Phosphorus oxide

Phosphorus oxide can refer to:


 * Phosphorus pentoxide (phosphorus(V) oxide, phosphoric anhydride), P2O5
 * Phosphorus trioxide (phosphorus(III) oxide, phosphorous anhydride), P2O3
 * Phosphorus tetroxide, P2O4
 * Several other, less common, oxides of phosphorus, including P4O7, P4O8, P4O9, and P2O6

Gases:
 * Phosphorus monoxide, PO
 * Phosphorus dioxide, PO2