... of zinc by oxidation. Insoluble in water, soluble in acid and alkali. Zinc oxide as chemical additives is usually ... plastic, silicate products, synthetic rubber, lubricants, paint, medicines, adhesives, food, batteries, flame retardants and other relevant fields. Zinc oxide has ... melting point 1975 °, is an amphoteric oxide, soluble in acid and alkali, insoluble in water or ethanol. High temperature, ...