H.S.Code 28170010 CAS No. 1314-13-2 Molecular Formula ZnO Molecular wt 81.83 Production standard Q/SNBJ4-2006 Index Request ZnO 99.7% min Zn 0 45μm sieve residue 0.1% max MnO 0.0001% max PbO 0.037% max CuO 0.0002% max Loss on Ignition 0.3% max Water Soluble matter 0.1% max HCl Insoluble matter 0.006% max