Potassium Dithionite
> Potassium dithionite is a strong reducing agent used in chemical synthesis and wastewater treatment. As a chemically defined inorganic salt of dithionite, it is classified under tariff item 2831.90.00 for other dithionites. It is not organically stabilized and meets Chapter 28 Note 1 criteria.
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 |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is sodium dithionite instead
Sodium dithionite has its own subheading.
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 product is free of organic stabilizers; if stabilized with organic substances, it still falls under 28.31 but verify the specific tariff item
• Keep certificates of analysis to prove chemical purity for CBSA classification
• Check if the product is subject to export controls from the country of origin
Related Products under Tariff item 2831.90.00
Ammonium Dithionite Solution
> Ammonium dithionite in aqueous solution acts as a reducing bleach for textiles and paper. As a chemically defined inorganic compound of dithionite, it falls under tariff item 2831.90.00 for other dithionites and sulphoxylates. The aqueous solution is a normal method of putting up for safety and transport, consistent with Chapter 28 Note 1.
Sodium Dithionite
> Sodium dithionite, also known as sodium hydrosulfite, is a white crystalline powder used as a reducing agent in textile bleaching and vat dyeing. It is a chemically defined inorganic compound and falls under tariff item 2831.90.00 as 'other' dithionites, since it is not specifically named in the subheading.
Sodium Formaldehyde Sulfoxylate
> Sodium formaldehyde sulfoxylate is a sulfoxylate reducing agent used in polymerizations and dye discharge printing. It is a chemically defined inorganic compound, and as a sulfoxylate it falls under tariff item 2831.90.00 for other dithionites and sulphoxylates. The product is not organically stabilized in a way that excludes it from Chapter 28.
Zinc Dithionite
> Zinc dithionite is an inorganic salt used in industrial reducing applications, particularly in pulp and paper bleaching. As a chemically defined dithionite, it falls under tariff item 2831.90.00 for other dithionites. It meets Chapter 28 Note 1 requirements as a separate chemical compound.