CAS 1314-56-3 · K-REACH · Republic of Korea

Phosphorus pentoxide (P2O5) under K-REACH

P2O5 (P4O10) · 五氧化二磷

Status: Registered. Phosphorus pentoxide is registered under K-REACH. **Korea TCCA Toxic Chemicals list status: verify the current TCCA Toxic Chemicals list entry against the most recent National Institute of Chemical Safety (NICS) toxic-chemical database before relying**. NOT on Korean Drug Management Act precursor list. NO active Korean AD/CVD case on Chinese-origin P2O5 currently. Korea has limited domestic P2O5 production; structurally net-importer for laboratory + chemical synthesis sectors. KCFTA preferential zero-duty applies for Chinese-origin imports.

K-REACH treats P2O5 as a registered substance with **TCCA Toxic Chemicals scheduling potentially applicable** (verify against NICS database). Korea limited domestic production; structurally net-importer. NO active Korean AD/CVD case. **P2O5 distinguishing pattern across all 5 regimes**: Production via combustion of yellow phosphorus batch 82 in dry air at ~300 C yielding P4O10 vapour, then condensed to crystalline P2O5 + alongside phosphorus chain (yellow P → P2O5 → H3PO4 thermal-process H3PO4 alternative to wet-process via phosphate rock) + drying / dehydrating agent in laboratory + chemical synthesis (cellulose dehydration, sugar fermentation, alkene polymerisation initiator, esterification catalyst) plus glass / ceramic flux plus phosphate-fertiliser P2O5-equivalent reporting unit plus fire-retardant downstream chains + moderate-to-high hazard profile across regimes (Skin Corr. 1A + Eye Dam. 1 + STOT SE 3 + violent water-reaction; UN 1807 Class 8 PG II) + IARC not classified + China Catalog of Hazardous Chemicals + Hazardous Chemicals Operation Permit + China VAT export rebate.