Cis-Dichloroethene (Cis-DCE) is a chemical compound with the formula C₂H₂Cl₂. It is a colorless liquid that is commonly used as a solvent in various industrial applications, including the production of adhesives and coatings. Cis-DCE is one of the isomers of dichloroethene, with the two chlorine atoms positioned on the same side of the double bond. Cis-DCE is important in environmental studies, as it can be found in groundwater and soil due to industrial activities. Its presence can pose health risks, leading to regulations by agencies like the Environmental Protection Agency (EPA) to monitor and manage its levels in the environment.