... formula: CuOMolecular weight: 79.55Characters: Copper oxide is black to brown amorphous powder or crystalline particles (monoclinic crystals). Relative density ... , ceramic, enamel, paint industry, agent for take away, fungicides, solar heat absorber surface, reducing tobacco tar, artificial rainfall materials,etc ... insoluble ≤%0.010.20.2Cl¯ ≤%0.010.20.2 High quality black copper oxide plating grade