1,2-Dichloroethene

cis-1,2-Dichloroethene (Z) (left) and trans-1,2-Dichloroethene (E) (right)
IUPAC name 1,2-Dichloroethene
Other names 1,2-Dichloroethylene 1,2-DCE
Identifiers
CAS number	156-59-2 (Z) Y, 156-60-5 (E), 540-59-0 (racemate)
ChemSpider	10438 Y
KEGG	C06792 Y
ChEBI	CHEBI:18882 Y
Jmol-3D images	Image 1 Image 2
SMILES Cl[C@H]=CCl ClC=CCl
InChI InChI=1S/C2H2Cl2/c3-1-2-4/h1-2H Y Key: KFUSEUYYWQURPO-UHFFFAOYSA-N Y InChI=1/C2H2Cl2/c3-1-2-4/h1-2H/b2-1- Key: KFUSEUYYWQURPO-UPHRSURJBI InChI=1/C2H2Cl2/c3-1-2-4/h1-2H Key: KFUSEUYYWQURPO-UHFFFAOYAW
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 E: -81 °C
Boiling point	Z: 60.3 °C E: 47.5 °C
Dipole moment	Z (cis): 1.9 D E (trans): 0 D
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
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.

See also

• 1,1-Dichloroethene
• 1,2-Dichloroethane

References

1. ^ Schwarzenbach et al. (2003) Environmental Organic Chemistry, Pub. Wiley Interscience

External links

• International Chemical Safety Card 0436
• NIOSH Pocket Guide to Chemical Hazards 0195