What is Phosphorus Pentoxide

Phosphorus pentoxide is a phosphorous oxide. Phosphorus pentoxide is used as a strong drying and dehydrating agent. Many reactions that require the removal of a water molecule can utilize P2O5 such as the dehydration of amides to nitriles. It is primarily used in making optical glass and heat-insulating glass. In addition, phosphorus pentoxide is a key ingredient to produce pharmaceuticals and pesticides in the pharma and agricultural industry.

  • Synonyms: Phosphoric anhydride, Diphosphorus pentoxide, Phosphorpentoxid, Tetraphosphorus decaoxide, Phosphoric acid anhydride, Phosphoric oxide, Phosphorous pentoxide
  • INCI: Phosphorus Pentoxide
  • Chemical Formula: O10P4
  • CAS Number: CAS 1314-56-3

Product Specifications


Chemical Formula O10P4
CAS Number CAS 1314-56-3
Molar Weight 283,886 g/mol
Specific Gravity 2.39
Melting Point 340 °C
Boiling Point 360 °C

Uses and Applications for Phosphorus Pentoxide


  • Oil & Gas
  • Cleaning
  • Coatings & Construction
  • Cosmetics
  • Polymers

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