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U.S. Antidumping and Countervailing Duties
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Preliminary Affirmative Determination in the Antidumping Duty Investigation of Monomers and Oligomers from Taiwan

Preliminary Affirmative Determination in the Antidumping Duty Investigation of Monomers and Oligomers from Taiwan

On September 4, 2025, the U.S. Department of Commerce (Commerce) announced its preliminary affirmative determination in the antidumping duty (AD) investigation of monomers and oligomers from Taiwan 

Preliminary Dumping Rates

Exporter/ProducerWeighted- Average Dumping Rate Margin (percent)
Eternal Materials Co., Ltd286.12*
Qualipoly Chemical Corporation286.12*
Synth-Edge Advanced Material Co., Ltd.286.12*
All Others199.47

* This rate is based on facts available with adverse inferences.

Import Statistics

Taiwan202220232024
Volume (KG)40,137,91232,676,56428,931,989
Value (USD)$204,195,026$97,705,543$79,384,212 

Source: U.S. Census Bureau, accessed through S&P Global Trade Atlas (Harmonized Tariff Schedule of the United States (HTSUS) subheadings 2916.12.5050, 2916.14.2050, 3824.99.2900, 3907.29.0000 and 3907.30.0000). Imports of certain monomers and oligomers enter under HTSUS subheadings that may cover subject and non-subject merchandise.

Next Steps

  • The final determination of this AD investigation is scheduled to be announced on November 18, 2025.
  • Commerce is conducting a concurrent CVD investigation on monomers and oligomers from Taiwan.
  • The U.S. International Trade Commission (ITC) is running a concurrent injury determination investigation.  For more information related to the ITC’s timeline, please refer to the ITC’s calendar.
     

Other Case Information

  • The petitioner is Arkema, Inc. (King of Prussia, PA)
  • For general information and next steps, please refer to a list of preliminary FAQs.

  • Additional case information, including the scope of the investigations, are on file electronically via Enforcement and Compliance’s Antidumping and Countervailing Duty Centralized Electronic Service System (ACCESS). Once you log in, please refer to case number:

    Trading PartnerAD Case Number
    TaiwanA-583-879
  • To date, Commerce maintains 779 AD and countervailing duty orders that provide relief to American companies and industries impacted by unfair trade.