Nomenclature
CAS number: 75-35-4
1,1-Dichloroethene; 1,1-dichloroethylene;
asym-dichloroethylene.
C
2H
2Cl
2; mol wt 96.94.
C 24.78%, H 2.08%, Cl 73.14%.
CH
2=CCl
2.
Description and references
Prepn from ethylene chloride: Reilly, US 2140548 (1938 to Dow); by dehydrochlorination of 1,1,2-trichloroethane: Conrad,
Gould, US 2989570 (1961 to Ethyl Corp.). Review of production, properties
and uses: D. S. Gibbs et al. in Kirk-Othmer Encyclopedia of Chemical Technology vol. 23 (Wiley-Interscience, New York, 3rd ed., 1982) pp 764-798;
of toxicology and human exposure: Toxicological
Profile for 1,1-Dichloroethene (PB 95-100152, 1994) 200
pp.
Properties
Liquid. Mild, sweet odor resembling that of chloroform.
Flammable. d420 1.2129. mp 122.5°. bp760 31.7°. nD20 1.4249. Practically insol in water.
Sol in organic solvents. At temps >0° and especially in the presence
of oxygen or other suitable catalysts polymerizes to a plastic. Several
inhibitors to preserve the monomer have been invented. Uncontrolled
polymerization may lead to explosive reaction products with oxygen
or ozone: Reinhardt, Chem. Eng. News 25, 2136 (1947).Caution
Potential symptoms of overexposure
are irritation of eyes, skin, throat; dizziness, headache, nausea;
dyspnea; liver and kidney dysfunction; pneumonitis. Potential occupational
carcinogen. See NIOSH Pocket Guide
to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 332; Patty's Industrial Hygiene and Toxicology vol. 2E, G. D. Clayton, F. E. Clayton, Eds. (John Wiley
& Sons, Inc., New York, 4th ed., 1994) pp 4181-4189.Use
Intermediate in the production of “vinylidene polymer
plastics” such as
Saran.