Commerce Initiates Antidumping and Countervailing Duty Investigations of Certain Monomers and Oligomers from South Korea and Taiwan

Commerce Initiates Antidumping and Countervailing Duty Investigations of Certain Monomers and Oligomers from South Korea and Taiwan

On April 17, 2025, the U.S. Department of Commerce (Commerce) announced the initiation of antidumping duty (AD) investigations of certain monomers and oligomers from the Republic of Korea (Korea) and Taiwan and a countervailing duty (CVD) investigation of certain monomers and oligomers from Taiwan.

Alleged Dumping Margins

Alleged Subsidy Rates 

* de minimis = less than 1% for developed countries, less than 2% for developing countries

Case Calendar

NOTE: Commerce’s preliminary and final determination deadlines are governed by statute. For CVD investigations, the deadlines are set forth in sections 703(b) and 705(a)(1) of the Tariff Act of 1930, as amended (the Act). For AD investigations, the deadlines are set forth in sections 733(b) and 735(a) of the Act. These deadlines may be extended under certain circumstances.
* If the International Trade Commission (ITC) makes a negative preliminary determination of injury, then the corresponding AD/CVD investigation(s) will be terminated.
** Where the deadline falls on a weekend/holiday, the appropriate date is the next business day.
*** This will take place only in the event of a final affirmative determination from Commerce.
**** This will take place only in the event of final affirmative determinations from Commerce and the ITC.

Import Statistics

 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.

Other Case Information

• The petitioner is Arkema, Inc. (King of Prussia, PA)
• For general information and next steps, please refer to a list of initiation FAQs.
• Additional case information, including the scope of the investigations and alleged subsidy programs, 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 the following case number:

• For more information on subsidy programs, please refer to the subsidies enforcement library.
• To date, Commerce maintains 734 AD and CVD orders that provide relief to American companies and industries impacted by unfair trade.