CAS 7727-21-1

Potassium persulfate

过硫酸钾

K2S2O8MW 270.322 g/molHS 283340 UN1492 · Class 5.1 · PG III

From the buying desk

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.

Import Card

Before you order potassium persulfate from China, see its register listing, the duty, anti dumping cases and a supplier check on one card, each with its source and date.

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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.

US and Australian rules for Potassium persulfate

Read from the official lists by CAS 7727-21-1. Screening only: check the source before you ship, store or report.

California Prop 65

No entry

No entry for CAS 7727-21-1 in the OEHHA list dated July 31, 2026.

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OSHA exposure limit

No entry

No entry for CAS 7727-21-1 in 29 CFR 1910.1000 Tables Z-1 to Z-3.

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Australian exposure standard

Listed

0.01 mg/m³ as a peak limitation, never to be exceeded.

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CERCLA reportable quantity

No entry

No entry for CAS 7727-21-1 in 40 CFR 302.4 as read on September 24, 2026.

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EPCRA Tier II threshold

No entry

Not on the Extremely Hazardous Substances list, so the general 10,000 lb Tier II threshold applies where an SDS is required.

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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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Read next

Where this substance shows up across Sourzi

Referenced in

19 pages across the Sourzi moat

This term shows up in 5 regulatory pages, 14 chemical parks. Sample backlinks per content type below.

Regulatory (5)

Plus 2 more regulatory pages.

Park (14)

Plus 11 more chemical parks.

Free download

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