Dichloroethylenes

**Definition:** Toxic chlorinated unsaturated hydrocarbons. Include both the 1,1- and 1,2-dichloro isomers. Both isomers are toxic, but 1,1-dichloroethylene is the more potent CNS depressant and hepatotoxin. It is used in the manufacture of thermoplastic polymers.

**Tree numbers:** - D02.455.326.271.367.300 - D02.455.526.439.350

**Synonyms:** - Vinylidene Chlorides