2835.10.00.00/Sodium Phosphite/Mexico

Sodium Phosphite from Mexico

Sodium phosphite (Na2HPO3) is a reducing agent and antioxidant used in water treatment and polymer production. It is classified in HTS 2835.10.00.00 as a phosphonate (phosphite) compound meeting Chapter 28 definitions. The product appears as a white powder or aqueous solution.

Duty Rate — Mexico → United States

13.1%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico

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Import Tips

• Specify hydrate form (e.g

• pentahydrate) in documentation; test for phosphonate content >95%; check EPA registration for water treatment applications