Cuprous ChlorIde

Cuprous chloride, or copper(I) chloride (CuCl), is an inorganic compound that appears as a white, crystalline solid, although impure or aged samples often take on a green hue due to oxidation to copper(II) chloride in moist air. It is a covalent, water-insoluble compound with a cubic crystal structure that is highly valued for its role as a catalyst in various chemical reactions, including the industrial production of silicone polymers, dyes, and pigments such as phthalocyanine blue.