Potassium Sodium Sulfite
Potassium sodium sulfite (KNaSO3), a double salt used in textile bleaching. Under Chapter 28 Note 5, double salts are classified in heading 28.42 unless the context requires otherwise; however, as a sulfite, it is specifically covered by heading 28.32 and thus falls under tariff item 2832.20.00.
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 double or complex salt not specifically covered by heading 28.32
Chapter 28 Note 5 directs double salts to heading 28.42 unless otherwise specified.
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
• Confirm the exact ratio of potassium to sodium, as this may affect the classification
• Provide the chemical formula and intended use to CBSA to avoid confusion with other sulfite salts
Related Products under Tariff item 2832.20.00
Ammonium Sulfite Solution 40%
A 40% aqueous solution of ammonium sulfite ((NH4)2SO3), used in wastewater treatment and as an oxygen scavenger. This solution is a separate chemically defined compound dissolved in water, meeting the requirements of Chapter 28 Note 1(b), and falls under tariff item 2832.20.00 as an 'other sulphite'.
Barium Sulfite Precipitated
Precipitated barium sulfite (BaSO3), a chemically defined inorganic compound used in X-ray contrast media and pigments. It qualifies as an 'other sulphite' under tariff item 2832.20.00, as it is not excluded by Chapter 28 notes.
Calcium Sulfite Hemihydrate
Calcium sulfite hemihydrate (CaSO3·0.5H2O), a white powder byproduct from flue gas desulfurization used in construction materials. As a chemically defined compound of an inorganic base, it falls under tariff item 2832.20.00 as an 'other sulphite'.
Cobalt Sulfite
Cobalt sulfite, a chemically defined metal sulfite used in catalyst preparation and plating baths. It is classified under tariff item 2832.20.00 as an 'other sulphite' of an inorganic base, consistent with Chapter 28.
Copper Sulfite Basic
Basic copper sulfite, a copper salt of sulfurous acid used in fungicide synthesis. It is a chemically defined inorganic compound and falls under tariff item 2832.20.00 as an 'other sulphite'.
Ferrous Sulfite Crystals
Ferrous sulfite (FeSO3) crystals, employed in analytical chemistry and reducing applications. This chemically defined iron sulfite meets the criteria for tariff item 2832.20.00 as an 'other sulphite'.