CAS 80-62-6 · TSCA · United States of America

Methyl methacrylate (MMA) under TSCA

C5H8O2 · 甲基丙烯酸甲酯

Status: Listed. MMA is on the TSCA Inventory as a grandfathered pre-1979 substance and is currently listed as TSCA Active. **OSHA PEL 100 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**: Form R annual reporting required where site exceeds thresholds. NO active US AD/CVD case on Chinese-origin MMA currently (verify against https://access.trade.gov/ before invoicing). Section 301 List 3 25% additional duty applies on Chinese-origin MMA (HS 291614). Major US domestic producers (verify each company-site pair against the producer's public website before relying): Roehm / Evonik Cologne legacy plus US plant locations (verify), Lucite International / Mitsubishi (Beaumont Texas), Arkema (Bayport Texas).

The US MMA lane is dominated by **OSHA PEL 100 ppm plus Skin Sens. 1 sensitisation surveillance plus TRI Form R plus Section 301 List 3 25% additional duty plus NFPA 30 storage compliance**. NOT on Cal Prop 65, NOT on RMP, NOT on DEA. NO active US AD/CVD case. Major US producers: Roehm / Evonik US plants, Lucite International / Mitsubishi Beaumont Texas, Arkema Bayport Texas.

Listing and threshold

Substance Methyl methacrylate (MMA) (CAS 80-62-6), C5H8O2
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 H225 / H315 / H317 / H335
  • OSHA PEL 29 CFR 1910.1000 Table Z-1: 100 ppm 8-hr TWA (per https://www.osha.gov/annotated-pels)
  • NIOSH REL: 100 ppm 8-hr TWA (verify against https://www.cdc.gov/niosh/npg/)
  • NOT subject to TSCA Section 6 Risk Evaluation currently
  • NOT on TSCA Section 5(a)(2) Significant New Use Rule list
  • 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 hazardous materials regulation (49 CFR 172.101): UN 1247, Class 3, PG II
  • IARC: Group 3 (not classifiable as to its carcinogenicity to humans), Monograph Volume 60 (1994) (verify against https://monographs.iarc.who.int/list-of-classifications)

Restrictions and conditions of use

  • OSHA-compliant SDS and workplace HazCom training required (Skin Sens. 1 drives sensitisation surveillance)
  • NO active US AD/CVD case on Chinese-origin MMA currently
  • Section 301 List 3 25% additional duty applies on Chinese-origin MMA (HS 291614)
  • **TRI Form R annual reporting** for facilities above thresholds
  • NFPA 30 Flammable and Combustible Liquids Code applies for storage

Importer obligations

TSCA is a self-certification regime. The dominant practitioner-facing layer is **OSHA PEL 100 ppm plus Skin Sens. 1 sensitisation surveillance plus TRI Form R plus Section 301 List 3 25% additional duty plus NFPA 30 storage compliance**. NO active AD/CVD case. Major US domestic producers: Roehm / Evonik US plants, Lucite International / Mitsubishi Beaumont Texas, Arkema Bayport Texas (verify each company-site pair against the producer's public website).

Required documents

  • TSCA Section 13 Import Certification statement on customs entry
  • OSHA-compliant SDS reflecting H225 / H315 / H317 / H335 classification
  • Customs entry CBP Form 7501 with HS code 291614 (MMA) and Section 301 List 3 25% duty applied
  • TRI Form R annual report (where site exceeds 25,000 lb manufacture / 10,000 lb other-use thresholds)
  • CDR filing every 4 years if site exceeds 25,000 lb/yr threshold
  • NFPA 30-compliant storage tank engineering documentation for bulk receipt

Common compliance traps

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

  • **OSHA PEL 100 ppm 8-hr TWA plus Skin Sens. 1 occupational sensitisation surveillance**
  • **TRI Form R annual reporting**
  • NO active US AD/CVD case on Chinese MMA currently
  • Section 301 List 3 25% additional duty applies; structurally lighter than caprolactam batch 14 plus acetic acid batch 19 lanes
  • Major US producers: Roehm / Evonik plus Lucite International / Mitsubishi Beaumont Texas plus Arkema Bayport Texas
  • TBC / MEHQ inhibitor critical for storage and transport (typical 50 ppm spec)

Where to read next

For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for methyl methacrylate (mma), see the CAS 80-62-6 sourcing reference.

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