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Molecular formula: CuCl
I. Physical and chemical properties: white or off-white powder, specific gravity 4.14, melting point 430 ° C, iron-gray when melted. When exposed to air, it quickly oxidizes into basic salt, which turns green. It turns brown when exposed to light. Insoluble in water, sulfuric acid, dilute nitric acid And alcohol. Soluble in ammonia, concentrated hydrochloric acid and alkali metal chloride solution to form complexes. Rapidly hydrolyzed to red in hot water to form copper oxide hydrate. It reacts slowly with strong acids and can absorb CO to form complexes.