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Chlorinated and fluorinated solvents

Dichloroacetylene

Also known as Dichloroethyne, Ethyne, dichloro-, Acetylene, dichloro-

CAS 7572-29-4Formula C2Cl2Molar mass 94.93 g/molEC 620-404-6
GHS signal word: Warning. Pictograms: Explosive, Serious health hazard
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Dichloroacetylene chemical structure, C2Cl2, CAS 7572-29-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless oil
Melting point
-66 to -64
Boiling point
33 °C
Density
Relative density (water = 1): 1.2
Solubility
Insoluble in water, soluble in ethanol, diethyl ether and acetone
HS code
290329
Category
Chlorinated and fluorinated solvents
Illustrative photo, clear liquid in sealed glass ampoules on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Dichloroacetylene?

Plain description, key identifiers and synonyms

Dichloroacetylene is an organochlorine compound.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1,2-dichloroethyne
CAS number
7572-29-4 CAS number cross-checked
EC number
620-404-6
Molecular formula
C2Cl2
UNII
95I833JV4S
MDL number
MFCD00028172
InChIKey
ZMJOVJSTYLQINE-UHFFFAOYSA-N
InChI
InChI=1S/C2Cl2/c3-1-2-4
SMILES (canonical and isomeric)
C(#CCl)Cl

Synonyms

  • Dichloroethyne
  • Ethyne, dichloro-
  • Acetylene, dichloro-
  • 1,2-dichloroethyne
  • 1,2-dichloro-ethyne
  • C2Cl2
  • Dichloroacetylene [Forbidden]
  • ClC.$.CCl
  • 1,2-Dichloroacetylene #

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 oilexp.
Odour
Disagreeable, sweetish odorexp.
Melting point
-66 to -64exp.
Boiling point
33 °Cexp.
Density
Relative density (water = 1): 1.2exp.
Solubility
Insoluble in water, soluble in ethanol, diethyl ether and acetoneexp.
Vapour pressure
570 mm Hg @ 25 °C /Estimated/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
94.93 g/molcalc.
Exact mass
93.9377 Dacalc.
LogP (octanol/water)
1.38calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
4calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
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
Warning
GHS01: Explosive
Explosive
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H200Unstable explosive.
  • H351Suspected of causing cancer.
  • H373May cause damage to organs through prolonged or repeated exposure.
Precautionary statements (14)
  • P201Obtain special instructions before use.
  • P202Do not handle until all safety precautions have been read and understood.
  • P203Obtain, read and follow all safety instructions before use.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P281Use personal protective equipment as required.
  • P318If exposed or concerned, get medical advice.
  • P319Get medical help if you feel unwell.
  • P372Explosion risk.
  • P373Do not fight fire when fire reaches explosives.
  • P380Evacuate area.
  • P401Store in accordance with local regulations.
  • 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

Dichloroacetylene suppliers

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Dichloroacetylene 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

How it is made

It is obtained from acetylene in strongly alkaline potassium hypochlorite solution or by reaction of trichloroethylene vapor with caustic alkali.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 602-069-00-8

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2903.29Indicative HS code

Unsaturated chlorinated derivatives of acyclic hydrocarbons, other

World exports in 2024
$203M
−6.5% vs 2023, imports $212M
2019 to 2024
Top exporters
  1. China36.1%
  2. United States12.4%
  3. Germany9.0%
Top importers
  1. United States29.9%
  2. Spain12.1%
  3. Netherlands10.2%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Dichloroacetylene?

Dichloroacetylene is an organochlorine compound.

What is the CAS number of Dichloroacetylene?

The CAS registry number of Dichloroacetylene is 7572-29-4.

What is the molecular formula and weight of Dichloroacetylene?

The molecular formula of Dichloroacetylene is C2Cl2 and its molar mass is 94.93 g/mol.

Is Dichloroacetylene hazardous?

Dichloroacetylene carries the GHS signal word "Warning". Main hazards: unstable explosive, suspected of causing cancer, may cause damage to organs through prolonged or repeated exposure. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Dichloroacetylene?

Dichloroacetylene is usually classified under HS code 290329 (Unsaturated chlorinated derivatives of acyclic hydrocarbons, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Dichloroacetylene?

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What is the price of Dichloroacetylene?

Suppliers quote Dichloroacetylene 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 Dichloroacetylene

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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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