Commerce: L-lysine from China Antidumping Duty Investigation Preliminary Determination

ITA AD/CVD Case Announcements

Filed March 3rd, 2026

Detected March 4th, 2026

Summary

The U.S. Department of Commerce has made a preliminary affirmative determination in the antidumping duty investigation of L-lysine from China. The investigation found weighted-average dumping margins ranging from 41.22% to 72.18% for various Chinese producers and exporters.

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What changed

The U.S. Department of Commerce announced a preliminary affirmative determination on March 3, 2026, in the antidumping duty (AD) investigation of L-lysine originating from the People's Republic of China. This determination indicates that Commerce has found preliminary evidence of dumping, with weighted-average dumping margins identified for specific Chinese producers and exporters ranging from 41.22% to 72.18%. These preliminary findings will lead to the imposition of cash deposit requirements on future imports of L-lysine from China at these rates.

This preliminary determination means that U.S. Customs and Border Protection will require importers to deposit estimated duties based on these preliminary margins. The investigation will now proceed to a final determination by Commerce, and if affirmative, will be followed by a final injury determination by the U.S. International Trade Commission. Importers and exporters of L-lysine from China should prepare for potential cash deposit requirements and review their trade practices to ensure compliance with antidumping regulations.

What to do next

Review preliminary dumping margins for L-lysine from China.
Prepare for potential cash deposit requirements on imports based on preliminary rates.
Monitor the final determination by the Department of Commerce and the subsequent injury determination by the U.S. International Trade Commission.

Penalties

Cash deposit requirements on imports based on preliminary dumping margins ranging from 41.22% to 72.18%.

Source document (simplified)

Preliminary Affirmative Determination in the Antidumping Duty Investigations of L-lysine from the People’s Republic of China

On March 3, 2026, the U.S. Department of Commerce (Commerce) announced its preliminary affirmative determination in the antidumping duty (AD) investigation of L-lysine (lysine) from the People’s Republic of China (China).

Preliminary Dumping Rates

China

| Producer | Exporter | Weighted- Average Dumping Margin (percent) | Cash Deposit Rate (Adjusted for subsidy offsets) (percent) |
| --- | --- | --- | --- |
| Eppen Asia Pte. Ltd./ Heilongjiang Eppen Biotech Co., Ltd./ Inner Mongolia Eppen Biotech Co., Ltd./ Ningxia Eppen Biotech Co., Ltd. | Eppen Asia Pte. Ltd./ Heilongjiang Eppen Biotech Co., Ltd./ Inner Mongolia Eppen Biotech Co., Ltd./ Ningxia Eppen Biotech Co., Ltd. | 72.18 | Not Applicable |
| Anhui BBCA Biochemical Co., Ltd. | Zhengzhou Longgu Trading Co., Ltd. | 41.22 | Not Applicable |
| Eppen Asia Pte. Ltd./ Heilongjiang Eppen Biotech Co., Ltd./ Inner Mongolia Eppen Biotech Co., Ltd./ Ningxia Eppen Biotech Co., Ltd. | Zhengzhou Longgu Trading Co., Ltd. | 41.22 | Not Applicable |
| Shouguang Golden Corn Biotechnological Co., Ltd. | Zhengzhou Longgu Trading Co., Ltd. | 41.22 | Not Applicable |
| Anhui BBCA Biochemical Co., Ltd. | Agromate Sg Pte. Ltd. | 64.54 | Not Applicable |
| Heilongjiang Wanlirunda Biotechnology Co., Ltd. | Agromate Sg Pte. Ltd. | 64.54 | Not Applicable |
| Eppen Asia Pte. Ltd./ Heilongjiang Eppen Biotech Co., Ltd./ Inner Mongolia Eppen Biotech Co., Ltd./ Ningxia Eppen Biotech Co., Ltd. | Agromate Sg Pte. Ltd. | 64.54 | Not Applicable |
| Shouguang Golden Corn Biotechnological Co., Ltd. | Ainore (Tianjin) Trading Co., Ltd. | 64.54 | Not Applicable |
| Heilongjiang Wanlirunda Biotechnology Co., Ltd. | Ainore (Tianjin) Trading Co., Ltd. | 64.54 | Not Applicable |
| Anhui BBCA Biochemical Co., Ltd. | Aollen Biotech Co., Ltd. | 64.54 | Not Applicable |
| Changchun Dahe Bio Technology Development Co., Ltd. | Aollen Biotech Co., Ltd. | 64.54 | Not Applicable |
| Eppen Asia Pte. Ltd./ Heilongjiang Eppen Biotech Co., Ltd./ Inner Mongolia Eppen Biotech Co., Ltd./ Ningxia Eppen Biotech Co., Ltd. | Aollen Biotech Co., Ltd. | 64.54 | Not Applicable |
| Heilongjiang Wanlirunda Biotechnology Co., Ltd. | Aollen Biotech Co., Ltd. | 64.54 | Not Applicable |
| Henan Jinyufeng Biotechnology Co., Ltd. | Aollen Biotech Co., Ltd. | 64.54 | Not Applicable |
| Jilin Meihua Amino Acid Co., Ltd. | Aollen Biotech Co., Ltd. | 64.54 | Not Applicable |
| Qiqihar Longjiang Fufeng Biotechnologies Co., Ltd. | Aollen Biotech Co., Ltd. | 64.54 | Not Applicable |
| Shouguang Golden Corn Biotechnological Co., Ltd. | Aollen Biotech Co., Ltd. | 64.54 | Not Applicable |
| Zhucheng Dongxiao Biotechnology Co., Ltd. | Aollen Biotech Co., Ltd. | 64.54 | Not Applicable |
| Eppen Asia Pte. Ltd./ Heilongjiang Eppen Biotech Co., Ltd./ Inner Mongolia Eppen Biotech Co., Ltd./ Ningxia Eppen Biotech Co., Ltd. | Pegasus Ltd. | 64.54 | Not Applicable |
| Shandong Shouguang Juneng Golden Corn Development Co., Ltd. | Pegasus Ltd. | 64.54 | Not Applicable |
| Qiqihar Longjiang Fufeng Biotechnologies Co., Ltd. | Pegasus Ltd. | 64.54 | Not Applicable |
| Qiqihar Longjiang Fufeng Biotechnologies Co., Ltd. | Qiqihar Longjiang Fufeng Biotechnologies Co., Ltd. | 64.54 | Not Applicable |
| Shouguang Golden Corn Biotechnological Co., Ltd. | Shouguang Golden Corn Biotechnological Co., Ltd. | 64.54 | Not Applicable |
| Shouguang Golden Corn Biotechnological Co., Ltd., | Zhengzhou Heshu Stockbreeding Development Co., Ltd. | 64.54 | Not Applicable |
| Eppen Asia Pte. Ltd./ Heilongjiang Eppen Biotech Co., Ltd./ Inner Mongolia Eppen Biotech Co., Ltd./ Ningxia Eppen Biotech Co., Ltd. | Zhengzhou Heshu Stockbreeding Development Co., Ltd. | 64.54 | Not Applicable |
| China-wide | | 142.59* | Not Applicable |
* This rate is based on facts available with adverse inferences.

Import Statistics

| China | 2022 | 2023 | 2024 |
| --- | --- | --- | --- |
| Volume (KG) | 29,065,959 | 56,120,258 | 77,933,588 |
| Value (USD) | $47,105,231 | $66,288,213 | $95,953,899 |
Source: U.S. Census Bureau, accessed through S&P Global Trade Atlas (Harmonized Tariff Schedule of the United States (HTSUS) subheadings 2922.41.0090). Imports of lysine enter under HTSUS subheadings that may cover subject and non-subject merchandise. Therefore, publicly available import data may not accurately reflect actual imports of lysine covered by the scope of the investigations.

Next Steps

Based on the date these preliminary determinations are published in the Federal Register, the final determination of the AD investigation of lysine from China should be announced around July 20, 2026.
Commerce is also conducting concurrent countervailing duty (CVD) investigations of lysine from China.
The U.S. International Trade Commission (ITC) is running a concurrent injury determination investigation. For more information related to the ITC’s timeline, please refer to the ITC’s calendar.

Other Case Information

The petitioner is the Lysine Fair Trade Coalition, whose members are Archer Daniels Midland Company (Chicago, IL), CJ Bio America, Inc. (Fort Dodge, IA), and Evonik Corporation (Piscataway, NJ).
For general information and next steps, please refer to a list of preliminary FAQs.
Additional case information, including the scope of the investigations, are 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 number A-570-215.
For more information on subsidy programs, please refer to the subsidies enforcement library.
To date, Commerce maintains 819 AD and countervailing duty orders that provide relief to American companies and industries impacted by unfair trade.

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