Tripolite Ceramic Block
A heavy-duty ceramic block made from tripolite, a siliceous fossil earth similar to diatomite, used in furnace construction. Tariff item 6901.00.00 covers such goods explicitly, including 'similar siliceous earths' that are shaped and fired. The block meets the ceramic product definition in Chapter 69.
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 block contains over 50% magnesia, lime, or chromium oxide
Refractory blocks with specific chemical compositions may be classified under heading 6902.
If the block is designed for high-temperature refractory use
Other refractory ceramic goods may be classified under heading 6903.
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 block is fired at temperatures above 800°C to qualify as a ceramic product under Chapter 69
• Provide CBSA with a technical datasheet showing the tripolite content and firing conditions
• Check if the block is considered a refractory product, which may require additional classification review
Related Products under Tariff item 6901.00.00
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.
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.