Agent Name

Phosphorus pentoxide

CAS Number

1314-56-3

Formula

O5-P2

Major Category

Other Classes

Synonyms

Diphosphorus pentaoxide; Diphosphorus pentoxide; Phosphoric acid anhydride; Phosphoric acid, anhydrous; Phosphoric anhydride; Phosphoric oxide; Phosphoric pentoxide; Phosphorus oxide; Phosphorus oxide (P2O5); Phosphorus pentaoxide; Phosphorus pentoxide; Phosphorus(V) oxide; Phosphorus, oxide, pent-; UN1807; [ChemIDplus] The dimeric form is called tetraphosphorus decaoxide (P4O10). [CHEMINFO]

Category

Phosphorus Compounds

Description

White crystals or powder; Deliquescent; [CHEMINFO]

Sources/Uses

Used as a drying and dehydrating agent, a chemical intermediate, and a catalyst (air blowing of asphalt); Also used in sugar refining; [CHEMINFO]

Comments

Can cause severe burns of skin and eyes; Dust reacts with moisture in respiratory tract to form phosphoric acid; Unaccustomed workers can tolerate 3.6-11.3 mg/m3, but 50-100 mg/m3 was intolerable because of coughing. [CHEMINFO] Inhalation of dust may cause lung edema; [ICSC]

Exposure Assessment
MAK

2 mg/m3, inhalable fraction

Lethal Concentration

LC50 (rat) = 1,217 mg/m3/1H

Explanatory Notes

VP = essentially zero at room temperature; [CHEMINFO]

Adverse Effects
Toxic Pneumonitis

Yes

Dermatotoxin

Skin Burns

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Biomedical References

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Related Information in HazMap
Processes

Industrial Processes with risk of exposure: