HS Code for Alumina hydrate

Alumina hydrate, scientifically referred to as aluminium hydroxide, is classified under HS code 281830. This classification is situated within Chapter 28 of the Harmonized System, which encompasses inorganic chemicals and compounds of precious metals. The specific heading 2818 is divided into subheadings: 281820 for aluminium oxide and 281830 for aluminium hydroxide. The classification of alumina hydrate is determined by its chemical composition, specifically the presence of hydroxyl groups bonded to aluminium, which distinguishes it from the anhydrous oxide form. According to the General Rules for the Interpretation (GRI) of the Harmonized System, products are classified based on the terms of the headings and any relative section or chapter notes. For alumina hydrate, Chapter Note 1 to Chapter 28 is particularly relevant, as it specifies that the headings of this chapter apply only to separate chemically defined compounds. Alumina hydrate is typically produced via the Bayer process and is used extensively as a flame retardant in polymers and a feedstock for the production of aluminium fluoride. The classification remains 281830 regardless of whether the product is in powder or slurry form, provided it maintains its chemical identity. The presence of the hydroxide group is the defining characteristic that separates it from artificial corundum (281810) and aluminium oxide (281820).

Products Included

• Aluminium hydroxide powder
• Alumina trihydrate (ATH)
• Gibbsite
• Bayerite
• Amorphous aluminium hydroxide

Common Misclassification

Alumina hydrate is frequently confused with aluminium oxide, which falls under HS code 281820. The primary difference is the presence of chemically bound water in the hydrate. It is also sometimes misclassified as bauxite ore under HS code 260600; however, bauxite is a raw mineral, whereas alumina hydrate is a refined chemical product.

FAQ

What is the HS code for Alumina hydrate?

The HS code for Alumina hydrate (aluminium hydroxide) is 281830.

Is alumina hydrate the same as bauxite for customs purposes?

No, bauxite is the raw ore classified under 260600, while alumina hydrate is a processed inorganic chemical classified under 281830.