HS Code for Glauber's salt

Glauber's salt, the decahydrate form of disodium sulphate (Na2SO4·10H2O), is classified under HS code 2833.11. This classification falls within Chapter 28, which covers inorganic chemicals and compounds of precious metals. Heading 2833 is designated for sulphates, alums, and peroxosulphates. Subheading 2833.11 specifically identifies disodium sulphate. The classification is based on the chemical identity of the substance as a salt of sulphuric acid. Glauber's salt is a common commercial form of sodium sulphate, appearing as large, colorless crystals that are highly soluble in water. It is widely used in the textile industry for dyeing, in the manufacture of detergents, and in the Kraft process of wood pulp manufacture. Because it is a chemically defined compound, it must be classified in Chapter 28 regardless of whether it is in its anhydrous form or its hydrated form (Glauber's salt). The Harmonized System groups these together under 2833.11 because they share the same base chemical structure of disodium sulphate, differing only in the presence of water of crystallization.

Products Included

• Glauber's salt (Sodium sulphate decahydrate)
• Anhydrous sodium sulphate
• Crystallized disodium sulphate
• Salt cake (crude sodium sulphate)
• Mirabilite (when refined as a chemical product)

Common Misclassification

Glauber's salt is sometimes misclassified under 2501.00 if it is confused with common table salt (sodium chloride). It may also be confused with 2833.19, which covers other sodium sulphates such as sodium hydrogen sulphate (sodium bisulphate). Another common error is attempting to classify it under 3104 if it is intended for use as a fertilizer, but as a pure chemical sulphate, 2833.11 remains the correct and more specific code.

FAQ

What is the HS code for Glauber's salt?

The HS code for Glauber's salt, which is chemically disodium sulphate, is 2833.11.

Is anhydrous sodium sulphate classified differently than Glauber's salt?

No, both the anhydrous form and the hydrated form (Glauber's salt) are classified under the same HS code, 2833.11, as they are both forms of disodium sulphate.