CAS 7664-41-7 · TSCA · United States of America

Ammonia (anhydrous) under TSCA

NH3 · 氨

Status: Listed. Ammonia is on the TSCA Inventory and is currently listed as TSCA Active. **OSHA PEL 50 ppm 8-hr TWA** (verified V30 audit against https://www.osha.gov/annotated-pels/table-z-1; 35 mg/m3 8-hr TWA, 35 ppm STEL). NOT on California Proposition 65 list (verified V30 audit against https://oehha.ca.gov/proposition-65/proposition-65-list). **TRI Section 313 listed**: Form R annual reporting required. **EPA RMP threshold reportedly 10,000 lb anhydrous** (regulated toxic + flammable substance; verify against EPA 40 CFR 68.130 List of Regulated Substances at https://www.epa.gov/rmp before invoicing as eCFR text not directly verified in this audit). **DEA: NOT formally scheduled but anhydrous ammonia retail sales subject to CMEA 2005 retail restrictions** (methamphetamine precursor concern; verify against current DEA / 21 USC 830 retail-restriction text before relying). NO active US AD case on Chinese-origin ammonia currently (verify against access.trade.gov before invoicing). Section 301 List 3 25% additional duty reportedly applies on Chinese-origin ammonia HS 281410 (verify against USTR Section 301 lists at https://ustr.gov/issue-areas/enforcement/section-301-investigations and CBP HTS at https://hts.usitc.gov before invoicing). **US is structurally net-EXPORTER of ammonia** through CF Industries (Donaldsonville Louisiana, a leading single-site ammonia complex with integrated upstream urea plus AN plus DEF urea-solution chain; verify the most recent ammonia nameplate against the CF Industries corporate site before quoting world-largest rank or a specific Mt/yr figure), Nutrien (Borger Texas + Geismar Louisiana), Koch Industries / Koch Fertilizer (Beatrice Nebraska + Enid Oklahoma), Yara North America.

The US ammonia lane is dominated by **EPA RMP threshold (reportedly 10,000 lb anhydrous; verify against 40 CFR 68.130 at https://www.epa.gov/rmp) + TRI Form R + CMEA 2005 retail restrictions + DHS CFATS chemical security**. NO active US AD/CVD case (verify against access.trade.gov). Section 301 List 3 25% additional duty reportedly applies (verify against USTR Section 301 lists at https://ustr.gov/issue-areas/enforcement/section-301-investigations and CBP HTS at https://hts.usitc.gov before invoicing). **US is structurally net-EXPORTER**: CF Industries Donaldsonville Louisiana (a leading single-site ammonia complex; verify the most recent nameplate against the CF Industries corporate site before quoting world-largest rank or a specific Mt/yr figure), Nutrien, Koch Industries / Koch Fertilizer, Yara North America. US shale gas advantage drives Haber-Bosch cost-competitiveness. Russian + Belarusian ammonia (TogliattiAzot pipeline + Yuzhny port + Acron + EuroChem + Grodno Azot) under Russia-sanctions concern from 2022 reshaping global supply.

Listing and threshold

Substance Ammonia (anhydrous) (CAS 7664-41-7), NH3
Regime US Toxic Substances Control Act (TSCA), administered by EPA
Jurisdiction United States of America
Status Listed
Tonnage threshold CDR (Chemical Data Reporting) threshold: 25,000 lb (11,340 kg) manufactured or imported per site per year

Classifications under this regime

  • OSHA Hazard Communication Standard (HCS): GHS H221 / H314 / H331 / H335 / H400
  • OSHA PEL 29 CFR 1910.1000 Table Z-1: 50 ppm 8-hr TWA (per https://www.osha.gov/annotated-pels)
  • NIOSH REL: 25 ppm 8-hr TWA, 35 ppm STEL (verify against https://www.cdc.gov/niosh/npg/)
  • **EPA RMP threshold reportedly 10,000 lb anhydrous** (regulated toxic + flammable substance; verify against EPA 40 CFR 68.130 at https://www.epa.gov/rmp before invoicing)
  • NOT subject to TSCA Section 6 Risk Evaluation
  • NOT on TSCA Section 5(a)(2) Significant New Use Rule list
  • NOT on DEA List I or List II (but CMEA 2005 retail restrictions apply for anhydrous ammonia; verify against current 21 USC 830 retail-restriction text)
  • NOT on California Proposition 65 list (verified V30 audit against https://oehha.ca.gov/proposition-65/proposition-65-list)
  • **TRI Section 313 listed**: Form R annual reporting required
  • DOT hazardous materials regulation (49 CFR 172.101): UN 1005 / 2073 / 2672, Class 2.3 toxic gas
  • IARC: not assigned (verify against current IARC list-of-classifications at https://monographs.iarc.who.int/list-of-classifications before relying on a negative classification)

Restrictions and conditions of use

  • No TSCA Section 6 use restrictions currently
  • OSHA-compliant SDS and workplace HazCom training required
  • **EPA RMP threshold reportedly 10,000 lb**: Risk Management Plan filing required (verify against 40 CFR 68.130 at https://www.epa.gov/rmp before invoicing)
  • **CMEA 2005 retail restrictions** for anhydrous ammonia (methamphetamine precursor concern; verify against current 21 USC 830 retail-restriction text)
  • NO active US AD/CVD case on Chinese-origin ammonia currently (verify against access.trade.gov before invoicing)
  • Section 301 List 3 25% additional duty reportedly applies on Chinese-origin ammonia HS 281410 (verify against USTR Section 301 lists at https://ustr.gov/issue-areas/enforcement/section-301-investigations and CBP HTS at https://hts.usitc.gov before invoicing)
  • **TRI Form R annual reporting**
  • DHS Chemical Facility Anti-Terrorism Standards (CFATS) for above-threshold ammonia handling facilities

Importer obligations

TSCA is a self-certification regime. The dominant practitioner-facing layer is **EPA RMP 10,000 lb threshold + TRI Form R + CMEA 2005 retail restrictions + DHS CFATS chemical security**. NO active AD/CVD case. Section 301 List 3 25% additional duty applies. **US is structurally net-EXPORTER** through CF Industries (Donaldsonville Louisiana world's largest single-site ~5 Mt/yr; integrated upstream of urea + AN + DEF chain), Nutrien, Koch Industries / Koch Fertilizer, Yara North America. Imports from Chinese supply minimal due to Section 301 + freight + domestic supply abundance.

Required documents

  • TSCA Section 13 Import Certification statement on customs entry
  • OSHA-compliant SDS reflecting H221 / H314 / H331 / H335 / H400 classification
  • Customs entry CBP Form 7501 with HS code 281410 (anhydrous) and Section 301 List 3 25% duty applied
  • **EPA RMP filing** (where site exceeds 10,000 lb threshold)
  • TRI Form R annual report
  • CDR filing every 4 years if site exceeds 25,000 lb/yr threshold
  • DHS CFATS Top-Screen + Site Security Plan for above-threshold facilities

Common compliance traps

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

  • **EPA RMP threshold reportedly 10,000 lb**: Risk Management Plan filing required (verify against 40 CFR 68.130 at https://www.epa.gov/rmp before invoicing)
  • **CMEA 2005 retail restrictions** for anhydrous ammonia (methamphetamine precursor concern; verify against current 21 USC 830 retail-restriction text)
  • **DHS Chemical Facility Anti-Terrorism Standards (CFATS)** for above-threshold ammonia handling facilities (verify CFATS programmatic status at https://www.cisa.gov/chemical-security before relying)
  • **TRI Form R annual reporting**
  • NO active US AD/CVD case on Chinese ammonia currently (verify against access.trade.gov before invoicing)
  • Section 301 List 3 25% additional duty reportedly applies (verify against USTR Section 301 lists at https://ustr.gov/issue-areas/enforcement/section-301-investigations and CBP HTS at https://hts.usitc.gov); structurally lighter than caprolactam batch 14 + acetic acid batch 19 lanes
  • **US is structurally net-EXPORTER**: CF Industries Donaldsonville Louisiana (a leading single-site ammonia complex; verify the most recent nameplate against the CF Industries corporate site before quoting world-largest rank or a specific Mt/yr figure), Nutrien, Koch Industries / Koch Fertilizer, Yara North America. US shale gas advantage drives Haber-Bosch cost-competitiveness
  • Russian + Belarusian ammonia (TogliattiAzot pipeline + Yuzhny port + Acron + EuroChem + Grodno Azot) under broader Russia-sanctions concern from 2022; reshapes global supply

Where to read next

For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for ammonia (anhydrous), see the CAS 7664-41-7 sourcing reference.

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

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

Need cross-jurisdiction compliance support on this substance? Run it through the REACH / TSCA / IECSC / AICIS / K-REACH checker, or send us the substance and the destination and we will quote FOB China and CIF / DDP landed including the regulatory work on the destination side.

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Cross-jurisdiction profile and sourcing references

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