Phosphorus pentoxide is a chemical compound with the formula P2O5. It consists of two phosphorus atoms and five oxygen atoms. This white, crystalline solid is primarily used as a dehydrating agent in various chemical reactions and processes. It can absorb moisture from the air, making it useful in laboratories and industrial applications. In addition to its role as a dehydrating agent, phosphorus pentoxide is also used in the production of phosphoric acid and other phosphorus-containing compounds. It is important in the manufacture of fertilizers, glass, and ceramics, contributing to various industries that rely on phosphorus chemistry.