<unk>  is an organochloride with the formula H2C=CHCl that is also called<unk>  monomer <unk> M) or chloroethene. This colorless compound is an important industrial chemical chiefly used to produce the polymer polyvinyl<unk>  (PVC). About 13 billion kilograms are produced annually.<unk> M is among the top twenty largest petrochemicals (petroleum-derived chemicals) in world production. The United States currently remains the largest<unk> M manufacturing region because of its low-production-cost position in<unk>  and ethylene raw materials. China is also a large manufacturer and one of the largest consumers of<unk> M.<unk>  is a gas with a sweet odor. It is highly toxic, flammable, and carcinogenic. It can be formed in the environment when soil organisms break down chlorinated solvents.<unk>  that is released by industries or formed by the breakdown of other chlorinated chemicals can enter the air and drinking water supplies.<unk>  is a common contaminant found near landfills. In the past<unk> M was used as a refrigerant.
Vinyl chloride
Triphenylchloroethylene
Coal tar
Heptachlor
Hydrogen fluoride
Triphenylbromoethylene
Naphthalene
Butylated hydroxytoluene