Tags: Chemical Compound, Chemical Substance.
Phosphorus trioxide is the chemical compound with the molecular formula P4O6. Although it should properly be named tetraphosphorus hexoxide the name phosphorus trioxide preceded the knowledge of the compound’s molecular structure and its usage continues today. This colorless solid is structurally related to adamantane. It is formally the anhydride of phosphorous acid H3PO3 but cannot be obtained by the dehydration of the acid. It is a white waxy crystalline and highly toxic solid.