CAS 7782-44-7

Oxygen

氧气

O2MW 31.998 g/molHS 280440 UN1072 · Class 2.2

From the buying desk

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.

Import Card

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

Card for the US Card for Australia

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.

US and Australian rules for Oxygen

Read from the official lists by CAS 7782-44-7. Screening only: check the source before you ship, store or report.

California Prop 65

No entry

No entry for CAS 7782-44-7 in the OEHHA list dated July 31, 2026.

Open the tool · Official source

OSHA exposure limit

No entry

No entry for CAS 7782-44-7 in 29 CFR 1910.1000 Tables Z-1 to Z-3.

Open the tool · Official source

Australian exposure standard

No entry

No entry for CAS 7782-44-7 in the Safe Work Australia workplace exposure standards.

Open the tool · Official source

CERCLA reportable quantity

No entry

No entry for CAS 7782-44-7 in 40 CFR 302.4 as read on September 24, 2026.

Open the tool · Official source

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.

Open the tool · Official source

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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Read next

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)

Plus 2 more regulatory pages.

Free download

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