US Preliminary Ruling Finds Dumping of Vietnamese PTMEG, Sets 36.55% Rate
On November 10, 2026, the US Department of Commerce issued a preliminary ruling finding that PTMEG imported from Vietnam was being dumped. The companies concerned face a 36.55% rate. Liquidation of covered imports will be suspended, and cash deposits will be required. A final determination is due no later than 135 days after the preliminary ruling is published.
On November 10, 2026, the US Department of Commerce issued a preliminary determination finding that PTMEG (polytetramethylene ether glycol) imported from Vietnam was being dumped. Vietnam’s Trade Remedies Authority, under the Ministry of Industry and Trade, said the department also issued a preliminary determination on the product scope applicable to its anti-dumping investigations of PTMEG from China, South Korea, Taiwan (China) and Vietnam.
The product under investigation is also known as PTHF, PTMG or Polybutylene glycol. It is primarily classified under US tariff code 3907.29.0000 but may also be imported under codes 2932.11.0000 or 3404.90.5150. The case number is A-552-855, the petitioner is BASF Corporation, and the period of investigation runs from October 1, 2025, to March 31, 2026.
The sole producer or exporter designated as a mandatory respondent and other Vietnamese companies are all subject to a countrywide rate of 36.55%. From the date the preliminary determination is published in the US Federal Register, liquidation of covered imports will be suspended, and cash deposits equal to the stated dumping margin will be required. Products exported through third countries are subject to the rate of the Vietnamese producer or exporter that supplied them.
At the mandatory respondent’s request, the US Department of Commerce extended the deadline for its final determination to as much as 135 days after publication of the preliminary determination and extended the provisional measures from four months to a maximum of six months. The department also rejected a request to exclude PTMEG with a molecular weight of 1800 from the investigation, retaining the product scope set out in the notice initiating the case.
Comments on the product scope are due by 5 p.m. US Eastern time on November 12, 2026, and rebuttal comments by the same time on November 17; requests for a hearing must be filed within 30 days of publication of the preliminary determination. The US Department of Commerce expects to verify the information used for its final determination. If that determination continues to find dumping, the US International Trade Commission will then rule on injury to the domestic industry. Vietnam’s Trade Remedies Authority advises affected companies to monitor their cash deposit obligations and prepare consistent reported data and supporting documents.
Source: VietVance
