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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If formulated as diammonium phosphate fertilizer
Fertilizer formulations fall under Chapter 31 regardless of base compound.
If registered as plant growth regulator
Pesticides and disinfectants have specific headings in Chapter 38.
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Import Tips & Compliance
• EPA pesticide registration required; provide formulation analysis showing >90% phosphite; distinguish from phosphate fertilizers
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.
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.
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.