Cis-dichloroethene, also known as cis-1,2-dichloroethene, is a chemical compound with the formula C₂H₂Cl₂. It consists of two chlorine atoms attached to a two-carbon ethene backbone, with the chlorine atoms positioned on the same side of the double bond. This configuration gives it distinct physical and chemical properties compared to its trans isomer. Cis-dichloroethene is primarily used as an industrial solvent and in the production of other chemicals. It is important in various applications, including dry cleaning and chemical synthesis. Due to its potential environmental and health impacts, proper handling and regulation are essential.