US initiates anti-dumping probe on polyether glycol from China, Korea, Taiwan, Vietnam
The US Department of Commerce has initiated less-than-fair-value (LTFV) investigations into polytetramethylene ether glycol (PTMEG) imported from China, Korea, Taiwan, and Vietnam, effective May 5, 2026. The investigation will determine whether these countries are dumping the product into the US market at prices below fair value. If dumping is confirmed, anti-dumping duties may be imposed on future imports from these countries. Shippers exporting or importing PTMEG from these four nations should prepare for potential tariff changes and duty deposits on affected shipments.
Photo: Shuaizhi Tian / PexelsUS launches anti-dumping investigation into polyether glycol imports
The US Department of Commerce announced on May 5, 2026, the initiation of less-than-fair-value investigations into polytetramethylene ether glycol (PTMEG) from the People's Republic of China, the Republic of Korea, Taiwan, and the Socialist Republic of Vietnam, as published in the Federal Register.
Who is affected
This investigation targets a specific chemical compound used in manufacturing high-performance polyurethane elastomers, specialty coatings, and other industrial applications. Importers sourcing PTMEG from China, Korea, Taiwan, or Vietnam will be directly impacted by potential anti-dumping duty assessments. Exporters based in these four countries face investigation into their US export pricing practices.
The investigation will examine whether producers and exporters in these four nations are selling PTMEG to the United States at less than fair value—meaning below the price charged in their home markets or at less than their cost of production. If dumping is substantiated, the US International Trade Commission (ITC) will conduct a separate injury determination. A finding of both dumping and material injury could result in anti-dumping duties being imposed retroactively and prospectively on affected imports.
Investigation timeline and next steps
The Commerce Department will conduct a preliminary determination typically within 140 days of the investigation initiation date. During this period, importers should expect:
- Questionnaires sent to foreign producers and US importers
- Requests for detailed pricing, cost, and sales data
- Potential cash-deposit requirements on future imports pending final determination
- Public hearings where interested parties can present evidence
Once a preliminary dumping determination is made, the ITC will begin its injury investigation in parallel. The final determination typically follows within 75 days of the preliminary finding.
What this means for shippers
Importers of PTMEG from China, Korea, Taiwan, or Vietnam must register with Commerce as importers of record immediately and monitor the investigation docket. From the preliminary determination onward, assume cash deposits on all PTMEG entries from these countries—likely 15–50% of transaction value pending final duties. Cease all speculative purchasing now; negotiate contracts with force-majeure clauses covering anti-dumping duties. Flag HS code 2930.90.00 and 3907.90 (depending on product classification) in your customs invoices and landed-cost models. Exporters must prepare detailed cost-of-production and home-market-pricing documentation for Commerce questionnaires—failure to respond leads to adverse facts-available rates (often 100%+). /us-china-tariff-lookup
