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.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is a phosphate instead of a phosphite
Phosphates are classified separately from phosphonates in the same heading.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the product is pure and not mixed with other additives
• Provide a safety data sheet (SDS) for handling
• Check if the product is subject to Canadian environmental regulations for water treatment chemicals
Related Products 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.