... 1)CuO%,98%;Cu,78.2% 2)Package,25kg/bag 3)Usage,Ferrite magnetic material copper oxide powder price for circuit ... ). Relative density 6.315, melting point 1446 °C, Mohs hardness 3-4, dielectric constant 18.10, insoluble in water, soluble in ... , glass, ceramic, enamel, paint industry, agent for take away,3)fungicides, solar heat absorber surface, reducing tobacco tar, artificial rainfall materials,etc ...