Zinc oxide 1>.Grade: 99.7% 2>.Appearance: light yellow or white powder 3>.Specification standard value ZnO: 99.7% min. PbO (As Pb): 0.037% max. CuO (As Cu): 0.0002% max. Manganese (As Mn): 0.0001% max. Zinc (As Zn): none Insoluble matter in HCL: 0.006% max. Loss on ignition: 0.2% max. Retention on sieve (320 meshes): 0.1% max. Soluble matter in water: 0.10% Volatile at 1050癈: 0.3% max. 4>.Packing: 25kg plastic woven bags