U.S. Slaps Duties on Chinese Industrial Chemical Imports
Published Date: 6/25/2026
Notice
Summary
The U.S. government found that methylene diphenyl diisocyanate (MDI) from China is being sold unfairly cheap, hurting American businesses. They fixed some small errors in their earlier decision and officially started charging extra duties on these imports starting June 25, 2026. This means Chinese MDI will cost more in the U.S., helping local companies compete fairly.
Analyzed Economic Effects
3 provisions identified: 0 benefits, 1 costs, 2 mixed.
Antidumping Duties Imposed on Chinese MDI
Commerce issued an antidumping duty order on methylene diphenyl diisocyanate (MDI) from China effective June 25, 2026. U.S. Customs and Border Protection (CBP) must require cash deposits equal to the estimated weighted-average dumping margins listed (87.25% for Covestro Polymers and Wanhua-related entries; 161.61% for the China-wide entity), and Commerce will assess antidumping duties on unliquidated entries of MDI entered or withdrawn for consumption on or after September 16, 2025 (subject to the provisional measures exclusions described below).
Retroactive Assessment Window Defined
Antidumping duties will be assessed on unliquidated entries of MDI from China entered or withdrawn for consumption on or after September 16, 2025, the date of the Preliminary Determination, but entries made on or after March 14, 2026 (the day provisional measures ended) until the day before publication of the ITC's final injury determination will be liquidated without regard to antidumping duties. Suspension of liquidation and the collection of cash deposits resume on publication of the ITC's final determination in the Federal Register.
Amended Determination Corrects Calculations
Commerce amended its final determination to correct ministerial errors in calculating surrogate values for natural gas and nitrogen, the surrogate selling, general, and administrative (SG&A) expense ratio, the surrogate profit ratio, and normal value. These corrections are reflected in the Amended Final Determination and associated ministerial error memorandum.
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Key Dates
Department and Agencies
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