The formula for diphosphorus trioxide is P2O3.
Diphosphorus trioxide is a chemical compound that consists of two phosphorus (P) atoms and three oxygen (O) atoms. The prefix ‘di-‘ indicates that there are two phosphorus atoms, while ‘tri-‘ indicates that there are three oxygen atoms. This compound can also be referred to as phosphorus(III) oxide, which reflects the oxidation state of the phosphorus in this compound.