Cuprous chloride is a chemical compound with the formula CuCl. It consists of copper in the +1 oxidation state and is typically found as a white or yellowish solid. This compound is sparingly soluble in water but dissolves in concentrated hydrochloric acid, forming a complex ion. Cuprous chloride is used in various applications, including as a catalyst in organic reactions and in the production of copper metal. It also plays a role in the synthesis of other copper compounds and can be found in some photographic processes.