CAS reference

Phosphorus pentoxide

五氧化二磷

Class 8 corrosive. Reacts violently with water releasing heat and forming phosphoric acid. Ships in sealed HDPE drums with desiccant. Phosphate fertiliser industry is the largest global sink, but most P2O5 is consumed at the producing site rather than shipped. Specialty trade volume small.

CAS 1314-56-3 ·P2O5 ·MW 141.944 g/mol ·HS 280910

Identifiers

Synonyms
P2O5, Phosphoric anhydride, Diphosphorus pentoxide
Formula
P2O5
Molecular weight
141.944 g/mol
SMILES
O=P(=O)OP(=O)=O
InChIKey
DLYUQMMRRRQYAE-UHFFFAOYSA-N
HS code (6-digit)
280910

Transport and hazard profile

Transport classification, UN number UN1807, IMDG Class 8, Packing Group II.

GHS hazard statements, Danger. H-codes, H314, H335. Refer to the substance SDS Section 2 for the full classification.

Regulatory profile across 5 jurisdictions

Verified against ECHA, US EPA TSCA Inventory, MEE China IECSC, NIER K-REACH, and AICIS AIIC. Last verification 2026-04-30. Confirm with the regulator portal before any shipping decision.

EU REACH
Listed
US TSCA
Listed
China IECSC
Listed
Korea K-REACH
Listed
Australia AICIS
Listed

Look up other substances at the REACH / TSCA cross-jurisdiction checker.

Common applications

  • · Drying agent (laboratory)
  • · Phosphate fertiliser intermediate
  • · Optical glass
  • · Catalyst manufacture

Typical Chinese supplier geography

Major Chinese capacity sits in Yunnan, Sichuan, Guizhou. Coastal producers (Shandong, Jiangsu, Zhejiang) typically dominate export volume because of port access; inland producers (Inner Mongolia, Xinjiang, Shaanxi) compete on raw-material cost but add inland-rail or trucking cost to reach the coast.

Sourcing documentation chain

Every shipment of Phosphorus pentoxide from China should include a per-batch COA, a current SDS per GB/T 17519 on the China side and the destination jurisdiction's standard on the import side, a packing list, a bill of lading, and a certificate of origin plus an MSA China DG packing certificate. For Incoterms reference see FOB, CIF, and CFR.

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