CAS 1310-58-3

Potassium hydroxide

氢氧化钾

KOHMW 56.108 g/molHS 281520 UN1813 · Class 8 · PG II

From the buying desk

Solid (90% min) and 50% solution forms both common. KOH is more expensive per equivalent alkalinity than NaOH so non-K-specific applications default to NaOH. K-specific uses (potassium soaps, biodiesel, alkaline batteries) drive the demand for KOH. Major Chinese capacity at Befar, OCI, and Anhui Hongsifang.

Import Card

Before you order potassium hydroxide 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
Caustic potash, Lye (potassium)
Formula
KOH
Molecular weight
56.108 g/mol
SMILES
[K+].[OH-]
InChIKey
KWYUFKZDYYNOTN-UHFFFAOYSA-M
HS code (6-digit)
281520

Transport and hazard profile

Transport classification, UN number UN1813, IMDG Class 8, Packing Group II.

GHS hazard statements, Danger. H-codes, H290, H302, H314. Refer to the substance SDS Section 2 for the full classification.

US and Australian rules for Potassium hydroxide

Read from the official lists by CAS 1310-58-3. Screening only: check the source before you ship, store or report.

California Prop 65

No entry

No entry for CAS 1310-58-3 in the OEHHA list dated July 31, 2026.

Open the tool · Official source

OSHA exposure limit

No entry

No entry for CAS 1310-58-3 in 29 CFR 1910.1000 Tables Z-1 to Z-3.

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Australian exposure standard

Listed

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

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CERCLA reportable quantity

Listed

Reportable quantity 1,000 lb (454 kg). A package holding this much needs RQ on the shipping paper.

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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

  • · Potassium soaps and detergents
  • · Biodiesel (transesterification catalyst)
  • · Alkaline battery electrolyte
  • · Fertiliser intermediate

Typical Chinese supplier geography

Major Chinese capacity sits in Shandong, Anhui. 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 hydroxide 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

12 pages across the Sourzi moat

This term shows up in 5 regulatory pages, 7 chemical parks. Sample backlinks per content type below.

Regulatory (5)

Plus 2 more regulatory pages.

Park (7)

Plus 4 more chemical parks.

Free download

Free PDF: the MSDS verification template Sourzi runs against the supplier sheet for every CAS number we book out of China.