U.S. Announces Antidumping and Countervailing Duties on Alkyl Phosphate Esters from China

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The U.S. Department of Commerce has issued new orders on certain alkyl phosphate esters from the People’s Republic of China. These orders enforce both antidumping (AD) and countervailing (CVD) duties. The decision comes after final positive determinations by the Department of Commerce and the U.S. International Trade Commission (ITC).

What’s Included in the Orders

These orders apply to specific chemical products called alkyl phosphate esters. These are phosphorus-based ester chemicals. They include compounds like tris (2-chloroisopropyl) phosphate (TCPP), tris (1,3-dichloroisopropyl) phosphate (TDCP), and triethyl phosphate (TEP). The orders cover both halogenated and non-halogenated esters with a phosphorus content of at least 6.5% and a viscosity between 1 and 2000 mPa·s (at 20-25°C).

The products are classified under three Harmonized Tariff Schedule of the United States (HTSUS) codes: 2919.90.5050, 2919.90.5010, and 3824.99.5000. Blends that have at least 20% alkyl phosphate esters by weight are also covered.

Why These Duties Were Ordered

On April 25, 2025, the Department of Commerce found that alkyl phosphate esters from China were both sold at less than fair value (antidumping) and subsidized by the Chinese government (countervailable subsidies). The ITC agreed, finding that U.S. companies were harmed by these imports.

Antidumping Duty Details

The antidumping duty order affects unliquidated entries of alkyl phosphate esters from China entered after December 4, 2024. U.S. Customs and Border Protection (CBP) will now collect duties on these imports. Exporters and producers from China are assigned different rates.

The China-wide entity rate is based on adverse facts.

Duration of Rules

Suspension of liquidation remains in effect from the date of the ITC’s final affirmative injury determination published in the Federal Register, June 11, 2025. There is a gap between June 2, 2025 (the end of provisional measures), until the date of ITC’s determination publication, where no duties are collected.

Countervailing Duty Details

For countervailing duties, the order applies to entries imported after October 1, 2024. The following subsidy rates apply:

*Rate is based on adverse facts.

Scope of Products

The orders cover:

• Tris (2-chloroisopropyl) phosphate (TCPP)
• Tris (1,3-dichloroisopropyl) phosphate (TDCP)
• Triethyl phosphate (TEP)
• Any blends containing 20% or more of these esters by weight

Products are included even if they consist of a single isomer or mixtures different from those usually sold.

Process for Interested Parties

The Commerce Department will establish an annual inquiry service list for this order. Interested parties must submit an entry of appearance in the Antidumping and Countervailing Duty Electronic Service System (ACCESS) within 30 days after the order’s publication to be included. Petitioners and foreign governments will be added automatically each year after their initial entry.

Official Publication

This action was published on June 11, 2025, in the Federal Register (Vol. 90, No. 111, pages 24579–24582).

More information on such duty orders is available at: https://www.trade.gov/data-visualization/adcvd-proceedings

Contacts for Further Information

• Dennis McClure (AD Issues): (202) 482-5973
• Benjamin Nathan (CVD Issues): (202) 482-3834

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