Copper(I) chloride is an inorganic chloride of copper in which the metal is in the +1 oxidation state. It has a role as a molluscicide and an agrochemical. It is an inorganic chloride and a copper molecular entity. It contains a copper(1+).

Used as a catalyst, bactericide, mordant and decolorizing agent; applied in metallurgical industry, anti-corrosion and other industries. Used for the determination of carbon monoxide and acetylene in gas analysis.