CAS reference

Potassium persulfate

过硫酸钾

Class 5.1 oxidiser. Free-radical initiator for emulsion polymerisation; the major industrial use. Ships in HDPE drums under sealed conditions. Decomposes with heat or moisture; receiver-side storage must be cool and dry. Major Chinese capacity at Yantai Polysciences, Yixing Liheng.

CAS 7727-21-1 ·K2S2O8 ·MW 270.322 g/mol ·HS 283340

Identifiers

Synonyms
Potassium peroxydisulfate, KPS, K2S2O8
Formula
K2S2O8
Molecular weight
270.322 g/mol
SMILES
[K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O
InChIKey
USHAGKDGDHPEEY-UHFFFAOYSA-L
HS code (6-digit)
283340

Transport and hazard profile

Transport classification, UN number UN1492, IMDG Class 5.1, Packing Group III.

GHS hazard statements, Danger. H-codes, H272, H302, H315, H317, H319, H334, 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

  • · Emulsion polymerisation initiator (PVC, PVA, latex)
  • · Hair-dye oxidiser
  • · Etching of printed circuit boards
  • · Wastewater oxidation

Typical Chinese supplier geography

Major Chinese capacity sits in Shandong, Jiangsu. 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 Potassium persulfate 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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Referenced in

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