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'.
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 specifically sodium sulphite
Sodium sulphites have their own dedicated tariff item under 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 solution is clearly labelled with its chemical composition and concentration for CBSA inspection
• Provide a safety data sheet (SDS) if required, as ammonium sulfite may be subject to workplace hazardous materials regulations
Related Products under Tariff item 2832.20.00
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'.
Lithium Sulfite Anhydrous
Anhydrous lithium sulfite (Li2SO3), used in lithium battery electrolytes. As a chemically defined alkali metal sulfite, it is classified under tariff item 2832.20.00 as an 'other sulphite'.