... alkali. Zinc oxide as chemical additives is usually and widely used in plastic, silicate products, synthetic rubber, lubricants, paint, medicines, ... ” Brand Zinc Oxide is processed by indirect Process, Powder and Granules.in accordance with China national standard (GB/T3185-92) ... White or light yellow powder, density 5.606, melting point 1975 °, is an amphoteric oxide, soluble in acid and alkali, ...