Description CuO is black powder and used for PCB plated and animals’ feed. In this TDS, it is for industry not feed.CAS No. / 1317-38-0 MW: 79.545 Specifications Typical Property Unit Standard Assay(CuO) % 99.3% min Copper(Cu) % 79.3% min Zinc(Zn) % 30 ppm max Lead(Pb) % 5 min Iron(Fe) % 30 min Nickel(Ni) % 10 min Chloride(Cl) % 15 min Dissolving speed Sec 30 max Insoluble in Acid % 0.003 max Application PCB plated. Packaging and storage 25Kg Paper bag. Keep dry in original closed packaging. Shelf life: more 36 months