Phosphinates (hypophosphites) and phosphonates (phosphites)
Phosphinates (hypophosphites), phosphonates (phosphites) and phosphates; polyphosphates, whether or not chemically defined. > Phosphinates (hypophosphites) and phosphonates (phosphites) > Phosphinates (hypophosphites) and phosphonates (phosphites)
Duty Rate (from China)
Products classified under Tariff item 2835.10.00
Ammonium Hypophosphite
Ammonium hypophosphite (NH4H2PO2) is a white crystalline salt used as a reducing agent in chemical synthesis and as a polymer stabilizer. It is a phosphinate (hypophosphite) of an inorganic base, ammonium, and meets the definition of a separate chemically defined compound under Chapter 28. This tariff item covers phosphinates and phosphonates, including ammonium salts.
Calcium Hypophosphite
Calcium hypophosphite (Ca(H2PO2)2) is an inorganic salt used in pharmaceuticals and as a calcium supplement in food products. It is a phosphinate (hypophosphite) of calcium, an inorganic base, and qualifies as a separate chemically defined compound under Chapter 28. This tariff item specifically covers phosphinates and phosphonates.
Disodium Phosphite Pentahydrate
Disodium phosphite pentahydrate (Na2HPO3·5H2O) is a hydrated form of sodium phosphite used as a reagent in analytical chemistry. Despite the water of hydration, it remains a separate chemically defined compound under Chapter 28, as hydrates are not excluded. It is a phosphonate (phosphite) of an inorganic base, sodium, and falls under this tariff item.
Magnesium Phosphite
Magnesium phosphite (MgHPO3) is used in fire retardants and water treatment applications. It is a phosphonate (phosphite) of magnesium, an inorganic base, and qualifies as a separate chemically defined compound under Chapter 28. This tariff item covers phosphonates, including magnesium salts.
Manganese Hypophosphite
Manganese hypophosphite (Mn(H2PO2)2) is a specialty chemical used in nutritional supplements and as a catalyst. It is a phosphinate (hypophosphite) of manganese, an inorganic base, and meets the definition of a separate chemically defined compound under Chapter 28. This tariff item covers phosphinates, including metal salts.
Potassium Phosphite
Potassium phosphite (KH2PO3) is used as a fungicide and plant nutrient in agriculture. It is a phosphonate (phosphite) of potassium, an inorganic base, and qualifies as a separate chemically defined compound under Chapter 28. This tariff item covers phosphonates, including potassium salts.
Sodium Hypophosphite
Sodium hypophosphite (NaH2PO2) is a white crystalline powder used as a reducing agent in chemical synthesis and electroless nickel plating. It is a phosphinate (hypophosphite) of sodium, an inorganic base, and meets the definition of a separate chemically defined compound under Chapter 28. This tariff item specifically covers phosphinates.
Sodium Hypophosphite Monohydrate
Sodium hypophosphite monohydrate (NaH2PO2·H2O) is the common commercial form used in electroless plating baths. It is a phosphinate (hypophosphite) of sodium, and the water of hydration does not affect its classification as a separate chemically defined compound under Chapter 28. This tariff item covers phosphinates, including hydrates.
Sodium Phosphite
Sodium phosphite (Na2HPO3) is a reducing agent and antioxidant used in water treatment and polymer production. It is a phosphonate (phosphite) of sodium, an inorganic base, and qualifies as a separate chemically defined compound under Chapter 28. This tariff item covers phosphonates, including sodium salts.
Zinc Phosphite
Zinc phosphite (ZnHPO3) functions as a corrosion inhibitor and flame retardant in coatings. It is a phosphonate (phosphite) of zinc, an inorganic base, and meets the definition of a separate chemically defined compound under Chapter 28. This tariff item covers phosphonates, including zinc salts.