CAS reference

Sodium hydroxide

氢氧化钠

Solid 99% caustic ships in 25 kg bags or 1 t big bags; 50% liquid solution ships in IBCs or ISO tanks. Container weight-out before cube-out. Section 301 +25% on US imports. See the caustic soda hub for grade selection, freight maths, and supplier-tier pricing.

CAS 1310-73-2 ·NaOH ·MW 39.997 g/mol ·HS 281511

Identifiers

Synonyms
Caustic soda, Lye, Sodium hydrate
Formula
NaOH
Molecular weight
39.997 g/mol
SMILES
[Na+].[OH-]
InChIKey
HEMHJVSKTPXQMS-UHFFFAOYSA-M
HS code (6-digit)
281511

Transport and hazard profile

Transport classification, UN number UN1823, IMDG Class 8, Packing Group II.

GHS hazard statements, Danger. H-codes, H290, H314. 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

Pre-registered, full registration covered by major producers

US TSCA
Listed

On TSCA Inventory since 1979

China IECSC
Listed
Korea K-REACH
Listed
Australia AICIS
Listed

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

Common applications

  • · Pulp and paper
  • · Aluminum extraction (Bayer process)
  • · Soap and detergent
  • · Water treatment
  • · Petroleum refining

Typical Chinese supplier geography

Major Chinese capacity sits in Shandong, Jiangsu, Inner Mongolia. 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.

Deeper sourcing reference

Cornerstone hub

Sodium hydroxide from China, full sourcing guide

Operator-grade reference covering grade selection, packaging economics, regulatory profile by destination, and the failure modes that catch first-time buyers.

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Sourcing documentation chain

Every shipment of Sodium 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.

Sourcing Sodium hydroxide?

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Our Shanghai team handles the documentation chain for Sodium hydroxide exports out of China. Factory selection, COA verification, DG declaration if applicable, and the duty stack quantified before you commit a deposit.

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Read next

Where this substance shows up across Sourzi

Referenced in

22 pages across the Sourzi moat

This term shows up in 5 regulatory pages, 1 topic clusters, 16 chemical parks. Sample backlinks per content type below.

Regulatory (5)

Plus 2 more regulatory pages.

Topic cluster (1)

Park (16)

Plus 13 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.