HS Code for Sodium dithionite

Sodium dithionite, also known as sodium hydrosulphite, is classified under HS code 2831.10. This classification is situated within Chapter 28, which covers inorganic chemicals, precious metals, rare-earth metals, radioactive elements, or isotopes. Heading 2831 is specifically designated for dithionites and sulphoxylates. Within this heading, the single-dash subheading 2831.10 is reserved for those of sodium. Sodium dithionite is a powerful reducing agent used extensively in the textile industry for vat dyeing and in the pulp and paper industry for bleaching. The classification is determined by GRI 1, based on the chemical identity of the substance. Even if the sodium dithionite is stabilized with other chemicals to prevent spontaneous combustion or decomposition, it remains classified under 2831.10, provided it retains its character as a separate chemically defined compound as per the notes to Chapter 28.

Products Included

• Sodium dithionite (Sodium hydrosulphite)
• Stabilized sodium dithionite
• Sodium dithionite in powder or granular form
• Technical grade sodium dithionite

Common Misclassification

Sodium dithionite is frequently confused with sodium sulphite (HS code 2832.10) or sodium metabisulphite (HS code 2832.20). While these chemicals are related and often used in similar industrial processes, they are chemically distinct salts of different sulfur-containing acids. Another potential misclassification is 2833.11 (disodium sulphate), which is a much more stable and common salt. It is vital to distinguish between dithionites (2831) and sulphites/thiosulphates (2832) to ensure regulatory compliance, especially since sodium dithionite is often regulated as a hazardous material (Class 4.2) for transport.

FAQ

What is the HS code for sodium dithionite?

The HS code for sodium dithionite is 2831.10, which covers dithionites and sulphoxylates of sodium.

Is sodium hydrosulphite the same as sodium dithionite in the HS system?

Yes, sodium hydrosulphite is a common commercial name for sodium dithionite, and both are classified under HS code 2831.10.