A phosphate salt is a chemical compound containing the phosphate ion related anions. Phosphates are used in foods as emulsifiers, thickeners, stabilizers, and leavening agents. They also function as preservatives by retaining moisture, preventing fat oxidation, and controlling pH levels to extend shelf life and enhance texture, flavor, and appearance. Foods that commonly contain added phosphates include processed meats, dairy products like processed cheese, baked goods, and soft drinks.  

Phosphate can be also used in fertilizers, cosmetics, animal feed and electronics.