Ammonium Chloride

Cuprous chloride (also known as copper(I) chloride or CuCl) is an inorganic compound, appearing as a white to pale-green crystalline solid. It is a versatile compound crucial in industrial chemistry, primarily functioning as a catalyst in organic synthesis reactions, including the Sandmeyer reaction, Gattermann-Koch reaction, and the polymerization of vinyl monomers. While it is technically insoluble in water, it forms soluble complexes in hydrochloric acid and ammonia solutions.