Sodium Phosphite
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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If mono- or disodium phosphates
Different sodium phosphate salts have specific subheadings based on protonation state.
If in aqueous chemical preparations
Prepared chemical solutions not meeting purity for chemically defined compounds go to 3824.
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Import Tips & Compliance
• Specify hydrate form (e.g
• pentahydrate) in documentation; test for phosphonate content >95%; check EPA registration for water treatment applications
Related Products under HTS 2835.10.00.00
Sodium Hypophosphite
Sodium hypophosphite (NaH2PO2) is a white crystalline powder used as a reducing agent in chemical synthesis and electroless nickel plating. It falls under HTS 2835.10.00.00 as a phosphinate (hypophosphite) of an inorganic base, meeting the chemically defined criteria of Chapter 28. This compound is essential in industrial processes for metal surface treatment.
Calcium Hypophosphite
Calcium hypophosphite (Ca(H2PO2)2) is an inorganic salt used in pharmaceuticals and as a food additive for calcium supplementation. Classified under HTS 2835.10.00.00 as a phosphinate (hypophosphite) derived from an inorganic base. It provides a source of hypophosphite ions in various applications.
Potassium Phosphite
Potassium phosphite (KH2PO3) serves as a fungicide and plant nutrient in agriculture, promoting plant health. Under HTS 2835.10.00.00 as a phosphonate (phosphite) of potassium, an inorganic base. It is typically supplied as a liquid fertilizer concentrate.
Ammonium Hypophosphite
Ammonium hypophosphite (NH4H2PO2) is used in chemical reduction processes and polymer stabilizers. Classified as a phosphinate under HTS 2835.10.00.00 since chapter notes include ammonium salts. It is a white crystalline solid with strong reducing properties.
Manganese Hypophosphite
Manganese hypophosphite (Mn(H2PO2)2) is a specialty chemical used in nutritional supplements and catalysts. It qualifies under HTS 2835.10.00.00 as a metal phosphinate (hypophosphite). The compound provides both manganese and hypophosphite functionality.
Disodium Phosphite Pentahydrate
Disodium phosphite pentahydrate (Na2HPO3·5H2O) is a hydrated form used in analytical chemistry and as a reagent. Classified under HTS 2835.10.00.00 as a phosphonate (phosphite) despite hydration, per chemically defined rules. It appears as colorless crystals.