... Density: 6.313 Melting Point: 1326 degree C Specification: (Electroplate Class-active copper oxide) CuO: ≥98.5% Zn: ≤200ppm Fe: ≤100ppm ... rate 11.80KJ/mol, hardness 3.4, dielectric constant 18.10. It doesn’t dissolve in water, but dissolves is in ... .10Residue on sieve (150um ) ≤ ,% 0.10Residue on sieve (300um ) ,≤ %0.10 Copper Oxide 1317-38-0 Electronic class