1. On 05/05/2026, Commerce published in the Federal Register its initiation of the antidumping duty investigation of polytetramethylene ether glycol from the People's Republic of China (91 FR 24162). The effective date of this initiation is 04/28/2026 (the applicable date stated in the FR notice). On 05/14/2026, Commerce published a correction to the scope of the investigation (91 FR 27266). The corrected scope language is below. 2. The merchandise covered by the investigation is polytetramethylene ether glycol (PTMEG), which is a polymer consisting of linear diols (i.e., organic chemical compound that has two hydroxyl (-OH) functional groups) with a molecular backbone of repeating tetramethylene units (-CH₂CH₂CH₂CH₂-) interconnected through ether bonds (i.e., a single oxygen atom bonded to two carbon atoms), with a chemical formula HO{(CH₂)₄}ₙOH. PTMEG is also referred to as Polytetrahydrofuran, PTHF, Polytetramethylene ether glycol, PTMG, and Polybutylene glycol. PTMEG is typically blended with butylated hydroxytoluene (BHT) or another stabilizer such as higher molecular weight hindered phenols or phosphoric acid. In addition to a stabilizer, PTMEG is sometimes blended with a modifier or additive, such as phosphoric acid or sulfuric acid. The scope includes all blends consisting of PTMEG and stabilizers, modifiers, and/or additives, where the stabilizers, modifiers, and/or additives collectively account for no more than two percent of the total weight of the PTMEG blend. PTMEG is normally associated with Chemical Abstracts Service (CAS) registry number 25190-06-1. The scope includes all forms of PTMEG, regardless of physical form, purity, molecular weight, number of hydroxyls, number of acids, color, density, softening point, glass transition point, flash point, water content, viscosity, and packaging. PTMEG that has been blended with other products is included within this scope when such blends include constituent parts that have been intermingled but that have not been chemically reacted with each other to produce a different product. For such blends, only the PTMEG component of the mixture, inclusive of any stabilizers, modifiers, and/or additives collectively accounting for no more than two percent of the combined weight of the PTMEG component and the stabilizers, modifiers, and/or additives, is covered by the scope of the investigation. The scope includes merchandise matching the above description that has been processed in a third country, including by commingling, diluting, introducing, or removing stabilizers, modifiers, or additives, or performing any other processing that would not otherwise remove the merchandise from the scope of the investigation if performed in the subject country. The scope also includes PTMEG that is commingled or blended with PTMEG from sources not subject to the investigation. Only the subject component of such commingled products is covered by the scope of the investigation. The subject merchandise is classifiable in the Harmonized Tariff Schedule of the United States (HTSUS) under subheading 3907.29.0000. Subject merchandise may also be imported under HTSUS subheadings 2932.11.0000 and 3404.90.5150. Although the HTSUS subheading and CAS registry number are provided for convenience and customs purposes, the written description of the scope is dispositive. 3. This proceeding has been assigned case number A-570-227. 4. If there are any questions by the importing public regarding this message, please contact the Call Center for the Office of AD/CVD Operations, Enforcement and Compliance, International Trade Administration, U.S. Department of Commerce at (202) 482-0984. CBP ports should submit their inquiries through authorized CBP channels only. (This message was generated by OIII: DS.) 5. There are no restrictions on the release of this information. Alexander Amdur