CAS 75-09-2 · TSCA · United States of America

Dichloromethane (methylene chloride, DCM) under TSCA

CH2Cl2 · 二氯甲烷

Status: Restricted. DCM is on the TSCA Inventory and currently listed as TSCA Active. **EPA TSCA Section 6(a) Final Risk Management Rule for methylene chloride published 8 May 2024 in the Federal Register (document 2024-09606)** and codified at 40 CFR Part 751 Subpart B banning most consumer plus commercial paint-stripper uses plus imposing workplace exposure controls (verify the consolidated rule text and effective dates against https://www.epa.gov/assessing-and-managing-chemicals-under-tsca/risk-management-methylene-chloride and the Federal Register publication before relying). Earlier 2019 EPA TSCA rule banned DCM in consumer paint strippers; the 2024 rule extends bans to most professional / commercial paint-stripper uses plus imposes Workplace Chemical Protection Program (WCPP) requirements. **Active OSHA Methylene Chloride Standard 29 CFR 1910.1052** (specific carcinogen standard with PEL 25 ppm 8-hr TWA, STEL 125 ppm, Action Level 12.5 ppm; verify against https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1052). **California Proposition 65 listed as carcinogen since 1 April 1988** (verify exact listing date against OEHHA https://oehha.ca.gov/proposition-65/proposition-65-list before invoicing California-distributed product). **TRI Section 313 listed**. NO active US AD/CVD case on Chinese-origin DCM currently (verify against https://access.trade.gov/ before invoicing). Section 301 List 3 25% additional duty applies on Chinese-origin DCM (HS 290312). Major US domestic producers: Olin Corporation (Freeport Texas), Occidental Chemical / OxyChem (Geismar Louisiana), Westlake Chemical (verify each company-site pair against the producer's public website before relying).

The US DCM lane is dominated by **TSCA Section 6 Final Risk Management Rule (April 2024) banning most consumer plus commercial paint-stripper uses plus imposing WCPP for industrial uses + OSHA Methylene Chloride-specific 29 CFR 1910.1052 PEL + Cal Prop 65 carcinogen 1 April 1988 + TRI Form R + IARC Group 2A (since 2017 Monograph 110) workplace surveillance**. NO active US AD/CVD case. Major US producers: Olin Corporation, Occidental Chemical / OxyChem, Westlake Chemical. **DCM US regulatory state is among the most-restricted in the dataset post-April-2024 TSCA Section 6 rule** (alongside ethylene oxide batch 28 plus formaldehyde batch 18).

Listing and threshold

Substance Dichloromethane (methylene chloride, DCM) (CAS 75-09-2), CH2Cl2
Regime US Toxic Substances Control Act (TSCA), administered by EPA
Jurisdiction United States of America
Status Restricted
Tonnage threshold CDR threshold: 25,000 lb manufactured or imported per site per year

Classifications under this regime

  • OSHA HCS: GHS H315 / H319 / H335 / H351
  • **OSHA Methylene Chloride Standard 29 CFR 1910.1052** (specific carcinogen standard): PEL 25 ppm 8-hr TWA, STEL 125 ppm (15-min), Action Level 12.5 ppm (per https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1052)
  • NIOSH REL: lowest feasible exposure (occupational carcinogen)
  • **Active TSCA Section 6 Final Risk Management Rule (40 CFR Part 751) finalised April 2024** banning most consumer plus commercial paint-stripper uses plus imposing Workplace Chemical Protection Program (WCPP)
  • NOT on EPA RMP threshold list
  • NOT on DEA List I or List II
  • **California Proposition 65 listed as carcinogen since 1 April 1988** (verify exact listing date against OEHHA https://oehha.ca.gov/proposition-65/proposition-65-list)
  • **TRI Section 313 listed**: Form R annual reporting required for facilities above thresholds
  • DOT 49 CFR 172.101: UN 1593, Class 6.1, PG III
  • **IARC: Group 2A (probably carcinogenic to humans) since 2017 IARC Monograph 110 (verify against https://monographs.iarc.who.int/ before relying)**

Restrictions and conditions of use

  • **Active TSCA Section 6 Final Risk Management Rule (40 CFR Part 751) finalised April 2024** bans most consumer plus commercial paint-stripper uses plus imposes WCPP (Workplace Chemical Protection Program) for industrial uses
  • **OSHA Methylene Chloride-specific 29 CFR 1910.1052 PEL compliance** is dominant workplace overhead (regulated areas, exposure monitoring, medical surveillance, training, recordkeeping)
  • **Cal Prop 65 listing requires "WARNING"**
  • NO active US AD/CVD case on Chinese-origin DCM currently
  • Section 301 List 3 25% additional duty applies on Chinese-origin DCM (HS 290312)
  • **TRI Form R annual reporting**

Importer obligations

TSCA self-certification regime. **TSCA Section 6 Final Risk Management Rule (April 2024)** is the dominant US compliance shift; downstream paint-stripper sales prohibited for most consumer plus commercial uses; industrial uses subject to WCPP. **OSHA Methylene Chloride-specific 29 CFR 1910.1052 PEL** drives substantial workplace exposure-control overhead (regulated areas, exposure monitoring, medical surveillance, 30-year recordkeeping). NO active AD/CVD case. Major US domestic producers: Olin Corporation Freeport Texas, Occidental Chemical / OxyChem Geismar Louisiana, Westlake Chemical.

Required documents

  • TSCA Section 13 Import Certification on customs entry
  • OSHA SDS reflecting H315 / H319 / H335 / H351
  • **TSCA Section 6 Final Risk Management Rule compliance documentation** for paint-stripper distribution chain plus WCPP for industrial uses
  • **OSHA Methylene Chloride Standard 29 CFR 1910.1052 workplace compliance documentation** (regulated areas, exposure monitoring, medical surveillance, 30-year recordkeeping)
  • CBP Form 7501 with HS 290312 + Section 301 List 3 25% duty
  • Cal Prop 65 "WARNING" label compliance
  • TRI Form R annual report
  • CDR filing every 4 years

Common compliance traps

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

  • **TSCA Section 6 Final Risk Management Rule (April 2024)** is the dominant practitioner watch-item: most consumer + commercial paint-stripper uses banned, industrial uses subject to WCPP
  • **OSHA Methylene Chloride-specific 29 CFR 1910.1052 PEL** workplace exposure-control overhead (regulated areas, exposure monitoring, medical surveillance, 30-year recordkeeping)
  • **Cal Prop 65 carcinogen since 1 April 1988** drives consumer-product "WARNING" labelling
  • **IARC Group 2A since 2017 Monograph 110**
  • **TRI Form R annual reporting**
  • NO active US AD/CVD case on Chinese DCM currently
  • Section 301 List 3 25% additional duty applies
  • Major US producers: Olin Corporation Freeport Texas, Occidental Chemical / OxyChem Geismar Louisiana, Westlake Chemical

Where to read next

For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for dichloromethane (methylene chloride, dcm), see the CAS 75-09-2 sourcing reference.

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

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

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Cross-jurisdiction profile and sourcing references

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