Urethane Blog
Preliminary MDI ADD Ruling
September 18, 2025
Preliminary ruling made in US MDI antidumping investigation

Washington DC, US – The US Department of Commerce has announced its preliminary determination in the antidumping duty investigation of MDI imports from China. The investigation was in response to a petition made by the Ad Hoc MDI Fair Trade Coalition, which comprises BASF and Dow. Both companies manufacture MDI on the US Gulf coast, BASF in Geismar, Louisiana and Dow in Freeport, Texas.
Preliminary dumping rates of 376.12% were announced for Covestro Polymers (China), and Wanhua Chemical plus its exporter Shandong Mingko. For other companies in China, the rate is 511.75%, which the department said was “based on facts available with adverse inferences”.
The announcement was accompanied by MDI import statistics, although the department stated that the way the data are accumulated “may not accurately reflect actual imports of MDI covered by the scope of the investigation”. This is because the imports enter the country under tariff schedule subheadings that may cover both subject and non-subject merchandise.
Unless it is postponed, the final determination of the antidumping investigation is set to be announced on 25 November. The US International Trade Commission is also running an injury determination investigation.
https://www.utech-polyurethane.com/news/preliminary-ruling-made-us-mdi-antidumping-investigation
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