United States Sets Antidumping and Countervailing Duties on Hexamethylenetetramine From China

Estimated reading time: 8 minutes

What Happened

Commerce and the ITC made final decisions that Chinese hexamine sold in the U.S. was both dumped at less than fair value and subsidized by the Chinese government. This was found to hurt U.S. manufacturers.

Important Dates

  • These orders apply starting September 11, 2025.
  • Antidumping duties apply to service entries from May 6, 2025.
  • Countervailing duties apply to entries from March 7, 2025.

Duty Rates

  • Antidumping Duties: The cash deposit rate for all Chinese exporters is set at 394.65%, based on a dumping margin of 405.19%. This applies to the “China-wide Entity.”
  • Countervailing Duties: The cash deposit rate is 420.73% for all named Chinese companies and for all others. The companies include Changzhou Highassay Chemical Co., China Bluestar International Chemical Co., Ltd, Fengchen Group Co., Ltd, Hutubi Ruiyuantong Chemicals Co., Ltd, Jiangsu Guotai Guomian Trading, Jiaozuo Runhua Chemical Industry Co., and Qingdao Sun Chemical Corp. Ltd.

How It Works

U.S. Customs and Border Protection (CBP) will collect duties on imports of hexamine from China, based on these rates.

  • For antidumping duties, CBP will collect the difference between the normal value and the exported price. Rates apply to entries after May 6, 2025, except some entries after provisional measures expired before the final ITC injury determination.
  • For countervailing duties, CBP will collect duties equal to the subsidy rate. This applies to entries from March 7, 2025, except for entries during certain periods when provisional measures expired.

Product Scope

The orders cover granular hexamine from China, which has a particle size of 5 millimeters or less. It does not matter if the hexamine is stabilized or unstabilized. The orders apply whether it is blended, mixed, or ground with other products, as long as it contains at least 50% hexamine by weight.

Hexamine may also be called:

  • Hexamethylene tetramine
  • HMT
  • HMTA
  • 1,3,5,7-tetraazaadamantanemethenamine
  • 1,3,5,7-tetraazatricyclo{3.3.1.13,7}decane

It is classified under HTSUS code 2933.69.5000. The written description decides if a product is covered, not just the HTS code.

Suspension of Liquidation

CBP will continue to suspend the processing (liquidation) of all affected entries until further instructions. The AD and CVD orders are effective as of the Federal Register publication date.

Annual Inquiry Service Lists

Commerce will maintain an annual service list for each order or investigation. Law firms, petitioners, foreign governments, and interested parties must enter appearances on Commerce’s online system, ACCESS. This ensures they are notified of any new scope applications or rulings related to these orders.

What It Means

Any U.S. importer of hexamine from China must now pay very high cash deposits. These new trade orders are designed to protect U.S. industry from unfairly traded imports.

Contact Information

For questions about antidumping, contact Thomas Cloyd at (202) 482-1246. For countervailing duties, contact Eliza DeLong at (202) 482-3878, both at the U.S. Department of Commerce.

Reference

This order was signed by Christopher Abbott, Deputy Assistant Secretary for Policy and Negotiations, on September 8, 2025. For more details and a list of all ongoing AD and CVD orders, visit https://enforcement.trade.gov/stats/iastats1.html.


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This article includes content collected from the Federal Register (federalregister.gov). The content is not an official government publication. This article is for informational purposes only and does not constitute legal advice. For case-specific consultation, please contact us. Read our full Legal Disclaimer, which also includes information on translation accuracy.