FePO4

FePO4 is the chemical formula for iron(III) phosphate. It is an inorganic compound consisting of iron in its +3 oxidation state and phosphate ions. FePO4 typically appears as a white or pale yellow crystalline solid. It is sparingly soluble in water but dissolves in strong acids. This compound exists in several crystalline forms, with the anhydrous form being the most common.

Iron(III) phosphate finds various applications. It is used as a pigment in paints and coatings, contributing to a pale yellow color. In the field of batteries, specifically lithium-ion batteries, iron(III) phosphate serves as a cathode material. Its olivine structure provides good stability and safety. It is also used as a food additive, acting as an anticaking agent and a nutrient supplement, though its use in food is regulated and depends on regional guidelines. In agriculture, it can be a source of iron for plants. The synthesis of FePO4 can be achieved through reactions involving iron salts and phosphate salts.