HS Code for Borax anhydrous

Borax anhydrous is classified under HS code 2840.11. This code is part of Chapter 28, which encompasses inorganic chemicals and precious metal compounds. Specifically, heading 2840 covers borates and peroxoborates. The subheading 2840.11 is dedicated to disodium tetraborate (refined borax) that has been processed to remove all water of crystallization. This dehydration process distinguishes it from other forms of borax. To qualify for this code, the product must be a refined chemical compound rather than a crude mineral. The anhydrous form is highly valued in industrial applications such as glass manufacturing, ceramics, and metallurgy because it does not release water vapor when heated, ensuring a more stable chemical reaction and reducing energy consumption during melting processes. The classification is strictly based on the chemical purity and the absence of water molecules in the crystal lattice.

Products Included

• Dehydrated disodium tetraborate
• Calcined refined borax
• Anhydrous sodium borate powder
• Fused borax for metallurgical flux

Common Misclassification

A common point of confusion is between HS code 2840.11 and HS code 2528.00. Code 2528 covers natural borates and concentrates thereof, whether or not calcined. If the borax is a crude mineral product that has only been minimally processed (e.g., by evaporation or heat to remove water), it belongs in Chapter 25. However, if it has been chemically refined to a high degree of purity, it must be classified in Chapter 28 under 2840.11. Another error is misclassifying it under 2840.19, which is reserved for hydrated forms. Importers must verify the water content; if the product is truly anhydrous (zero water of crystallization), 2840.11 is the only correct choice.

FAQ

What is the HS code for anhydrous borax?

The HS code for refined anhydrous borax (disodium tetraborate) is 2840.11.

What is the difference between 2840.11 and 2528.00?

HS code 2840.11 is for chemically refined borax, whereas 2528.00 is for natural, crude borates that have not undergone significant chemical processing beyond concentration or basic calcination.