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. This compound is commonly used as a solvent and in the production of other chemicals. It is important in various industrial applications, including the manufacturing of polyvinyl chloride (PVC) and as an intermediate in organic synthesis. Proper handling and safety measures are essential due to its potential health effects.