TARIFF TRACKER
Commerce issues antidumping duty order on Korean monomers and oligomers
Commerce issued an antidumping duty order on certain monomers and oligomers from Korea. Cash deposit rates are 65.72 percent or 155.42 percent, with an all others rate of 65.72 percent.
Updated October 12, 2026
STATUS
In effect
·
EFFECTIVE
·
AD/CVD
RATE
65.72% to 155.42%
Estimated weighted-average dumping margins: Green Chemical Co., Ltd.; Green Life Science 65.72 percent, Miwon Specialty Chemical Co., Ltd. 155.42 percent, Kukdo Chemicals Co. Ltd. 155.42 percent, all others 65.72 percent.
COUNTRIES
Republic of Korea
PRODUCT FAMILIES
Chemicals/plastics
HTS CHAPTERS
29, 38, 39
COVERED GOODS
Certain multifunctional acrylate and methacrylate monomers, and acrylated bisphenol-A epoxy based oligomers, including listed CAS numbers, classifiable under HTSUS 2916.12.5050, 2916.14.2050, 3824.99.2900, 3907.29.0000, 3907.30.0000, and possibly 2916.12.1000 and 3824.99.9397.
EXCLUSIONS
Downstream products are excluded, including but not limited to inks, coatings and overprint varnishes. Entries from July 4, 2026 until the day before publication of the ITC final injury determination are to be liquidated without antidumping duties.
WHAT TO DO (OUR GUIDANCE, NOT LEGAL ADVICE)
Check Korean-origin monomers and oligomers against the listed CAS numbers and HTSUS subheadings, and flag affected entries for AD cash deposits. Review entries from January 5, 2026 onward because the notice distinguishes covered assessment periods, refunds for the critical-circumstances period, and liquidation without AD during the provisional-measures gap.
SOURCES
International Trade Administration notice, 91 FR 47214 (July 28, 2026)
QUOTES FROM THE SOURCE
Rate: "The estimated weighted-average dumping margins are as follows:" (source)
Rate: "Green Chemical Co., Ltd.; Green Life Science................ 65.72" (source)
Rate: "Miwon Specialty Chemical Co., Ltd........................... * 155.42" (source)
Rate: "All Others.................................................. 65.72" (source)
Effective date: "DATES: Applicable July 28, 2026." (source)
Signed: "Dated: July 23, 2026." (source)
Countries: "Commerce is issuing an antidumping duty (AD) order on certain monomers and oligomers (monomers and oligomers) from the Republic of Korea (Korea)." (source)
Covered goods: "The products subject to this investigation are certain multifunctional acrylate and methacrylate monomers, and acrylated bisphenol-A epoxy based oligomers" (source)
Covered goods: "This merchandise is currently classifiable under 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." (source)
Exclusions: "Notwithstanding the above, specifically excluded from the scope are downstream products, including but not limited to, inks, coatings and overprint varnishes." (source)
Exclusions: "Commerce intends to instruct CBP to terminate the suspension of liquidation and to liquidate, without regard to antidumping duties, unliquidated entries of monomers and oligomers from Korea entered" (source)
Status: "These instructions suspending liquidation and cash deposit requirements will remain in effect until further notice." (source)
Checked against source
on
AD order A-580-921 on monomers and oligomers from Korea: Green Chemical/Green Life Science 65.72, Miwon and Kukdo 155.42, all others 65.72 percent; applicable July 28, 2026 (dated July 23); HTS 2916, 3824, 3907 (Ch. 29, 38, 39); FR API search by case number on 2026-10-12 shows no later revocation or amendment.
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