HS Code for Zinc dithionite

Zinc dithionite is classified under HS code 283190. This code is situated within Chapter 28, which covers inorganic chemicals, precious metal compounds, and isotopes. Specifically, heading 2831 covers dithionites and sulphoxylates. While sodium dithionite is the most common and has its own subheading (283110), all other metal dithionites, including zinc dithionite, are grouped under the 'other' category of 283190. Zinc dithionite (ZnS2O4), also known as zinc hydrosulfite, is a powerful reducing agent. Its classification is based on its chemical identity as a defined inorganic salt. In industrial applications, it is often used for bleaching groundwood paper pulp and textiles. For customs purposes, the product must be a separate chemically defined compound. If the zinc dithionite is mixed with other substances for a specific functional use, such as a prepared dye or a finished laundry detergent, it might be moved to Chapter 32 or 34, but in its pure or stabilized chemical form, 283190 is the correct designation.

Products Included

• Zinc dithionite (Zinc hydrosulfite)
• Zinc sulphoxylate
• Stabilized zinc dithionite powders
• Aqueous solutions of zinc dithionite

Common Misclassification

The most frequent misclassification for zinc dithionite is HS code 283110, which is strictly for sodium dithionite. Because sodium dithionite is more widely traded, it is often used as a default, but this is incorrect for zinc-based compounds. Another common error is classification under 283329 (other sulfates). While they sound similar, dithionites (S2O4) and sulfates (SO4) are chemically distinct salts with different oxidation states and industrial properties. Finally, if the product is used as a pigment, it might be confused with 320649, though 283190 remains correct for the pure chemical substance.

FAQ

What is the HS code for zinc dithionite?

The HS code for zinc dithionite is 283190.

Is zinc dithionite the same as zinc sulfate?

No, they are different chemicals. Zinc dithionite (283190) is a reducing agent used for bleaching, while zinc sulfate (283329) is commonly used in fertilizers and animal feed.