Zinc Oxide (99.5%) Specification: Molecular formula:ZnO Molecular weight:81.39 ZnO %≥99.5 Metal %≤ - PbO %≤0.05 MnO %≤0.0001 CuO %≤0.0004 Insoluble in Hcl solution %≤0.008 Losses in ignition %≤0.2 Screening residues(through 45um mesh) %≤0.10 Soluble matter in water %≤ 0.10 ...