HS Code for Borax pentahydrate

Borax pentahydrate is classified under HS code 2840.19. Similar to the decahydrate form, the pentahydrate version contains water of crystallization—specifically five molecules (Na2B4O7·5H2O). Because it is a hydrated form of refined disodium tetraborate, it cannot be classified under the anhydrous code (2840.11) and is instead placed in the "other" category of 2840.19. The pentahydrate form is often preferred in industrial settings over the decahydrate because it has a higher boron content per unit of weight and is less prone to caking during storage. The classification remains consistent across most international customs jurisdictions due to the specific chemical definitions provided in the Chapter 28 notes of the HS nomenclature. It is used extensively in agriculture as a micronutrient fertilizer and in the manufacture of fiberglass and heat-resistant glass.

Products Included

• Sodium tetraborate pentahydrate
• Refined borax 5-mol
• Etibor-48 or similar trade-named pentahydrates
• Granular borax pentahydrate

Common Misclassification

Borax pentahydrate is often misclassified under 2840.11 by importers who assume all industrial borax is anhydrous. However, the presence of five water molecules requires it to be in 2840.19. It is also sometimes confused with 2840.20, which covers "other borates" such as calcium borates or zinc borates. Since it is a disodium tetraborate, it must stay within the 2840.1X subheadings. Furthermore, if the product is intended for use as a fertilizer and is packaged for retail sale or contains specific additives, it might be argued into Chapter 31 (Fertilizers), though 2840.19 remains the standard for the pure chemical.

FAQ

What is the HS code for borax pentahydrate?

The HS code for refined borax pentahydrate is 2840.19.

How does it differ from 2840.11?

HS code 2840.11 is for anhydrous borax (no water), while 2840.19 includes all hydrated forms, including pentahydrate (5 water molecules) and decahydrate (10 water molecules).