... White Dry Powder & Granules 2) Purity:99.7% & 99.5% 3) Use: Rubber,Food , Chemicals... 4) Packing: 25kg 5) ISO9001 Zinc oxide (ZnO), commonly ... oxide has large bandgap and exciton binding energy, high transparency and excellent performance of in normal temp., so ... soluble in acid and alkali, insoluble in water or ethanol. High temperature, yellow, white, cold recovery. Packaging and transportation: ...