... package High purity, professional service Ideal for long-term cooperation copper oxideCAS: 1344-70-3MF: CuOMW: 79 ... magnetic material, enamel coloring, ceramics pigment and copper salt. Application: widely used in glass,pigment ... bag,or according to requirement.Characters : Copper oxide is black to brown amorphous powder or ... 0.10Residue on sieve (300um ) ,≤ %0.10 98% copper oxide (cupric oxide)