Final Affirmative Determination in the Antidumping Investigation of Methylene Diphenyl Diisocyanate from China
Final Affirmative Determination in the Antidumping Duty Investigation of Methylene Diphenyl Diisocyanate from the People’s Republic of China
On April 8, 2026, the U.S. Department of Commerce (Commerce) announced its final affirmative determinations in the antidumping duty (AD) investigation of Methylene Diphenyl Diisocyanate from the People’s Republic of China (China).
Final Dumping Margins
China
| Exporter | Producer | Weighted- Average Dumping Rate Margin (percent) |
|---|---|---|
| Covestro Polymers (China) Co., Ltd. | Covestro Polymers (China) Co., Ltd. | 85.11 |
| Shandong Mingko Co., Ltd | Wanhua Chemical Group Co., Ltd | 85.11 |
| China-Wide Entity* | 159.04* | |
* Rate based on facts available with adverse inferences.
Import Statistics
| China | 2022 | 2023 | 2024 |
|---|---|---|---|
| Volume (KG) | 163,887,704 | 175,534,602 | 198,761,010 |
| Value (USD) | $345,563,208 | $230,840,709 | $241,014,447 |
Source: U.S. Census Bureau, accessed through S&P Global Trade Atlas (Harmonized Tariff Schedule of the United States (HTSUS)) subheadings 2929.10.8010 and 3909.31.0000). Imports of methylene diphenyl diisocyanate enter under HTSUS subheadings that may cover subject and non-subject merchandise. Therefore, publicly available import data may not accurately reflect actual imports of methylene diphenyl diisocyanate covered by the scope of the investigation.
Next Steps
- The International Trade Commission (ITC) is running concurrent injury determination investigations. For more information related to the International Trade Commission’s timeline, please refer to the ITC’s calendar.
Other Case Information
- The petitioner is the Ad Hoc MDI Fair Trade Coalition, whose members are BASF Corporation (Florham Park, NJ) and The Dow Chemical Company (Midland, MI).
- For general information and next steps, please refer to a list of FAQs for the final determination.
- Additional case information, including the scope of the investigations, is on file electronically via Enforcement and Compliance’s Antidumping and Countervailing Duty Centralized Electronic Service System (ACCESS). Once you log in, please refer to case numbers A-570-200.
- To date, Commerce maintains 828 AD and CVD orders that provide relief to American companies and industries impacted by unfair trade.