CAS 25038-54-4 · TSCA · United States of America

Nylon-6 (polycaprolactam, polyamide-6) under TSCA

(C6H11NO)n · 尼龙-6 / 聚己内酰胺

Status: Listed. Nylon-6 is on the TSCA Inventory and is currently listed as TSCA Active. Light-regulatory profile. NOT on EPA RMP threshold list. NOT on DEA scheduling. NOT on Cal Prop 65 (verified against OEHHA https://oehha.ca.gov/proposition-65/proposition-65-list, May 2026). NOT on TRI Section 313 list. US AD/CVD status on Chinese-origin nylon-6 unverified at audit (verify case status against access.trade.gov https://access.trade.gov/ before invoicing). Section 301 China tariff treatment applies on Chinese-origin nylon-6 under HS 39081000 (verify the current Section 301 list and rate against USTR https://ustr.gov/issue-areas/enforcement/section-301-investigations before invoicing). FDA 21 CFR 177.1500 indirect food-additive applications (parallel to caprolactam batch 14 entry).

The US nylon-6 lane has **light regulatory profile**. Section 301 China tariff applies (verify the current list and rate against USTR https://ustr.gov/issue-areas/enforcement/section-301-investigations before invoicing). Major US producers: AdvanSix (Hopewell Virginia, integrated upstream caprolactam batch 14 + AS batch 12 chain; a leading US caprolactam producer through the joint-product chain, verify world-largest-rank claims against the AdvanSix corporate site) and Honeywell (Frankford Pennsylvania).

Listing and threshold

Substance Nylon-6 (polycaprolactam, polyamide-6) (CAS 25038-54-4), (C6H11NO)n
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): not classified at industrial-grade (polymer)
  • NOT subject to TSCA Section 6 Risk Evaluation
  • IARC: not classified
  • FDA 21 CFR 177.1500 indirect food-additive applications

Restrictions and conditions of use

  • No TSCA-specific use restrictions
  • US AD/CVD status on Chinese-origin nylon-6 unverified at audit (verify against access.trade.gov https://access.trade.gov/ before invoicing)
  • Section 301 China tariff treatment applies on Chinese-origin nylon-6 (HS 39081000); verify the current list and rate against USTR https://ustr.gov/issue-areas/enforcement/section-301-investigations before invoicing

Importer obligations

TSCA is a self-certification regime. Light-regulatory profile. Section 301 China tariff treatment applies (verify the current list and rate against USTR https://ustr.gov/issue-areas/enforcement/section-301-investigations before invoicing). Major US domestic producers: AdvanSix (Hopewell Virginia, integrated upstream caprolactam batch 14 chain + AS batch 12 by-product) and Honeywell (Frankford Pennsylvania) (verify each producer-site pair against the company corporate site before relying).

Required documents

  • TSCA Section 13 Import Certification statement on customs entry
  • Customs entry CBP Form 7501 with HS code 39081000 (nylon-6) and current Section 301 China tariff applied (verify the rate against USTR https://ustr.gov/issue-areas/enforcement/section-301-investigations before invoicing)
  • FDA 21 CFR 177.1500 conformity declaration for food-contact applications

Common compliance traps

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

  • **Light-regulatory profile**: polymer; NOT on TRI, NOT on Cal Prop 65 (verified against OEHHA, May 2026), NOT on RMP, NOT on DEA; US AD/CVD status unverified at audit (verify against access.trade.gov https://access.trade.gov/ before invoicing)
  • Section 301 China tariff applies on HS 39081000 as primary tariff-stack layer (verify the current list and rate against USTR https://ustr.gov/issue-areas/enforcement/section-301-investigations before invoicing)
  • Major US producers: AdvanSix (Hopewell Virginia integrated upstream caprolactam batch 14 + AS batch 12 chain) and Honeywell (Frankford Pennsylvania) (verify each producer-site pair against the company corporate site before relying)
  • US is a substantial domestic producer of nylon-6 through AdvanSix integrated supply (verify net-import or self-sufficiency status against ICIS or S&P Commodity Insights before quoting)

Where to read next

For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for nylon-6 (polycaprolactam, polyamide-6), see the CAS 25038-54-4 sourcing reference.

For grade-by-grade buying notes, freight maths, supplier-tier pricing, and a worked landed-cost example, the nylon-6 (polycaprolactam, polyamide-6) 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.

Read next

Cross-jurisdiction profile and sourcing references

Referenced in

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