Diatomaceous Earth Firebrick
A high-temperature resistant brick made from diatomaceous earth (kieselguhr), a siliceous fossil meal, shaped and fired for use in industrial furnaces and kilns. This product qualifies under tariff item 6901.00.00 as a ceramic good of siliceous fossil meals, which are explicitly included in the heading. The firing process meets the chapter's requirement for ceramic products.
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 |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the firebrick contains over 50% magnesia, lime, or chromium oxide
Heading 6902 covers refractory bricks and similar goods with specific chemical compositions, which may take precedence over siliceous fossil meal goods.
If the brick is not fired or contains non-ceramic binders
Articles of stone or other mineral substances not elsewhere specified may apply if the product does not meet the firing requirement of Chapter 69.
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 firebricks are fired after shaping to qualify under Chapter 69; unfired or resin-cured products are excluded
• Provide a detailed product description and composition certificate to CBSA to confirm the siliceous fossil meal content
• Verify if the goods require any additional permits for industrial use, such as workplace safety certifications
Related Products under Tariff item 6901.00.00
Diatomaceous Earth Kiln Shelf
A fired ceramic shelf made from diatomite for supporting pottery in kilns, valued for lightweight insulation. This product falls under tariff item 6901.00.00 as an 'other ceramic good' of siliceous fossil meals, since it is shaped and fired from diatomaceous earth. The heading explicitly includes such ceramic goods beyond bricks, blocks, and tiles.
Diatomite Pool Filter Block
A ceramic block composed of diatomaceous earth for use in swimming pool filtration systems, providing high porosity after firing. This product is classified under tariff item 6901.00.00 as an 'other ceramic good' of siliceous fossil meals, as it is shaped and fired from diatomite. The heading covers such goods regardless of their end-use application.
Diatomite Thermal Insulation Block
A high-porosity thermal insulation block from diatomaceous earth for ovens and high-heat enclosures. This product is specifically covered by tariff item 6901.00.00, which includes blocks of siliceous fossil meals. The block is shaped and fired, meeting the ceramic product requirements of Chapter 69.
Kieselguhr Catalyst Support Brick
A ceramic brick from kieselguhr used as inert support for chemical catalysts in reactors. This product falls under tariff item 6901.00.00 as a ceramic good of siliceous fossil meals, specifically kieselguhr. The brick is shaped and fired, meeting the requirements for ceramic products in Chapter 69.
Kieselguhr Insulating Brick
An insulating ceramic brick produced from kieselguhr (diatomite), offering excellent thermal resistance for boiler linings and high-heat applications. This product is classified under tariff item 6901.00.00 due to its composition from siliceous fossil meals. The brick is shaped and fired, meeting the ceramic product definition in Chapter 69.
Kieselguhr Roofing Tile
A lightweight roofing tile manufactured from kieselguhr for thermal insulation in construction. Tariff item 6901.00.00 includes tiles of siliceous fossil meals, distinct from common clay tiles. The tile is shaped and fired, meeting the ceramic product requirements of Chapter 69.