Phosphoric Anhydride

Name:
Phosphoric Anhydride
Detailed information:

Chemistry name:	phosphorus pentoxide; phosphoric oxide; phosphoric acid, anhydrous
M Formula:	P2O5
Properties:
Soft, white powder. Absorbs moisture from the air with avidity, forming meta-, pyro-, or ortho-phosphoric acid, depending on the amount of water absorbed and upon conditions of absorption. D 2.30, mp 340C, bp sublimes at 360C.
Derivation:
By burning phosphorus in dry air.
Grade:
Technical, nitrogen-complex coated (for slow solution).
Hazard:
Reacts violently with water to evolve heat; dangerous fire risk. Keep tightly sealed or stoppered. Corrosive to skin and tissue.
Use:
Preparation of phosphorus oxychloride and metaphosphoric acid, acrylate esters, surfactants, dehydrating agent, condensing agent in organic synthesis, sugar refining, laboratory reagent, fire extinguishing, special glasses.