1. Molecular formula: CuO 2. Molecular weight: 79. 55 3. Properties: Black or black to brown-black amorphous crystalline powder, not soluble in water and alcohol, soluble in diluted acid, ammonia chloride and potassium cyanide. 4. Packing: 25kg plastic lined woven bag, 50kg iron drum or according to customer's requirement. 5. Usage: Mainly used for electroplating of electricity plate and the production of stainer for glass, ceramic and porcelain. Also, for the production of fireworks, dyes catalysts, lacquer oibased desulfurizing agent and other nantokites.