... Dry Powder & Granules 2) Purity:99.7% & 99.5% 3) Use: Rubber,Food , Chemicals... 4) Packing: 25kg 5) ISO9001 Zinc oxide ... white, is an outcome of zinc by oxidation. Insoluble in water, soluble in acid and alkali. Zinc oxide as chemical additives is usually ... 606, melting point 1975 °, is an amphoteric oxide, soluble in acid and alkali, insoluble in water or ethanol. High temperature, yellow, white, cold ...