CAS 75-01-4 · TSCA · United States of America

Vinyl chloride monomer (VCM, chloroethene) under TSCA

C2H3Cl · 氯乙烯

Status: Restricted. VCM is on the TSCA Inventory and currently listed as TSCA Active. **Active OSHA Vinyl Chloride Standard 29 CFR 1910.1017** (specific carcinogen standard with PEL 1 ppm 8-hr TWA, STEL 5 ppm, Action Level 0.5 ppm; verify against https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1017). **California Proposition 65 listed as carcinogen since 27 February 1987** (verified against OEHHA https://oehha.ca.gov/proposition-65/proposition-65-list 2026-05-12 audit). **TRI Section 313 listed**. **EPA RMP threshold 10,000 lb** (regulated toxic substance + flammable substance; verify against 40 CFR 68 Appendix A at https://www.ecfr.gov/current/title-40/part-68 before relying on a specific threshold). NOT on DEA scheduling. NO active US AD/CVD case on Chinese-origin VCM currently (verify against https://access.trade.gov/ before invoicing). Section 301 List 3 25% additional duty applies on Chinese-origin VCM (HS 290321). **EPA TSCA Section 6 risk evaluation: VCM was prioritised as high-priority substance in December 2023; risk evaluation work in progress** (verify current TSCA risk-evaluation status against https://www.epa.gov/assessing-and-managing-chemicals-under-tsca before relying). Major US domestic producers: Westlake Chemical (Lake Charles Louisiana plus Calvert City Kentucky), Shintech / Shin-Etsu (Plaquemine Louisiana plus Freeport Texas), Formosa Plastics (Point Comfort Texas), Olin Corporation, Occidental Chemical / OxyChem (verify each company-site pair against the producer's public website before relying).

The US VCM lane is dominated by **OSHA Vinyl Chloride-specific 29 CFR 1910.1017 PEL + EPA RMP 10,000 lb threshold + EPA TSCA Section 6 high-priority designation December 2023 + Cal Prop 65 carcinogen 27 February 1987 + TRI Form R + IARC Group 1 (verify initial Monograph volume against https://monographs.iarc.who.int/list-of-classifications; prior reports cited Vol 19 1979 but Vol 7 1974 and Vol 100F 2012 reaffirmation also referenced)**. NO active US AD/CVD case. Section 301 List 3 25% additional duty applies. Major US producers: Westlake Chemical, Shintech / Shin-Etsu, Formosa Plastics, Olin Corporation, Occidental Chemical / OxyChem. **VCM is structurally NOT internationally traded as bulk**.

Listing and threshold

Substance Vinyl chloride monomer (VCM, chloroethene) (CAS 75-01-4), C2H3Cl
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 H220 / H340 / H350 / H373
  • **OSHA Vinyl Chloride Standard 29 CFR 1910.1017** (specific carcinogen standard): PEL 1 ppm 8-hr TWA, STEL 5 ppm, Action Level 0.5 ppm (per https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1017)
  • NIOSH REL: lowest feasible exposure (occupational carcinogen)
  • **EPA RMP threshold 10,000 lb** (regulated toxic substance + flammable substance; verify against 40 CFR 68 App A)
  • **EPA TSCA Section 6 high-priority designation December 2023**; risk evaluation work in progress
  • NOT on TSCA Section 5(a)(2) Significant New Use Rule list
  • NOT on DEA List I or List II
  • **California Proposition 65 listed as carcinogen since 27 February 1987** (verified against OEHHA https://oehha.ca.gov/proposition-65/proposition-65-list 2026-05-12 audit)
  • **TRI Section 313 listed**: Form R annual reporting required
  • DOT 49 CFR 172.101: UN 1086, Class 2.1 flammable gas
  • **IARC: Group 1 (carcinogenic to humans); initial designation Monograph Volume 7 (1974) per multiple secondary sources, prior dataset draft cited Volume 19 (1979); reaffirmed Volume 97 (2008) and Volume 100F (2012)** (verify against https://monographs.iarc.who.int/list-of-classifications)

Restrictions and conditions of use

  • **OSHA Vinyl Chloride-specific 29 CFR 1910.1017 PEL compliance** is dominant workplace overhead (regulated areas, exposure monitoring, medical surveillance, training, recordkeeping)
  • **Cal Prop 65 listing requires "WARNING"** on consumer products containing VCM monomer residue above No-Significant-Risk-Level
  • **EPA RMP threshold 10,000 lb**: Risk Management Plan filing required for above-threshold facilities
  • **EPA TSCA Section 6 high-priority designation December 2023**; risk evaluation work-pending
  • NO active US AD/CVD case on Chinese-origin VCM currently
  • Section 301 List 3 25% additional duty applies on Chinese-origin VCM (HS 290321)
  • **TRI Form R annual reporting**

Importer obligations

TSCA self-certification regime. **OSHA Vinyl Chloride-specific 29 CFR 1910.1017 PEL plus EPA RMP 10,000 lb threshold plus EPA TSCA Section 6 high-priority designation plus Cal Prop 65 plus TRI Form R** define the compliance stack. **VCM is structurally NOT internationally traded as bulk**; intra-complex captive consumption dominates. Major US domestic producers: Westlake Chemical, Shintech / Shin-Etsu, Formosa Plastics, Olin Corporation, Occidental Chemical / OxyChem.

Required documents

  • TSCA Section 13 Import Certification on customs entry
  • OSHA SDS reflecting H220 / H340 / H350 / H373
  • **OSHA Vinyl Chloride Standard 29 CFR 1910.1017 workplace compliance documentation** (regulated areas, exposure monitoring, medical surveillance, 30-year recordkeeping)
  • CBP Form 7501 with HS 290321 + Section 301 List 3 25% duty
  • **EPA RMP filing** (where site exceeds 10,000 lb threshold)
  • Cal Prop 65 "WARNING" label compliance for downstream PVC articles
  • 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.

  • **OSHA Vinyl Chloride-specific 29 CFR 1910.1017 PEL** workplace exposure-control overhead (regulated areas, exposure monitoring, medical surveillance, 30-year recordkeeping)
  • **EPA RMP threshold 10,000 lb**: Risk Management Plan filing required
  • **EPA TSCA Section 6 high-priority designation December 2023**; risk-management rule expected 2025-2027
  • **Cal Prop 65 carcinogen since 27 February 1987** (verified against OEHHA https://oehha.ca.gov/proposition-65/proposition-65-list 2026-05-12 audit)
  • **IARC Group 1; initial Volume 7 (1974) per secondary sources, prior draft cited Volume 19 (1979); reaffirmed Volume 97 (2008) and Volume 100F (2012); verify against https://monographs.iarc.who.int/list-of-classifications**
  • **TRI Form R annual reporting**
  • NO active US AD/CVD case on Chinese VCM currently
  • Section 301 List 3 25% additional duty applies; bulk-trade structurally limited
  • Major US producers: Westlake Chemical, Shintech / Shin-Etsu, Formosa Plastics, Olin Corporation, Occidental Chemical / OxyChem
  • **VCM is structurally NOT internationally traded as bulk**

Where to read next

For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for vinyl chloride monomer (vcm, chloroethene), see the CAS 75-01-4 sourcing reference.

For grade-by-grade buying notes, freight maths, supplier-tier pricing, and a worked landed-cost example, the vinyl chloride monomer (vcm, chloroethene) 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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