Boron Trioxide (Boric Oxide)
Boron trioxide (B₂O₃) is a pure inorganic oxygen compound of the non-metal boron, used in glass manufacturing and as a flux. This chemically defined compound is classified under Chapter 28 as an 'other' inorganic oxygen compound of non-metals. The product is available as a white powder or glassy solid.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is boric acid rather than boron trioxide
Boric acid is classified under heading 28.10 as a separate inorganic acid.
If the product is a borate salt
Borate salts are classified under heading 28.40.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the boron trioxide is not classified as boric acid, which has a separate tariff heading
• Provide the CBSA with the purity certificate and intended use documentation
• Verify that the product is not used in food applications without proper approvals
Related Products under Tariff item 2811.29.00
ACS Reagent Selenium Dioxide
ACS reagent grade selenium dioxide for high-precision analytical and research applications. It is a pure, chemically defined inorganic oxygen compound of the non-metal selenium, meeting Chapter 28 note 1 requirements.
Anhydrous Sulfur Dioxide for Wine Preservation
High-purity anhydrous sulfur dioxide gas used in winemaking to prevent oxidation and microbial growth. This chemically defined inorganic oxygen compound of sulfur meets the Chapter 28 criteria for separate chemical compounds, whether or not containing impurities. Supplied in pressurized containers for direct use in wine preservation.
Antimony Trioxide
Antimony trioxide (Sb₂O₃) used as a flame retardant in plastics and a catalyst in PET production. This fine white powder is an inorganic oxygen compound of the non-metal antimony, classified under Chapter 28. The product is a chemically defined compound in its pure form.
Arsenic Trioxide
Arsenic trioxide (As₂O₃), a white powder used in pharmaceuticals and glass production, is an inorganic oxygen compound of the non-metal arsenic. This chemically defined compound falls under Chapter 28 as an 'other' inorganic oxygen compound of non-metals. The product is supplied in pure form for various industrial applications.
Arsenic Trioxide Anhydrous Powder
Arsenic trioxide (As2O3) in anhydrous powder form, a white crystalline inorganic compound. It is a chemically defined inorganic oxygen compound of the non-metal arsenic, used primarily in industrial applications such as glass production and metallurgy.
Arsenic Trioxide Flake Form
Arsenic trioxide in dense flake form, used for easier handling in metallurgy and glass decolorizing processes. It is a chemically defined inorganic oxygen compound of the non-metal arsenic, falling under this tariff item.