CAS 110-82-7 · TSCA · United States of America

Cyclohexane under TSCA

C6H12 · 环己烷

Status: Listed. Cyclohexane is on the TSCA Inventory and is currently listed as TSCA Active. **OSHA PEL 300 ppm 8-hr TWA** at 29 CFR 1910.1000 Table Z-1 (verify against https://www.osha.gov/annotated-pels). 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). **TRI Section 313 listed**. NO active US AD/CVD case on Chinese-origin cyclohexane currently (verify against https://access.trade.gov/ before invoicing). Section 301 List 3 25% additional duty applies on Chinese-origin cyclohexane (HS 290211). Major US domestic producers: ExxonMobil, Phillips 66 / CP Chem, Chevron Phillips, Shell Chemicals (verify each company-site pair against the producer's public website).

US cyclohexane lane: **OSHA PEL 300 ppm plus TRI Form R plus Section 301 plus NFPA 30**. NOT on Cal Prop 65. NO active US AD/CVD case. Major US producers: ExxonMobil, Phillips 66 / CP Chem, Chevron Phillips, Shell Chemicals.

Listing and threshold

Substance Cyclohexane (CAS 110-82-7), C6H12
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: GHS H225 / H304 / H315 / H336 / H400 / H410
  • OSHA PEL 29 CFR 1910.1000 Table Z-1: 300 ppm 8-hr TWA (per https://www.osha.gov/annotated-pels)
  • NIOSH REL: 300 ppm 8-hr TWA (verify against https://www.cdc.gov/niosh/npg/)
  • 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 https://oehha.ca.gov/proposition-65/proposition-65-list before relying on negative listing)
  • **TRI Section 313 listed**: Form R annual reporting required for facilities above thresholds
  • DOT 49 CFR 172.101: UN 1145, Class 3, PG II
  • IARC: Group 3

Restrictions and conditions of use

  • OSHA-compliant SDS and workplace HazCom training required
  • NO active US AD/CVD case on Chinese-origin cyclohexane currently
  • Section 301 List 3 25% additional duty applies on Chinese-origin cyclohexane (HS 290211)
  • **TRI Form R annual reporting**
  • NFPA 30 Flammable and Combustible Liquids Code applies for storage

Importer obligations

TSCA self-certification regime. Dominant practitioner-facing layer is **OSHA PEL 300 ppm + TRI Form R + Section 301 + NFPA 30 storage**. NO active AD/CVD case. Major US producers: ExxonMobil, Phillips 66 / CP Chem, Chevron Phillips, Shell Chemicals.

Required documents

  • TSCA Section 13 Import Certification on customs entry
  • OSHA SDS reflecting H225 / H304 / H315 / H336 / H400 / H410
  • CBP Form 7501 with HS 290211 and Section 301 List 3 25% duty
  • TRI Form R annual report
  • CDR filing every 4 years
  • NFPA 30 storage tank documentation

Common compliance traps

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

  • **OSHA PEL 300 ppm + TRI Form R**
  • Aquatic Chronic 1 wastewater-discharge concern
  • NO active AD; Section 301 List 3 25% duty applies
  • Major US producers: ExxonMobil, Phillips 66 / CP Chem, Chevron Phillips, Shell Chemicals

Where to read next

For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for cyclohexane, see the CAS 110-82-7 sourcing reference.

For grade-by-grade buying notes, freight maths, supplier-tier pricing, and a worked landed-cost example, the cyclohexane 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

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