... 2) Purity:99.7% & 99.5% 3) Use: Rubber,Food , Chemicals... 4) Packing: 25kg 5) ISO9001 Zinc oxide (ZnO), commonly ... (GB/T3185-92) and ISO9001-2008Molecular formula: ZnO Molecular Weight: 81.39 Properties: White or ... , pay attention to moisture during storageand transportItemsContentPurity (zno)99.70 min99.50 minMetal (Zn)00PbO %≤0. ... Glass, cement, Food, electronic, Zinc Oxide 99.7% 99.5% (manufature)