... oxidation. Insoluble in water, soluble in acid and alkali. Zinc oxide as chemical additives is usually and widely used in plastic, silicate ... .606, melting point 1975 °, is an amphoteric oxide, soluble in acid and alkali, insoluble in water or ethanol. High temperature, yellow, white ... double-layer packaging 2, the standard package weight: 25kg or 1000kg3, can also be packaged according to user needs ...