vinyl chloride
or chloroethyleneColourless, flammable, toxic gas (H2C=CHCl), belonging to the family of organic compounds of halogens. It is produced in very large quantities and used principally to make PVC, as well as in other syntheses and in adhesives. Prolonged exposure to vinyl chloride is linked to several kinds of cancer.
vinyl chloride [′vīn·əl ′klȯr‚īd]
Vinyl Chloride
(CH2=CHC1), a colorless gas with a slight odor resembling that of chloroform; Tb = - 13.8° C; Tm = -153.8° C. Density at -15° C, 0.9730 g/cm3. It is poorly soluble in water but readily soluble in organic solvents. The explosive limit of vinyl chloride in air is 4-22 percent by volume. The double bond in vinyl chloride readily adds halogens, hydrogen halides, and so on:
Vinyl chloride polymerizes and copolymerizes with vinylidene chloride, vinyl acetate, and other substances. In industry it is obtained by vapor-phase (rarely liquid-phase) hydrochlorination of acetylene in the presence of HgCl2 on carbon or by dehydrochlorination of dichloroethane:
The resultant product contains not less than 99 percent vinyl chloride and does not polymerize spontaneously. Vinyl chloride is used extensively to make polyvinyl chloride and copolymers with other vinyl compounds; these are important materials that are used in the most diverse branches of industry.
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