Mexico Initiates Review of its Antidumping Duty Measure on Liquid Caustic Soda from the United States
Mexico Initiates Review of its Antidumping Duty Measure on Liquid Caustic Soda from the United States
On July 11, 2025, Mexico’s International Commercial Practices Unit (UPCI) initiated an expiry review of its antidumping (AD) duty measure on imports of liquid caustic soda from the United States. Mexico’s AD measure on liquid caustic soda has been in place since July 12, 1995. The AD duties currently in place for U.S. producers/exporters are $195 USD per metric ton.
What is an expiry review?
An expiry review is also known as a sunset review, and its purpose is to determine whether the revocation of the AD or countervailing measure would be likely to lead to the continuation or recurrence of dumping or unfair subsidization and material injury to the domestic industry. The measure may only be extended beyond five years, counting from the date on which a measure was first instituted or the most recently completed expiry review, if both conditions are met.
How can I participate?
U.S. companies involved in the production, sale, or distribution of the subject goods should register as interested parties as soon as possible. Registration is the first step in protecting your rights in a foreign trade remedy proceeding. Doing so allows you to access the case records and submit information and comments, ensuring that your views are considered. To register as an interested party, please follow the instructions listed in the Initiation Notice.
| KEY DATES | |
|---|---|
| Period of Investigation | April 1, 2024, through March 31, 2025 |
| Initial Questionnaire Response Deadline | August 20, 2024 |
| Preliminary Determination* | TBA |
| Final Determination* | March 28, 2026 |
*Estimated
Product Under Review
The subject merchandise is liquid caustic soda, which is sodium hydroxide in an aqueous solution. It is a versatile and widely used chemical with industrial and household applications, including for use in chemical manufacturing, aluminum processing, water treatment, paper production, and soap manufacturing.
The subject merchandise is classified under the following Harmonized Tariff Schedule (HS) code: 2815.12.01. A complete description of the scope can be found under Section G of the Initiation Notice.
Contact Us
The U.S. Department of Commerce’s Office of Trade Remedy Compliance supports U.S. companies facing foreign trade remedy proceedings (antidumping duty, countervailing duty, and safeguard actions) and ensures foreign governments comply with their international trade obligations. Should you have any questions, please contact TRCS@trade.gov. For more information, visit Office of Trade Remedy Compliance.