CAS 7727-37-9 · TSCA · United States of America

Nitrogen (N2) under TSCA

N2 · 氮气

Status: Listed. Nitrogen is on the TSCA Inventory and currently listed as TSCA Active. **No OSHA PEL specifically established for nitrogen** at 29 CFR 1910.1000 Table Z-1 (simple asphyxiant; verify against https://www.osha.gov/annotated-pels before relying). **NIOSH does not assign a specific REL for simple asphyxiants** (verify against cdc.gov/niosh). 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 nitrogen** (N2 itself is not a tradable customs commodity at scale). **Food-grade GRAS** under 21 CFR 184.1540 (verify against https://www.ecfr.gov/ before relying); USP / NF monograph applies for medical N2. 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 nitrogen lane: **No OSHA PEL specifically established (simple asphyxiant) + GRAS 21 CFR 184.1540 + USP / NF medical N2**. NOT on Cal Prop 65. NO direct US AD/CVD. **N2 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 Nitrogen (N2) (CAS 7727-37-9), N2
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: Press. Gas (compressed) or Press. Gas (refrigerated liquefied) + simple-asphyxiant
  • No OSHA PEL specifically established (simple asphyxiant; verify against https://www.osha.gov/annotated-pels)
  • NIOSH: no specific REL (simple asphyxiant; verify against cdc.gov/niosh)
  • 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 1066 Class 2.2 (compressed) or UN 1977 Class 2.2 (refrigerated liquefied)
  • **Food-grade GRAS** 21 CFR 184.1540 (verify against https://www.ecfr.gov/)
  • **USP / NF monograph** applies for medical N2
  • IARC: Not classified

Restrictions and conditions of use

  • NO direct US AD/CVD on nitrogen (not a tradable customs commodity at scale)
  • No OSHA PEL specifically established (simple asphyxiant)
  • Food-grade GRAS 21 CFR 184.1540 plus USP / NF medical N2

Importer obligations

TSCA self-certification regime. **N2 is not typically merchant-imported at scale; market is dominated by domestic captive ASU on-site supply or pipelines from regional industrial-gas majors.** 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 (Press. Gas + simple-asphyxiant)
  • CBP Form 7501 with HS 280430
  • CDR filing every 4 years
  • DOT documentation for UN 1066 / UN 1977 Class 2.2
  • 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 (simple asphyxiant)
  • NO direct US AD/CVD on N2
  • Food-grade GRAS 21 CFR 184.1540 plus USP / NF medical N2
  • 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 nitrogen (n2), see the CAS 7727-37-9 sourcing reference.

For grade-by-grade buying notes, freight maths, supplier-tier pricing, and a worked landed-cost example, the nitrogen (n2) 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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