Ethylene dichloride, also known as 1,2-dichloroethane, is a colorless, sweet-smelling liquid used primarily as an industrial solvent and in the production of vinyl chloride, which is a precursor to polyvinyl chloride (PVC). It is produced through the chlorination of ethylene, a common petrochemical. This chemical is classified as a hazardous substance due to its potential health effects, including respiratory issues and liver damage upon prolonged exposure. Ethylene dichloride is also regulated due to its environmental impact, particularly its ability to contaminate groundwater and contribute to air pollution.