HS Code for Boron oxide

Boron oxide, primarily known as diboron trioxide (B2O3), is classified under HS code 2810.00. This heading is specifically reserved for oxides of boron and boric acids. In the hierarchy of the Harmonized System, Chapter 28 deals with inorganic chemicals, and heading 2810 is a unique category that groups boron oxides and various forms of boric acid together at the six-digit level. Boron oxide is a critical raw material in the production of glass, ceramics, and enamels, where it acts as a fluxing agent to lower melting temperatures. The classification is straightforward because the heading text explicitly names the substance. It covers the oxide in its anhydrous form, typically appearing as a glassy solid or white powder. The classification remains consistent regardless of the purity level, provided the product is not a mixture or a prepared compound that would move it to a different chapter.

Products Included

• Diboron trioxide (B2O3)
• Boric anhydride
• Vitreous boron oxide
• Orthoboric acid
• Metaboric acid

Common Misclassification

Boron oxide is often confused with borates, such as disodium tetraborate (borax), which are classified under heading 2840. While they both contain boron, borates are salts of boric acid, whereas 2810.00 is strictly for the oxides and the acids themselves. Another misclassification occurs with natural crude borates, which belong in Chapter 25 under HS code 2528.00. Importers must distinguish between the chemically pure oxide (2810.00) and the naturally occurring mineral ores.

FAQ

What is the HS code for boron oxide?

The HS code for boron oxide is 2810.00, which also includes boric acids.

Does this code include borax?

No, borax is a borate and is classified under HS code 2840.11 or 2840.19, depending on its hydration state.