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Certain Monomers and Oligomers — A-580-921

US AD/CVD order record · dataset entry, not legal advice.

Antidumping (AD) Active order
Program
Antidumping (AD)
Status
Active order
Countries
Korea
Effective
2026-07-28
Latest event
2026-07-28
FR notice
Read the Federal Register notice →

Source: Federal Register · data retrieved 2026-10-16T13:52:05Z

Scope of the measure

The products covered by this order are monomers and oligomers from Korea. For a complete description of the scope of this order, see the appendix to this notice. Antidumping Duty Order On July 13, 2026, in accordance with 735(d) of the Act, the ITC notified Commerce of its final determination that an industry in the United States is materially injured within the meaning of section 735(b)(1)(A)(i) of the Act by reason of imports of monomers and oligomers from Korea that are sold in the United States at LTFV. Therefore, in accordance with sections 735(c)(2) and 736 of the Act, Commerce is issuing this AD order. Because the ITC determined that imports of monomers and oligomers are materially injuring a U.S. industry, unliquidated entries of such merchandise from Korea, entered or withdrawn from warehouse for consumption, on or after January 5, 2026, are subject to the assessment of antidumping duties. Id. Therefore, in accordance with section 736(a)(1) of the Act, Commerce will direct U.S. Customs and Border Protection (CBP) to assess, upon further instruction by Commerce, antidumping duties equal to the amount by which the normal value of the merchandise exceeds the export price (or constructed export price) of the merchandise, for all relevant entries of monomers and oligomers from Korea. Antidumping duties will be assessed on unliquidated entries of monomers and oligomers entered, or withdrawn from warehouse, for consumption on or after January 5, 2026, the date of the publication of the Preliminary Determination but will not include entries occurring after the expiration of the provisional measures period and before the publication of the ITC's final injury determination under section 735(b) of the Act, as further described in the ``Provisional Measures-- AD'' section of this notice. See Certain Monomers and Oligomers from the Republic of Korea: Preliminary Affirmative Determination of Sales at Less Than Fair Value, Preliminary Affirmative Determination of Critical Circumstances, in Part, and Postponement of Final Determination, and Extension of Provisional Measures, 91 FR 244 (January 5, 2026) (Preliminary Determination). Critical Circumstances--AD In addition, the ITC found that critical circumstances do not exist with respect to imports of monomers and oligomers from Korea. As a result, we intend to instruct CBP to lift the suspension of liquidation and to refund all cash deposits for estimated antidumping duties with respect to entries of subject merchandise entered, or withdrawn from warehouse, for consumption on or after October 7, 2025, (i.e., 90 days prior to the date of publication of the affirmative Preliminary Determination), but before January 5, 2026 (i.e., the date of publication of the Preliminary Determination). Suspension of Liquidation and Cash Deposits In accordance with section 736 of the Act, Commerce intends to instruct CBP to reinstitute the suspension of liquidation of monomers and oligomers from Korea, effective on the date of publication of the ITC's final affirmative injury determination in the Federal Register. Commerce also intends to instruct CBP to require cash deposits equal to the estimated weighted-average dumping margins listed in the Final Determination. The all-others rate applies to all producers or exporters not specifically listed. These instructions suspending liquidation and cash deposit requirements will remain in effect until further notice. Estimated Weighted-Average Dumping Margins The estimated weighted-average dumping margins are as follows: Weighted- average Exporter/producer dumping margin (percent) Green Chemical Co., Ltd.; Green Life Science 65.72 Miwon Specialty Chemical Co., Ltd * 155.42 Kukdo Chemicals Co. Ltd * 155.42 All Others 65.72 * Rate based on facts available with adverse inferences. Provisional Measures Section 733(d) of the Act states that instructions issued under section 733(d)(1) and (2) of the Act pursuant to an affirmative preliminary determination may not remain in effect for more than four months, except where exporters representing a significant proportion of exports of the subject merchandise request that Commerce extends the four-month period to no more than six months. At the request of exporters that account for a significant proportion of exports of monomers and oligomers from Korea, Commerce extended the four-month period to six months in this investigation. Commerce published the Preliminary Determination on January 5, 2026. See Preliminary Determination. The extended provisional measures period, beginning on the date of publication of the Preliminary Determination, ended on July 3, 2026. Therefore, in accordance with section 733(d) of the Act, 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, or withdrawn from warehouse, for consumption on or after July 4, 2026, the first day provisional measures were no longer in effect, until and through the day preceding the date of publication of the ITC's final injury determination in the Federal Register. Suspension of liquidation and the collection of cash deposits will resume on the date of publication of the ITC's final injury determination in the Federal Register.

Scope text quoted verbatim from the Federal Register notice. Scope text retrieved: 2026-10-19T16:17:45Z. Record last fetched: 2026-10-16T13:52:05Z. Verify against the official notice before relying on it.

HTS codes covered by this order

HTSUS (dotted)8-digitDescription (USITC reference)
2916.12.1029161210Aromatic
2916.12.5029161250Other
2916.14.1029161410Dicyclopentenyloxyethyl methacrylate
2916.14.2029161420Other
3824.99.1138249911In the form of ingots
3824.99.1938249919Other
3824.99.2138249921Consisting wholly of substances found naturally in coal tar, whether obtained from coal tar or other source
3824.99.2538249925Aqueous mixtures of triphenyl sulfonium chloride, diphenyl (4-phenylthio)phenyl sulfonium chloride and (thiodi-4,1- phenylene)bis(diphenyl sulfonium) dichloride
3824.99.2638249926Benzene, 2,4-diisocyanate-1,3,5-tris(1- methylethyl) homopolymer; 5-Fluoro-2-methyl-1-[[4-(methylsulfinyl)- phenyl]methylene]-1H-indene;Mixtures of dimethyl phthalate, t-butanol, hydrogen peroxide, and sodium salicylate; andMixtures containing derivatives of N-[4-(2- hydroxy-3-phenoxypropoxy)phenyl]- acetamide
3824.99.2938249929Other
3824.99.3138249931Of bismuth
3824.99.3238249932Of hydrosulfite compounds, of sulfoxylate compounds, or of both
3824.99.3338249933Of mercury
3824.99.3438249934Of molybdenum
3824.99.3538249935Of tungsten
3824.99.3638249936Of vanadium
3824.99.3938249939Other
3824.99.4138249941Fatty substances of animal or vegetable origin and mixtures thereof
3824.99.4938249949Mixtures that are in whole or in part of hydrocarbons derived in whole or in part from petroleum, shale oil or natural gas
3824.99.5038249950Chlorinated but not otherwise halogenated
3824.99.5538249955Other
3824.99.7038249970Mixtures of dibromo neopentyl glycol; Polydibromophenylene oxide; Tetrabromobisphenol-A-carbonate oligomers; and Electroplating chemical and electroless plating solutions and other materials for printed circuit boards, plastics and metal finishings
3824.99.7538249975Naphthenic acids, their water-insoluble salts and their esters
3824.99.9338249993Other
3907.29.0039072900Other
3907.30.0039073000Epoxide resins

Related orders — same primary origin

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At a glance

What does US trade case A-580-921 cover?

The antidumping measure covers Certain Monomers and Oligomers, imported from Korea. Case number A-580-921 is one of 540 active orders tracked in the database and was established 2026-07-28; the described product range determines which ten-digit lines inherit the cash-deposit obligation. Scope language in the Federal Register document controls.

Does case A-580-921 still collect cash deposits?

As of dataset vintage 2026-10-16T16:09:24Z, yes: importers entering covered goods post a cash deposit at the current rate until Commerce's next administrative review publishes revised margins in the Federal Register. Deposit rates can change every review cycle, so confirm the latest Federal Register notice before you quote a figure to your customs broker.

Which HTS codes fall under case A-580-921?

These HTS headings are recorded in the case linkage: 2916.12.10, 2916.12.50, 2916.14.10, 2916.14.20, 3824.99.11, 3824.99.19, 3824.99.21, 3824.99.25, 3824.99.26, 3824.99.29, 3824.99.31, 3824.99.32, 3824.99.33, 3824.99.34, 3824.99.35, 3824.99.36, 3824.99.39, 3824.99.41, 3824.99.49, 3824.99.50, 3824.99.55, 3824.99.70, 3824.99.75, 3824.99.93, 3907.29.00, 3907.30.00. Confirm the exact ten-digit code against the published scope language, because product descriptions rather than codes alone define the legal boundary of the order, and scope rulings occasionally widen or narrow which lines inherit the deposit obligation.

Primary sources: Federal Register — A-580-921 · USITC Harmonized Tariff Schedule — republished with provenance by exportsonar.com