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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 the Republic of Korea

Preliminary Affirmative Determinations in the Antidumping Duty Investigation of Monomers and Oligomers from the Republic of Korea

On December 31, 2025, the U.S. Department of Commerce (Commerce) announced its preliminary affirmative determination in the antidumping duty (AD) investigation of certain monomers and oligomers from the Republic of Korea (Korea)

Preliminary Dumping Rates

Korea

Producer/ExporterWeighted-Average Dumping Margin (Percent)
Green Chemical Co.,/Green Life Science65.72
Miwon Specialty Chemical Co., Ltd10.94
Kudo Chemicals Co. Ltd188.01*
All Others15.59

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


Import Statistics 

Korea202220232024
Volume (KG)161,833,928120,373,201149,626,552
Value (USD)$809,028,610$369,007,881$414,277,762

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 in this AD investigation is currently scheduled to be announced on May 21, 2026.
  • Commerce is also conducting concurrent AD and countervailing duty (CVD) investigations of monomers and oligomers from Taiwan
  • The U.S. International Trade Commission (ITC) is running concurrent injury determination investigations. 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, 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 case number A-580-921.
  • For more information on subsidy programs, please refer to the subsidies enforcement library.
  • To date, Commerce maintains 797 AD and CVD orders that provide relief to American companies and industries impacted by unfair trade.

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Global Business Navigator Chatbot Beta

Welcome to the Global Business Navigator, an artificial intelligence (AI) Chatbot from the International Trade Administration (ITA). This tool, currently in beta version testing, is designed to provide general information on the exporting process and the resources available to assist new and experienced U.S. exporters. The Chatbot, developed using Microsoft’s Azure AI services, is trained on ITA’s export-related content and aims to quickly get users the information they need. The Chatbot is intended to make the benefits of exporting more accessible by understanding non-expert language, idiomatic expressions, and foreign languages.

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As a beta product, the Chatbot is currently being tested and its responses may occasionally produce inaccurate or incomplete information. The Chatbot is trained to decline out of scope or inappropriate requests. The Chatbot’s knowledge is limited to the public information on the Export Solutions web pages of Trade.gov, which covers a wide range of topics on exporting. While it cannot provide responses specific to a company’s product or a specific foreign market, its reference pages will guide you to other relevant government resources and market research. Always double-check the Chatbot’s responses using the provided references or by visiting the Export Solutions web pages on Trade.gov. Do not use its responses as legal or professional advice. Inaccurate advice from the Chatbot would not be a defense to violating any export rules or regulations.

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