The U.S. Department of Commerce has announced the results of its second expedited sunset review of the antidumping duty order on calcium hypochlorite from the People’s Republic of China.

The Department found that ending the antidumping duty order would likely cause dumping from China to continue or happen again. The dumping margins could be as high as 210.52 percent.

On January 30, 2015, the Department of Commerce put an antidumping duty order on calcium hypochlorite from China. On June 2, 2025, the Department started the second sunset review, as required by law.

Innovative Water Care, LLC (IWC), a company in the U.S., showed support for keeping the duties. IWC sent a notice of intent to participate by June 17, 2025. IWC is a domestic producer of a similar product.

The Department gave notice to the U.S. International Trade Commission (ITC) that there was support from a domestic interested party. This notice went to the ITC on July 1, 2025.

IWC sent its full response by July 2, 2025, staying within the 30-day deadline. There were no responses from any parties in China. No hearing was requested. On July 21, 2025, the Department again notified the ITC that no responses were received from any Chinese parties.

Since only the U.S. party responded, the Department conducted an expedited (120-day) sunset review.

Scope of the Order

The order covers calcium hypochlorite from China. Details on the product scope are listed in the Issues and Decision Memorandum, available at http://access.trade.gov.

Analysis and Final Results

All issues brought up in the sunset review were discussed in the Issues and Decision Memorandum. This document is public and can be found on the Enforcement and Compliance’s Antidumping and Countervailing Duty Centralized Electronic Service System (ACCESS).

The Department has decided that ending the antidumping order would likely let dumping continue or happen again. Dumping margins could be up to 210.52 percent.

Administrative Protective Orders

This notice reminds interested parties who are under an Administrative Protective Order (APO) to follow the rules on handling information, as stated in 19 CFR 351.305.

Publication

These results and this notice are issued and published under sections 751(c), 752(c), and 777(i)(1) of the Tariff Act of 1930, and related regulations.

The notice is dated 2025-09-26, and signed by Christopher Abbott, Deputy Assistant Secretary for Policy and Negotiations.

For more details, readers can review the Issues and Decision Memorandum.