CAS reference

Oxygen

氧气

Compressed gas (Class 2.2 with 5.1 oxidiser sub-risk). Trade is overwhelmingly local because shipping cost dwarfs gas cost. International trade limited to medical-grade liquid oxygen and specialty research-grade. China-produced oxygen rarely exported outside specialty uses.

CAS 7782-44-7 ·O2 ·MW 31.998 g/mol ·HS 280440

Identifiers

Synonyms
Molecular oxygen, Dioxygen, O2
Formula
O2
Molecular weight
31.998 g/mol
SMILES
O=O
InChIKey
MYMOFIZGZYHOMD-UHFFFAOYSA-N
HS code (6-digit)
280440

Transport and hazard profile

Transport classification, UN number UN1072, IMDG Class 2.2.

GHS hazard statements, Danger. H-codes, H270, H280. 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

  • · Steel production (basic oxygen furnace)
  • · Medical oxygen
  • · Welding and cutting
  • · Wastewater aeration
  • · Semiconductor (high purity)

Sourcing documentation chain

Every shipment of Oxygen 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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Where this substance shows up across Sourzi

Referenced in

5 pages across the Sourzi moat

This term shows up in 5 regulatory pages. Sample backlinks per content type below.

Regulatory (5)

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