CAS 7782-44-7 · TSCA · United States of America

Oxygen (O2) under TSCA

O2 · 氧气

Status: Listed. Oxygen is on the TSCA Inventory and currently listed as TSCA Active. **No OSHA PEL specifically established for oxygen** at 29 CFR 1910.1000 Table Z-1 (oxygen-enriched-atmosphere fire-acceleration hazard governs handling rather than toxic exposure; verify against https://www.osha.gov/annotated-pels before relying). NOT on EPA RMP threshold list. NOT on DEA scheduling. NOT on California Proposition 65 (verify against OEHHA https://oehha.ca.gov/proposition-65/proposition-65-list before relying on negative listing). **NO direct US AD/CVD on oxygen** (O2 itself is not a tradable customs commodity at scale). **Food-grade GRAS** under 21 CFR 184.1259 (verify against https://www.ecfr.gov/ before relying); USP / NF monograph applies for medical O2; FDA regulates medical-grade O2 as a drug under FDA Modernization Act 1997. Major US domestic industrial-gas producers: Linde plc Bridgewater New Jersey + Praxair (now part of Linde) US operations, Air Products and Chemicals Allentown Pennsylvania, Air Liquide Houston Texas operations, Messer Group US operations, Matheson Tri-Gas Basking Ridge New Jersey (verify each company-site pair against the producer's public website before relying).

US oxygen lane: **No OSHA PEL specifically established (oxygen-enriched-atmosphere fire-acceleration hazard governs handling) + GRAS 21 CFR 184.1259 + USP / NF medical O2 (FDA drug regulation) + Class 2.2 + 5.1 oxidiser transport**. NOT on Cal Prop 65. NO direct US AD/CVD. **O2 is not merchant-imported at scale; market is captive ASU**. Major US producers: Linde plc, Air Products, Air Liquide, Messer Group, Matheson Tri-Gas.

Listing and threshold

Substance Oxygen (O2) (CAS 7782-44-7), O2
Regime US Toxic Substances Control Act (TSCA), administered by EPA
Jurisdiction United States of America
Status Listed
Tonnage threshold CDR threshold: 25,000 lb manufactured or imported per site per year

Classifications under this regime

  • OSHA HCS: Ox. Gas 1 + Press. Gas (compressed) or Press. Gas (refrigerated liquefied)
  • No OSHA PEL specifically established (oxygen-enriched-atmosphere fire hazard governs handling; verify against https://www.osha.gov/annotated-pels)
  • NOT subject to TSCA Section 6 Risk Evaluation
  • NOT on EPA RMP threshold list
  • NOT on DEA List I or List II
  • NOT on California Proposition 65 list (verify against OEHHA before relying on negative listing)
  • DOT 49 CFR 172.101: UN 1072 Class 2.2 + 5.1 (compressed) or UN 1073 Class 2.2 + 5.1 (refrigerated liquefied)
  • **Food-grade GRAS** 21 CFR 184.1259 (verify against https://www.ecfr.gov/)
  • **USP / NF monograph** applies for medical O2; FDA regulates medical-grade O2 as a drug
  • IARC: Not classified

Restrictions and conditions of use

  • NO direct US AD/CVD on oxygen (not a tradable customs commodity at scale)
  • No OSHA PEL specifically established (oxygen-enriched-atmosphere fire hazard)
  • Food-grade GRAS 21 CFR 184.1259 plus USP / NF medical O2 (FDA regulates as drug)

Importer obligations

TSCA self-certification regime. **O2 is not typically merchant-imported at scale; market is dominated by domestic captive ASU on-site supply.** Major US producers: Linde plc Bridgewater NJ + Praxair operations, Air Products Allentown PA, Air Liquide Houston TX, Messer Group, Matheson Tri-Gas Basking Ridge NJ.

Required documents

  • TSCA Section 13 Import Certification on customs entry (where applicable)
  • OSHA SDS (Ox. Gas 1 + Press. Gas + fire-acceleration handling)
  • CBP Form 7501 with HS 280440
  • CDR filing every 4 years
  • DOT documentation for UN 1072 / UN 1073 Class 2.2 + 5.1
  • FDA / USP / NF certifications for food and medical grades

Common compliance traps

The pitfalls that have bitten importers on this lane in the past. None of these is theoretical.

  • No OSHA PEL specifically established (oxygen-enriched-atmosphere fire hazard governs handling)
  • NO direct US AD/CVD on O2
  • Food-grade GRAS 21 CFR 184.1259 plus USP / NF medical O2 (FDA regulates as drug)
  • Class 2.2 + subsidiary 5.1 oxidiser transport
  • Major US producers: Linde / Praxair, Air Products, Air Liquide, Messer Group, Matheson Tri-Gas

Where to read next

For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for oxygen (o2), see the CAS 7782-44-7 sourcing reference.

For grade-by-grade buying notes, freight maths, supplier-tier pricing, and a worked landed-cost example, the oxygen (o2) cornerstone hub covers the full sourcing chain.

For the structure and history of TSCA, see the TSCA glossary entry.

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Read next

Cross-jurisdiction profile and sourcing references

Referenced in

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