|cis-1,2-Dichloroethene (Z) (left) and trans-1,2-Dichloroethene (E) (right)|
|CAS number||(Z) , (E), (mixture of E and Z)|
|PubChem||(Z), (E), (mixture of E and Z)|
|Jmol-3D images||Image 1
|Molar mass||96.95 g/mol|
|Density||Z: 1.28 g/cm³
E: 1.26 g/cm³
|Melting point||Z: -81.47 °C
E: -49.44 °C
|Boiling point||Z: 60.2 °C
E: 48.5 °C
|Dipole moment||Z: 1.9 D
E: 0 D
| (what is: / ?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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. They have modest solubility in water. These compounds have "scarcely any industrial applications," although they are fundamental given their simple stoichiometries.
- C2H2 + Cl2 → C2H2Cl2
These compounds once were used as solvents, but other chlorocarbons such as dichloromethane are now used.
These compounds have "moderate oral toxicity to rats."
- E.-L. Dreher, T. R. Torkelson, K. K. Beutel (2011). "Chlorethanes and Chloroethylenes". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.o06_o01.