CAS 108-05-4 · TSCA · United States of America

Vinyl acetate monomer (VAM) under TSCA

C4H6O2 · 醋酸乙烯酯

Status: Listed. Vinyl acetate monomer is on the TSCA Inventory and is currently listed as TSCA Active. **Active TSCA Section 6 Risk Evaluation prioritisation 2024**: VAM was designated high-priority for risk evaluation by EPA in December 2024 (verify the prioritisation date and current risk-evaluation status against https://www.epa.gov/assessing-and-managing-chemicals-under-tsca before relying); risk evaluation work to begin 2025-2026; long-term watch-item. OSHA does not have a substance-specific PEL for vinyl acetate at 29 CFR 1910.1000 Table Z-1; NIOSH REL is 4 ppm 8-hr TWA + 15 ppm 15-minute STEL (verify against NIOSH Pocket Guide https://www.cdc.gov/niosh/npg/npgd0656.html); ACGIH TLV-TWA is 10 ppm (non-binding industry guidance). **California Proposition 65 listed as carcinogen since 4 December 2009** (verify exact listing date against OEHHA https://oehha.ca.gov/proposition-65/proposition-65-list before invoicing California-distributed product). **TRI Section 313 listed**: Form R annual reporting required. NOT on EPA RMP threshold list. NOT on DEA scheduling. NO active US AD/CVD case on Chinese-origin VAM currently (verify against https://access.trade.gov/ before invoicing). Section 301 List 3 25% additional duty applies on Chinese-origin VAM (HS 291532). Major US domestic producers (verify each company-site pair against the producer's public website before relying): Celanese Pampa Texas plus Bay City Texas, LyondellBasell La Porte Texas, Kuraray America Pasadena Texas (acetylene-route legacy plant, wound down).

The US VAM lane is dominated by **Cal Prop 65 "WARNING" labelling (since 2009) + TRI Form R annual reporting + Section 301 List 3 25% additional duty**. **Active TSCA Section 6 Risk Evaluation prioritisation December 2024** is long-term watch-item. NO active US AD/CVD case. Major US producers: Celanese Pampa Texas (world's largest single-site VAM plant ~700 kt/yr) + Bay City Texas, LyondellBasell La Porte Texas. US is comparatively self-sufficient. **VAM distinguishing pattern in US lane**: Cal Prop 65 plus TRI plus active TSCA Section 6 prioritisation 2024 plus closes acetic acid batch 19 chain at the largest single end-use of acetic acid globally (verify acetic acid end-use percentages against ICIS or S&P Commodity Insights).

Listing and threshold

Substance Vinyl acetate monomer (VAM) (CAS 108-05-4), C4H6O2
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 / H319 / H335 / H351
  • OSHA PEL: not specifically established
  • NIOSH REL: 10 ppm 8-hr TWA, 15 ppm STEL
  • **Active TSCA Section 6 Risk Evaluation prioritisation December 2024**; risk evaluation work-pending; long-term watch-item
  • 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
  • **California Proposition 65 listed as carcinogen since 4 December 2009** (verify exact listing date against OEHHA https://oehha.ca.gov/proposition-65/proposition-65-list)
  • **TRI Section 313 listed**: Form R annual reporting required
  • DOT hazardous materials regulation (49 CFR 172.101): UN 1301, Class 3, PG II
  • **IARC: Group 2B (possibly carcinogenic to humans) since 1995**

Restrictions and conditions of use

  • **Active TSCA Section 6 Risk Evaluation prioritisation December 2024**; long-term watch-item
  • OSHA-compliant SDS and workplace HazCom training required
  • **Cal Prop 65 listing requires "WARNING"** on consumer products containing VAM above No-Significant-Risk-Level
  • NO active US AD/CVD case on Chinese-origin VAM currently
  • Section 301 List 3 25% additional duty applies on Chinese-origin VAM (HS 291532)
  • NFPA 30 Flammable and Combustible Liquids Code applies for storage
  • **TRI Form R annual reporting**

Importer obligations

TSCA is a self-certification regime. The dominant practitioner-facing layer for VAM is **TSCA Section 6 Risk Evaluation prioritisation tracking + Cal Prop 65 "WARNING" labelling + TRI Form R annual reporting**. NO active AD/CVD case. Section 301 List 3 25% additional duty applies. Major US domestic producers: Celanese Pampa Texas (world's largest single-site VAM plant) + Bay City Texas, LyondellBasell La Porte Texas. US is comparatively self-sufficient for VAM through domestic supply integrated with acetic acid + ethylene chain.

Required documents

  • TSCA Section 13 Import Certification statement on customs entry
  • OSHA-compliant SDS reflecting H225 / H315 / H319 / H335 / H351 classification
  • Customs entry CBP Form 7501 with HS code 291532 (VAM) and Section 301 List 3 25% duty applied
  • Cal Prop 65 "WARNING" label compliance documentation
  • TRI Form R annual report
  • CDR filing every 4 years if site exceeds 25,000 lb/yr threshold

Common compliance traps

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

  • **Active TSCA Section 6 Risk Evaluation prioritisation December 2024** is the long-term watch-item; track EPA TSCA-IRIS docket
  • **Cal Prop 65 listing applies to all finished-product distribution to California**
  • **TRI Form R annual reporting**
  • NO active US AD/CVD case on Chinese VAM currently
  • Section 301 List 3 25% additional duty applies; structurally lighter than caprolactam batch 14 + acetic acid batch 19 lanes
  • Major US domestic producers: Celanese Pampa Texas plus Bay City Texas, LyondellBasell La Porte Texas (verify the Pampa single-site VAM rank and kt/yr nameplate against the Celanese corporate site before quoting)
  • US is comparatively self-sufficient for VAM through domestic supply integrated with acetic acid (batch 19) + ethylene chain

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 acetate monomer (vam), see the CAS 108-05-4 sourcing reference.

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