Zinc oxide, an inorganic compound with the chemical formula ZnO, is an oxide of zinc, insoluble in water, ethanol, soluble in acid, ammonium chloride, is a commonly used chemical additive, widely used in the production of plastics, silicate products, synthetic rubber, lubricating oils, paints and coatings, ointments, adhesives, foodstuffs, batteries, flame retardants and other products.