric)
CCCCS

Synonyms

  • 1-Butanethiol
  • butane-1-thiol
  • Butyl mercaptan
  • n-Butyl mercaptan
  • Thiobutyl alcohol
  • Butylthiol
  • 1-Mercaptobutane
  • butylmercaptan
  • 1-Butyl mercaptan
  • n-Butyl thioalcohol
  • Bear skunk
  • Normal butyl thioalcohol
  • n-Butanethiol
  • n-Butylmercaptan
  • n-Butylthiol
  • n-C4H9SH
  • Mercaptan C4
  • butyl thioalcohol
  • n-butane-1-thiol
  • butane thiol
  • n-butanthiol
  • n-butyl mercaptan, sodium salt
  • 4-butanethiol
  • 1-butylthiol
  • 1-butylmercaptan
Show all 38 synonyms
  • n-butyl mercaptan, lithium salt
  • n-butyl mercaptan, Ag(+1) salt
  • n-butyl mercaptan, potassium salt
  • n-butyl mercaptan, tin (+2) salt
  • n-BuSH
  • n-butyl mercaptan, lead (+2) salt
  • BUSH
  • n-butyl mercaptan, copper (+1) salt
  • n-butyl mercaptan, silver (+2) salt
  • n-butyl mercaptan, geranium (+2) salt
  • n-butyl mercaptan, molybdenum (+3) salt
  • 1-Butanethiol, 99%
  • Butylmercaptan, n-

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Colorless liquidexp.
Odour
Strong, obnoxious odorexp.
Taste
BITTER TASTE AT LOW LEVELSexp.
Melting point
-115.9 °Cexp.
Boiling point
97.2 to 101.7exp.
Density
Relative density (water = 1): 0.83exp.
Flash point
2 °Cexp.
Solubility
In water, 595 mg/L at 25 °Cexp.
Vapour pressure
45.5 mm Hg at 25 °Cexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
90.19 g/molcalc.
Exact mass
90.0503 Dacalc.
LogP (octanol/water)
1.72calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
2calc.
Heavy atoms
5calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS07: Harmful or irritant
Harmful or irritant
310NFPA 704 rating

Hazard statements

  • H225Highly flammable liquid and vapour.
  • H302Harmful if swallowed.
  • H319Causes serious eye irritation.
  • H332Harmful if inhaled.
Precautionary statements (22)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P317Get medical help.
  • P330Rinse mouth.
  • P337 + P317If eye irritation persists: Get medical help.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2347
Transport hazard class
3
Packing group
II

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Butanethiol suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 17 suppliers
17 of 17 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

17 suppliers in 4 countries

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Butanethiol price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

As solvent.

Intermediate for insecticides, acaricides, herbicides, defoliants.

As an odorant.

Industrial uses: Other, Intermediate.

Consumer uses: Intermediate.

Functional uses

  • Flavouring and nutrient

How it is made

Reaction of n-butylene with hydrogen sulfide in the presence of a catalyst

Formed by the action of yeast on a product obtained when hydrogen sulfide is made to react with butyraldehyde in alcoholic ammonia, ... by passing vapors of butanol and hydrogen sulfide over thorium oxide catalyst, ... together with dibutyl sulfide in distilling an aqueous solution of sodium butyl sulfate and sodium sulfide, ... by slightly warming dithiocarbamic butyl ester with aqueous potassium hydroxide.

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Butanethiol is traded under.

HS 2930.90Indicative HS code

Organo-sulphur compounds, other

World exports in 2024
$5.83B
+0.1% vs 2023, imports $5.93B
2019 to 2024
Top exporters
  1. China40.7%
  2. United States10.9%
  3. Japan9.3%
Top importers
  1. United States13.3%
  2. Brazil12.6%
  3. China6.6%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Butanethiol is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Butanethiol, based on the data on this page

What is Butanethiol?

Butanethiol is an alkanethiol.

What is the CAS number of Butanethiol?

The CAS registry number of Butanethiol is 109-79-5.

What is the molecular formula and weight of Butanethiol?

The molecular formula of Butanethiol is C4H10S and its molar mass is 90.19 g/mol.

What is Butanethiol used for?

As solvent. Intermediate for insecticides, acaricides, herbicides, defoliants. As an odorant. Industrial uses: Other, Intermediate. Consumer uses: Intermediate.

Is Butanethiol hazardous?

Butanethiol carries the GHS signal word "Danger". Main hazards: highly flammable liquid and vapour, harmful if swallowed, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Butanethiol?

Butanethiol is usually classified under HS code 293090 (Organo-sulphur compounds, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Butanethiol?

CompoundList lists 17 suppliers of Butanethiol in China, United States, India and Turkey. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Butanethiol in India?

3 suppliers in India list Butanethiol on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Butanethiol?

Suppliers quote Butanethiol on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Butanethiol

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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