HS Code 2832
Sulphites and Thiosulphates
HS code 2832 covers sulphites and thiosulphates used as oxygen scavengers in water treatment, food preservatives, and photographic fixing agents.
4-digit Section VIFCL | LCL
HS Code 2832 — Sulphites and Thiosulphates
This heading covers salts of sulphurous and thiosulphuric acids. These chemicals are used in food preservation, wine making to prevent oxidation, and in photography as fixing agents to dissolve unexposed silver halides.
What's included
- Sodium sulphite
- Sodium thiosulphate
- Potassium metabisulphite
- Ammonium thiosulphate
- Calcium sulphite
What's excluded
- Sodium sulphate → use
2833(Sulphates are at a higher oxidation state and belong in heading 2833.)
Common examples
- Sodium metabisulphite food grade
- Ammonium thiosulphate liquid fertilizer
- Potassium sulphite for photography
- Sodium thiosulphate penta crystals
Frequently asked questions
Are food-grade sulphites classified differently?
No, they still fall under HS 2832, but they must meet specific purity standards like FCC or E-numbers.
Trade & shipping notes
- Typical duty range: 0.0% - 5.5%
- Documentation: For food-grade shipments, health certificates or FDA prior notice may be required.
- Typical shipping mode: FCL | LCL
- Top exporters: China, Germany, Thailand, Turkey
- Top importers: USA, Brazil, India, Canada
Related HS codes
Key takeaway
Commonly split between industrial water treatment and high-purity food/photographic applications.
Related HS codes
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