| cis-1,2-Dichloroethene (Z) (left) and trans-1,2-Dichloroethene (E) (right) | |
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1,2-Dichloroethene |
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Other names
1,2-Dichloroethylene |
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| Identifiers | |
| CAS number | 156-59-2 (Z) , 156-60-5 (E), 540-59-0 (racemate) |
| ChemSpider | 10438 |
| KEGG | C06792 |
| ChEBI | CHEBI:18882 |
| Jmol-3D images | Image 1 Image 2 |
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| Properties | |
| Molecular formula | C2H2Cl2 |
| Molar mass | 96.95 g/mol |
| Density | Z: 1.28 g/cm³ E: 1.26 g/cm³ |
| Melting point |
Z: -81 °C |
| Boiling point |
Z: 60.3 °C |
| Dipole moment | Z (cis): 1.9 D E (trans): 0 D |
| (verify) (what is: /?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox 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 minimally soluble (5090 mg/L for the cis-isomer[1]) in water, and 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.