Zinc Oxide USP is mainly used in food industry as a dietary ingredient and as a nutrient. Zinc is an important antioxidant nutrient. It is necessary for protein synthesis, wound healing, for blood stability, normal tissue function, and aids in the digestion and metabolism of phosphorus. It also governs the contractility of muscles and maintains the body's alkaline balance. Zinc Oxide is also used in a variety of products like plastics, ceramics, glass, cement, rubbers, paints, pigments, lubricants, adhesives, sealants, batteries, ferrites, flame-retardant, and bandages. It is commonly used in personal care products like baby powders, diaper rash creams, calamine creams, antiseptic ointments, and anti-dandruff shampoos and sunscreens. It is used as an additive in the production of concrete, and as an additive in food products (breakfast cereals).USP, or United States Pharmacopeia, grade chemicals comply with the standards of the United States Pharmacopeia and National Formulary (USP-NF). USP Grade chemicals are fit for use in food, drugs, and medicines. They are subject to stringent testing and are typically required to have the highest level of purity. Specifications ZnO: 99.9 Min Lead Pb: 0.002 Max Cadmium Cd: 0.001 Max Iron Fe: 0.0005 Max Copper Cu : 0.0003 Max Tin Sn: 0.0001 Max Zinc Zn: 80.26 Min Manganese Mn: 0.0001 Max Chromium Cr: 0.0001 Max Cobalt Co:0.0001 Max Mercury Hg:0.0001 Max Molybdenum Mo:0.0001 Max Nickel Ni:0.0001 Max Selenium Se:0.0001 Max Meet USP Standard Packing 55.115 lb bag, 40 bags per pallet