US Preliminary Ruling Finds Dumping of Vietnamese PTMEG at 36.55%
On November 10, 2026, the US Department of Commerce issued a preliminary ruling finding that PTMEG imported from Vietnam was being dumped. The sole mandatory respondent and other Vietnamese companies were assigned a dumping margin of 36.55%. Liquidation of covered imports will be suspended after the ruling is published, and importers must post cash deposits at that rate.
Vietnam's Trade Remedies Authority, under the Ministry of Industry and Trade, said the US Department of Commerce issued a preliminary anti-dumping ruling on November 10, 2026, finding that PTMEG from Vietnam was being dumped. The sole producer or exporter selected as a mandatory respondent and other companies subject to the Vietnam-wide rate were all assigned a dumping margin of 36.55%.
The investigation covers PTMEG, or polytetramethylene ether glycol, also known as PTHF, PTMG or polybutylene glycol. Its US tariff classification is 3907.29.0000, though the product may also be imported under 2932.11.0000 and 3404.90.5150. The investigation period runs from October 1, 2025, to March 31, 2026, and the petitioner is BASF Corporation. The US Department of Commerce also issued a preliminary ruling on the product scope applicable to the related investigations involving China, South Korea, Taiwan (China) and Vietnam, and rejected a request to exclude PTMEG with a molecular weight of 1800 from the investigation.
From the publication of the preliminary ruling in the US Federal Register, liquidation of covered imports will be suspended, and importers must post cash deposits at the 36.55% rate. Third-country exporters will be subject to the rate assigned to the Vietnamese producer or exporter that supplied their goods. At the mandatory respondent's request, the US Department of Commerce extended the deadline for its final determination to no more than 135 days after publication of the preliminary ruling and extended the provisional measures from four months to a maximum of six months.
Comments on the product scope are due by 5 p.m. US Eastern Time on November 12, 2026, and rebuttal comments by 5 p.m. on November 17. Requests for a hearing must be submitted within 30 days of publication of the preliminary ruling. The US Department of Commerce expects to verify the information used for its final determination. If the final determination also finds dumping, the US International Trade Commission will issue a determination on injury to the domestic industry. Vietnam's Trade Remedies Authority advised companies involved to submit comments on time, prepare documents for verification, and account for the cash deposit requirement in their contracts, pricing and delivery plans.
Source: VietVance
