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Impurities and reference standards

1,2-Ethanedithiol

Also known as Ethane-1,2-dithiol, 1,2-Dimercaptoethane, Dithioglycol

CAS 540-63-6Formula C2H6S2Molar mass 94.20 g/molEC 208-752-3
GHS signal word: Danger. Pictograms: Flammable, Acute toxicity (severe), Harmful or irritant 21 suppliers listed
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1,2-Ethanedithiol chemical structure, C2H6S2, CAS 540-63-6
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Liquid
Melting point
-41.2 °C
Boiling point
146 °C
Density
1.123 at 23.5 °C
Solubility
Freely soluble in alkalies
HS code
293090
Category
Impurities and reference standards
Illustrative photo, a closed 1000 litre IBC tote in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is 1,2-Ethanedithiol?

Plain description, key identifiers and synonyms

1,2-Ethanedithiol is a chemical substance with the molecular formula C2H6S2 and a molar mass of 94.20 g/mol. Its CAS registry number is 540-63-6. The IUPAC name is ethane-1,2-dithiol.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
ethane-1,2-dithiol
CAS number
540-63-6 CAS number cross-checkedOther or deprecated CAS: 27515-15-7
EC number
208-752-3
Molecular formula
C2H6S2
UNII
92T634FLAR
MDL number
MFCD00004892
InChIKey
VYMPLPIFKRHAAC-UHFFFAOYSA-N
InChI
InChI=1S/C2H6S2/c3-1-2-4/h3-4H,1-2H2
SMILES (canonical and isomeric)
C(CS)S

Synonyms

  • Ethane-1,2-dithiol
  • 1,2-Dimercaptoethane
  • Dithioglycol
  • Ethylene mercaptan
  • Ethylenedithiol
  • Ethylene dithioglycol
  • Ethylene dimercaptan
  • Ethylenedimercaptan
  • Dithioethyleneglycol
  • S-Ethylene dimercaptan
  • Ethylene glycol, dithio-
  • 1,2-Dithiol ethane
  • Ethyl hydropersulfide
  • Dithioethylene glycol
  • ethandithiol
  • 1,2-Ethanethiol
  • Ethane-1.2-dithiol
  • 1,2-Dithiolethane
  • Ethanedithiol, 1,2-
  • 1,2-ethandithiol
  • Mesna Impurity 13
  • ethane 1,2-dithiol
  • ethane-1 2-dithiol
  • 1,2-Ethane dithiol
  • a-Ethylene dimercaptan
Show all 34 synonyms
  • Dithio-Ethylene glycol
  • ethane-1, 2-dithiol
  • ethane-1,2,-dithiol
  • alpha-Ethylene dimercaptan
  • 2-Mercaptoethanethiol
  • 4-01-00-02450 (Beilstein Handbook Reference)
  • 1,2-Ethanedithiol Ethylene mercaptan
  • 1,2-Ethanedithiol, analytical standard
  • 1,2-Ethanedithiol, >=98.0% (GC)

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
Liquidexp.
Melting point
-41.2 °Cexp.
Boiling point
146 °Cexp.
Density
1.123 at 23.5 °Cexp.
Solubility
Freely soluble in alkaliesexp.
Vapour pressure
5.61 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
94.20 g/molcalc.
Exact mass
93.9911 Dacalc.
LogP (octanol/water)
0.85calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
1calc.
Heavy atoms
4calc.
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)
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H226Flammable liquid and vapour.
  • H301Toxic if swallowed.
  • H302Harmful if swallowed.
  • H310Fatal in contact with skin.
  • H312Harmful in contact with skin.
  • H319Causes serious eye irritation.
  • H330Fatal if inhaled.
Precautionary statements (33)
  • 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.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P262Do not get in eyes, on skin, or on clothing.
  • 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.
  • P284In case of inadequate ventilation wear respiratory protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • 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.
  • P316Get emergency medical help immediately.
  • P317Get medical help.
  • P320Specific treatment is urgent (see supplemental first aid instructions on the label).
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P337 + P317If eye irritation persists: Get medical help.
  • P361 + P364Take off immediately all contaminated clothing. And wash it before reuse.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • 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.

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

1,2-Ethanedithiol suppliers

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

All 21 suppliers
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Where suppliers are based

21 suppliers in 5 countries

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1,2-Ethanedithiol 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

Metal-complexing agent. Reverse inhibition by alpha-keto aldehydes on mitosis in E. coli.

Functional uses

  • Flavouring and nutrient

How it is made

Prepared by reacting ethanol, thiourea and ethylene dibromide and subsequent alkaline hydrolysis of the ethylenediisothiuronium bromide.

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 1,2-Ethanedithiol 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 1,2-Ethanedithiol is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 1,2-Ethanedithiol, based on the data on this page

What is 1,2-Ethanedithiol?

1,2-Ethanedithiol is a chemical substance with the molecular formula C2H6S2 and a molar mass of 94.20 g/mol. Its CAS registry number is 540-63-6. The IUPAC name is ethane-1,2-dithiol.

What is the CAS number of 1,2-Ethanedithiol?

The CAS registry number of 1,2-Ethanedithiol is 540-63-6. Other or deprecated CAS numbers: 27515-15-7.

What is the molecular formula and weight of 1,2-Ethanedithiol?

The molecular formula of 1,2-Ethanedithiol is C2H6S2 and its molar mass is 94.20 g/mol.

What is 1,2-Ethanedithiol used for?

Metal-complexing agent. Reverse inhibition by alpha-keto aldehydes on mitosis in E. coli.

Is 1,2-Ethanedithiol hazardous?

1,2-Ethanedithiol carries the GHS signal word "Danger". Main hazards: flammable liquid and vapour, toxic if swallowed, harmful if swallowed. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 1,2-Ethanedithiol?

1,2-Ethanedithiol 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 1,2-Ethanedithiol?

CompoundList lists 21 suppliers of 1,2-Ethanedithiol in China, United States, India, Canada and 1 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy 1,2-Ethanedithiol in India?

2 suppliers in India list 1,2-Ethanedithiol on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of 1,2-Ethanedithiol?

Suppliers quote 1,2-Ethanedithiol 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 1,2-Ethanedithiol

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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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