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U.S. Antidumping & Countervailing Duties
Information and Resources for U.S. Trade Remedy Laws and Ongoing Proceedings

Final Determination in the AD Investigation of Monomers and Oligomers from the Republic of Korea

Final Affirmative Determination in the Antidumping Duty Investigation of Monomers and Oligomers from the Republic of Korea

On May 21, 2026, the U.S. Department of Commerce (Commerce) announced its final affirmative determination in the antidumping duty (AD) investigation of monomers and oligomers from the Republic of Korea (Korea).    

Final Dumping Rates 

Korea

Exporter/ProducerWeighted-Average Dumping Margin (percent)
Green Chemical Co., Ltd.; Green Life Science65.72
Miwon Specialty Chemical Co., Ltd.155.42*
Kukdo Chemicals Co. Ltd.155.42*
All Others65.72

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

Next Steps 

  • The International Trade Commission (ITC) is running a concurrent injury determination investigation. For more information related to the International Trade Commission’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 FAQs for the final determination.
  • Additional case information, including the scope of the investigation, is on file electronically via Enforcement and Compliance’s Antidumping and Countervailing Duty Centralized Electronic Service System (ACCESS). Once you log in, please refer to the following case number A-580-921.
  • To date, Commerce maintains 834 AD and CVD orders that provide relief to American companies and industries impacted by unfair trade.

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