1) White Dry Powder & Granules 2) Purity:99.7% & 99.5% 3) Use: Rubber,Food , Chemicals... 4) ... diodes . In addition, micro particles of zinc oxide is a kind of nano-materials to work on some relevant ... , pay attention to moisture during storageand transportItemsContentPurity (zno)99.70 min99.50 minMetal (Zn)00PbO %≤0.0370. ... pharmacy, Glass, cement, Food, electronic, Zinc Oxide 99.7% 99.5% (manufature)