The color of zinc oxide is white. Zinc oxide is an inorganic compound with the chemical formula ZnO, which usually appears as a white solid powder. After high temperature calcination, zinc oxide may appear pale yellow. Zinc oxide is insoluble in water, but it can be dissolved in acids and strong bases.
Zinc oxide has many uses. It is widely used in products such as plastics, rubber, lubricants, paints, coatings, adhesives, foods, batteries, flame retardants, etc. In the pharmaceutical field, zinc oxide is used to make ointments and sunscreens because it absorbs ultraviolet radiation. In addition, zinc oxide is also used to make products such as zinc stearate, zinc bromide, zinc borate, phosphating liquid, and can be used to prepare electroplating liquid. In dermatological topical preparations, zinc oxide is used to treat eczema and dermatitis, and has astringent, antiseptic and protective effects.
The preparation method of zinc oxide includes burning zinc or roasting sphalerite (zinc sulfide). It is used as a reinforcing agent and vulcanizing agent in rubber and latex, and is also used to make pigments and fillers. Zinc oxide is also used in the manufacture of chemical products such as phosphating solution, and has good hiding power and tinting power.