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Rodenticides, nematicides and other pesticides

Ethanethiol

Also known as Ethyl mercaptan, Mercaptoethane, Ethyl sulfhydrate

CAS 75-08-1Formula C2H6SMolar mass 62.14 g/molEC 200-837-3
GHS signal word: Danger. Pictograms: Flammable, Acute toxicity (severe), Hazardous to the environment 27 suppliers listed
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Ethanethiol chemical structure, C2H6S, CAS 75-08-1
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless liquid [Note: A gas above 95 degrees F]
Melting point
-147.8 °C
Boiling point
35.1 °C
Density
Relative density (water = 1): 0.839
Flash point
-48.3 °C
HS code
293090
Category
Rodenticides, nematicides and other pesticides
UN number
UN 2363
Illustrative photo, 200 litre blue HDPE drums of liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Ethanethiol?

Plain description, key identifiers and synonyms

Ethanethiol is an alkanethiol that is ethane substituted by a thiol group at position 1. It is added to odorless gaseous products such as liquefied petroleum gas (LPG) to provide a garlic scent which helps warn of gas leaks. It has a role as a rodenticide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
ethanethiol
CAS number
75-08-1 CAS number cross-checked
EC number
200-837-3
Molecular formula
C2H6S
UNII
M439R54A1D
MDL number
MFCD00004887
InChIKey
DNJIEGIFACGWOD-UHFFFAOYSA-N
InChI
InChI=1S/C2H6S/c1-2-3/h3H,2H2,1H3
SMILES (canonical and isomeric)
CCS

Synonyms

  • Ethyl mercaptan
  • Mercaptoethane
  • Ethyl sulfhydrate
  • Thioethanol
  • Ethyl thioalcohol
  • Thioethyl alcohol
  • Ethyl hydrosulfide
  • Aethylmercaptan
  • Etilmercaptano
  • Aethanethiol
  • Etantiolo
  • 1-Mercaptoethane
  • Ethaanthiol
  • Ethylmercaptaan
  • Ethylmerkaptan
  • ethyl-mercaptan
  • LPG ethyl mercaptan 1010
  • Mercaptan C2
  • ethanthiol
  • ethylmercaptan
  • 1-ethanethiol
  • ethanethioi
  • ethanothiol
  • stench
  • ethane thiol
Show all 31 synonyms
  • stench gas
  • 1-Ethylthiol
  • EtSH
  • HSEt
  • Ethanethiol, 97%
  • Bacitracin Impurity F

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 liquid [Note: A gas above 95 degrees F]exp.
Odour
Leek-like odorexp.
Melting point
-147.8 °Cexp.
Boiling point
35.1 °Cexp.
Density
Relative density (water = 1): 0.839exp.
Flash point
-48.3 °Cexp.
Autoignition temperature
298.9 °Cexp.
Solubility
In water, 15,603 mg/L at 25 °Cexp.
Vapour pressure
529 mm Hg at 25 °C /Extrapolated/exp.

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
62.14 g/molcalc.
Exact mass
62.019 Dacalc.
LogP (octanol/water)
0.94calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
3calc.
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
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS09: Hazardous to the environment
Hazardous to the environment
421NFPA 704 rating

Hazard statements

  • H224Extremely flammable liquid and vapour.
  • H302Harmful if swallowed.
  • H331Toxic if inhaled.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (24)
  • 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.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P273Avoid release to the environment.
  • 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.
  • P316Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P391Collect spillage.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2363
Transport hazard class
3
Packing group
I

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

Ethanethiol suppliers

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

All 27 suppliers
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Where suppliers are based

27 suppliers in 6 countries

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Ethanethiol 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

Odorant for natural gas, intermediate and starting material in manufacture of plastics, insecticides, antioxidants.

Intermediate in production of acaricides, defoliants, pharmaceuticals, and adhesives.

Industrial uses: Fuel, Other, Intermediate, Fragrance.

Consumer uses: Fuel, Intermediate.

Roles

  • pesticide
  • rodenticide

Functional uses

  • Flavouring and nutrient

How it is made

From sodium ethylsulfate and KSH (potassium thiol), ... catalytically from ethanol and hydrogen sulfide.

By saturating potassium hydroxide solution with hydrogen sulfide, mixing with calcium ethylsulfate solution and distilling on water bath.

Ethanethiol is prepared from ethylene and hydrogen sulfide in the gas phase over aluminum oxide catalysts containing potassium tungstate or nickel and tungsten oxides.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 016-022-00-9

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 Ethanethiol 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 Ethanethiol is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Ethanethiol?

Ethanethiol is an alkanethiol that is ethane substituted by a thiol group at position 1. It is added to odorless gaseous products such as liquefied petroleum gas (LPG) to provide a garlic scent which helps warn of gas leaks. It has a role as a rodenticide.

What is the CAS number of Ethanethiol?

The CAS registry number of Ethanethiol is 75-08-1.

What is the molecular formula and weight of Ethanethiol?

The molecular formula of Ethanethiol is C2H6S and its molar mass is 62.14 g/mol.

What is Ethanethiol used for?

Odorant for natural gas, intermediate and starting material in manufacture of plastics, insecticides, antioxidants. Intermediate in production of acaricides, defoliants, pharmaceuticals, and adhesives. Industrial uses: Fuel, Other, Intermediate, Fragrance. Consumer uses: Fuel, Intermediate.

Is Ethanethiol hazardous?

Ethanethiol carries the GHS signal word "Danger". Main hazards: extremely flammable liquid and vapour, harmful if swallowed, toxic if inhaled. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Ethanethiol?

Ethanethiol 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 Ethanethiol?

CompoundList lists 27 suppliers of Ethanethiol in United States, China, India, Australia and 2 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Ethanethiol in India?

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

What is the price of Ethanethiol?

Suppliers quote Ethanethiol 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 Ethanethiol

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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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