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IUPAC name 1,2-Dichloroethene
Other names 1,2-Dichloroethylene
CAS number 156-59-2
trans: 156-60-5
mix: 540-59-0&c=0&v= cis: 156-59-2
trans: 156-60-5
mix: 540-59-0
SMILES cis: Cl/C=C\Cl
trans: Cl/C=C/Cl
Molecular formula C2H2Cl2
Molar mass 96.95 g/mol
Density cis: 1.28 g/cm³
trans: 1.26 g/cm³
Melting point

trans: -50 °C
cis: -81 °C

Boiling point

trans: 47.5 °C
cis: 60.3 °C

Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

1,2-Dichloroethene, commonly called 1,2-dichloroethylene or 1,2-DCE, is an organochloride with the molecular formula C2H2Cl2. It is a highly flammable, colorless liquid with a sharp, harsh odor. It can exist as either of two geometric isomers, cis-1,2-dichloroethene or trans-1,2-dichloroethene, but is often used as a mixture of the two. It is insoluble in water, but soluble in ethanol, diethyl ether, acetone, benzene, and chloroform.

1,2-DCE is used as a solvent for waxes, resins, polymers, fats, and lacquers. It is also used as an intermediate in the preparation of other chlorinated solvents.

The major health effect of inhalation of vapors of 1,2-DCE is narcosis; it has been used in a combination with diethyl ether as an anesthetic. In high concentrations, exposure to 1,2-DCE causes central nervous system depression; in milder exposures, it can produce nausea, vomiting, weakness, tremor, epigastric cramps, burning of the eyes and vertigo.

See also


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