HS Code for Potassium alum

Potassium alum, also known as potassium aluminum sulfate, is classified under HS code 2833.30. This code is situated within Chapter 28, which encompasses inorganic chemicals, precious metals, and rare-earth metals. Specifically, heading 2833 covers sulfates, alums, and peroxosulfates. Potassium alum is a double sulfate of potassium and aluminum, typically found in its hydrated form. The classification is straightforward under GRI 1, as the heading explicitly mentions "Alums." Unlike simple sulfates, alums are complex salts that crystallize in a specific octahedral structure. For customs purposes, the product must meet the chemical definition of an alum to qualify for 2833.30, regardless of whether it is in the form of large crystals, powder, or granulated chunks. It is widely used in water purification, leather tanning, and as an astringent in cosmetic applications.

Products Included

• Potassium aluminum sulfate dodecahydrate
• Potash alum in crystalline form
• Granulated potassium alum for industrial water treatment
• Technical grade potassium alum powder

Common Misclassification

A frequent misclassification occurs with HS code 2833.22, which is dedicated to aluminum sulfate. While potassium alum contains aluminum sulfate as part of its double salt structure, the presence of the alkali metal (potassium) and its crystalline nature as an alum requires the use of 2833.30. Additionally, when potassium alum is shaped into specific forms for use as a deodorant or aftershave (such as "crystal" deodorant sticks), it may be misclassified under 3307.90 (other perfumery or cosmetic preparations). However, if it is simply the bulk chemical, 2833.30 remains the correct code.

FAQ

What is the HS code for Potassium alum?

The HS code for Potassium alum is 2833.30, which covers all types of alums.

Does the purity of the alum affect its HS code?

Generally, no. Whether it is technical grade or pharmaceutical grade, as long as it remains a separate chemically defined inorganic compound, it stays under 2833.30. However, if it is mixed with other ingredients for a specific retail use, the classification might shift to Chapter 33 or 38.