... Copper OxideMF: CuOEINECS No.: 215-270-7Place of Origin: Tianjin China (Mainland)Grade Standard: Agriculture Grade, Industrial G...Purity: 89%,98%, 99 ... Oxide Purity:99%, Production following the state standards used in producing glass,ceramic,fire works, etc.Copper OxideItem ... 0.10Residue on sieve (300um ) ,≤ %0.10 2012 hot sale Copper oxide Industrial & Electroplating Grade 99% good manufacturer