HS Code 2831
Dithionites and Sulphoxylates
HS code 2831 is for dithionites and sulphoxylates, primarily used as powerful reducing agents in textile dyeing, paper bleaching, and chemical processing.
HS Code 2831 — Dithionites and Sulphoxylates
These chemicals are powerful reducing agents. Sodium dithionite (sodium hydrosulphite) is the most commercially significant member, widely used in the textile industry for vat dyeing and the paper industry for pulp bleaching.
What's included
- Sodium dithionite
- Zinc dithionite
- Sodium sulphoxylate
- Zinc sulphoxylate
What's excluded
- Sodium sulphite → use
2832(Sulphites are distinct chemical species classified under their own heading.)
Common examples
- Sodium hydrosulphite 85% powder
- Zinc dithionite solution
- Sodium formaldehyde sulphoxylate
- Vat dyeing reducing agents
Frequently asked questions
Why is sodium dithionite dangerous to ship?
It is prone to self-heating and can ignite spontaneously if it becomes damp, making it a Class 4.2 hazardous material.
Trade & shipping notes
- Typical duty range: 5.0% - 6.5%
- Documentation: Weatherproof and airtight packaging declarations are often required by carriers.
- Typical shipping mode: FCL
- Top exporters: China, Germany, India, Italy
- Top importers: USA, Turkey, Bangladesh, Pakistan
Related HS codes
Key takeaway
A high-risk commodity for logistics due to self-heating properties, critical for the global textile value chain.
Related HS codes
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