... with the formula ZnO. It is a white powder that is insoluble in water. The powder is widely used ... glass, cement, rubber, lubricants, paints, ointments, adhesive, sealants, pigments, foods, batteries, ferrites, fire retardants, etc.Rubber manufactureAbout 50% of ZnO ... nutrient. (Other cereals may contain zinc sulfate for the same purpose.) Some prepackaged foods also include trace amounts of ZnO ...