Phosphinates (hypophosphites) and phosphonates (phosphites)
Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined: > Phosphinates (hypophosphites) and phosphonates (phosphites)
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified 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.
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.
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.
Zinc Phosphite
Zinc phosphite (ZnHPO3) functions as a corrosion inhibitor and flame retardant in coatings. It is a phosphonate under HTS 2835.10.00.00 as a zinc salt meeting inorganic base criteria. The white powder disperses well in polymer matrices.
Sodium Hypophosphite Monohydrate
Sodium hypophosphite monohydrate (NaH2PO2·H2O) is the common commercial form for electroless plating baths. HTS 2835.10.00.00 covers this phosphinate hydrate as chemically defined. It provides controlled reduction in metal deposition processes.
Magnesium Phosphite
Magnesium phosphite (MgHPO3) serves in fire retardants and water treatment applications. As a phosphonate of magnesium, it falls under HTS 2835.10.00.00 per chapter definitions excluding section V products. Typically a white insoluble powder.