Vinyl chloride h2c chcl the starting material used in the industrial preparation of poly vinyl chloride is prepared by a two step process that begins with the reaction of cl2 with ethylene to yield 1 2 dichloroethane. Cl2 g h2c chcl g. At room temperature vcm is a gas with a sweet ethereal odor but in industrial processes it is most often handled as a liquid melting point 13 c.
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