Name: Phosphorus Pentoxide

English name: phosphorus pentoxide

Other name: Phosphorus oxide

Chemical formula: P2O5

Molecular weight: 141.94

CAS Registry Number: 1314-56-3

EINECS accession number: 215-236-1

Melting point: 340℃

Boiling point: 360 °C (sublimation)

Water solubility: soluble in water

Dense degree: 2.39 g/cm3

External view: white powder, smell of garlic

Flash point: unknown

Application: desiccant, widely used

Hazard description: Toxic, corrosive, easy to explode in contact with organic matter

Category: Corrosive items

Function and purpose

Used as a desiccant for gases and liquids; as a dehydrating agent for organic synthesis, an antistatic agent for polyester resin, a refined preparation for medicines and sugar. It is the raw material for preparing high-purity phosphoric acid, phosphate, phosphide and phosphate ester. It can also be used in the manufacture of phosphorus pentoxide sol and H-type aerosol. Used in the manufacture of optical glass, ultraviolet transparent glass, heat insulating glass, crystallized glass and opal glass, etc., to improve the dispersion coefficient of the glass and the ability to transmit ultraviolet rays. Used as a desiccant, dehydrating agent, refined preparation of sugar, and used in the preparation of phosphoric acid, phosphorus compounds and aerosols, used as a semiconductor silicon dopant source, dehydrating desiccant, organic synthesis condensing agent and surface active agent. It is often used in junior high school chemistry to test the mass fraction of oxygen in the air.