P4O6 is a molecular formula. Its empirical formula is P2O3; tetraphosphorus hexoxide is also called "phosphorus trioxide."
First discovered by Sage in 1777 A.D., phosphorus trioxide has a boiling point of 343.58 degrees Fahrenheit and a melting point of 74.84. It is a colorless solid of crystalline monoclinic form when pure and a waxy solid form when impure. Pure P4O6 is very toxic with a pungent acid odor. When exposed to oxygen or air, it oxidizes to form phosphorus pentoxide. Shaking phosphorus trioxide strongly in cold water causes it to hydrolyze to phosphorus acid.Learn more about Chemistry