HS Code for Sodium bisulphite

Sodium bisulphite, also known as sodium hydrogen sulphite, is classified under HS code 2832.10. This classification is determined by its status as an inorganic salt of an oxoacid of sulfur. Heading 2832 is dedicated to sulphites and thiosulphates. Within this heading, the Harmonized System provides a specific subheading, 2832.10, for sulphites of sodium. The classification is based on the chemical structure (NaHSO3). In the context of international trade, Chapter 28 covers inorganic chemicals and precious metals. Sodium bisulphite is a primary inorganic chemical used extensively in water treatment, the paper industry, and as a reducing agent in textile dyeing. The classification is straightforward as long as the substance is not mixed with other chemicals in a way that would qualify it as a prepared chemical product under Chapter 38.

Products Included

• Sodium hydrogen sulphite (liquid or solid)
• Anhydrous sodium bisulphite
• Technical grade sodium bisulphite for water treatment
• Food grade sodium bisulphite (E222)
• Sodium bisulphite solution

Common Misclassification

A frequent point of confusion is between sodium bisulphite (2832.10) and sodium metabisulphite (2832.10) or sodium sulphate (2833.11). While sodium bisulphite and metabisulphite often share the same HS code in many jurisdictions because they are both sodium sulphites, they are chemically distinct. More critically, it is often misclassified under 2833.11 (Sodium sulphates), which are salts of sulphuric acid rather than sulfurous acid. Importers must verify the oxidation state of the sulfur to distinguish between 2832 and 2833.

FAQ

What is the HS code for sodium bisulphite?

The standard HS code for sodium bisulphite is 2832.10, which covers sulphites of sodium.

Can sodium bisulphite be classified under Chapter 38?

Only if it is part of a prepared mixture, such as a specialized photographic chemical or a complex water treatment blend. Pure sodium bisulphite must stay in 2832.10.