HS Code for Sodium sulphite

Sodium sulphite is classified under HS code 2832.10. This code belongs to Chapter 28, heading 2832, which covers sulphites and thiosulphates. Sodium sulphite is a soluble sodium salt of sulphurous acid. The classification 2832.10 is specific to sodium sulphites, distinguishing them from other metal sulphites. This includes both the anhydrous form and the heptahydrate. The product is widely used as an antioxidant and preservative in the food industry to prevent discoloration of dried fruits and to preserve meats. It also serves as a dechlorinating agent in water treatment and a developer in the photography industry. The chemical structure, characterized by the SO3 group, is the primary determinant for its placement under heading 2832. Its role as a reducing agent is a defining chemical property that separates it from the more oxidized sulphates. In industrial settings, it is often used in the pulp and paper industry for the production of sulfite pulp. The classification remains the same regardless of the grade, whether it is food, photographic, or technical grade, provided it remains a chemically defined inorganic salt.

Products Included

• Sodium sulphite anhydrous
• Sodium sulphite crystals
• Food grade sodium sulphite
• Photographic grade sodium sulphite
• Sodium sulphite solution
• Sodium hydrogen sulphite (bisulphite) in some contexts

Common Misclassification

Most commonly confused with sodium sulphate (2833.11) because of the similar spelling and appearance. It is also sometimes confused with sodium metabisulphite, which is classified under 2832.20 as "other" sulphites in certain tariff schedules. Importers must ensure the oxygen count (SO3 vs SO4) is verified to avoid misclassification between 2832 and 2833.

FAQ

What is the HS code for sodium sulphite?

The HS code is 2832.10.

What is the difference between food grade and industrial sodium sulphite?

Food grade sodium sulphite must meet strict purity standards regarding heavy metals and arsenic, though both are classified under 2832.10 for customs purposes.