Calcined Diatomite Granules
Calcined diatomite granules, a siliceous fossil meal processed by heat treatment, used in cat litter and soil amendments. The product retains an apparent specific gravity of 1 or less, meeting the tariff item's requirement for calcined siliceous earths.
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 granules are mixed with other substances for a specific application
Mixtures with added binders or additives may fall under chemical products not covered by Chapter 25.
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 product's apparent specific gravity is 1 or less and provide a certificate of analysis to CBSA if requested
• Verify that any anti-dusting agents added do not make the product suitable for a specific use beyond general use
• Classify as a siliceous fossil meal, not as a prepared cat litter additive
Related Products under Tariff item 2512.00.00
Calcined Tripolite
Calcined tripolite, a heat-treated siliceous earth used as an extender in paints and coatings. Its apparent specific gravity remains at or below 1, qualifying it as a siliceous fossil meal under this tariff item.
Diatomaceous Earth for Agriculture
Natural ground diatomaceous earth for agricultural use as a pesticide dust. This unprocessed siliceous fossil meal has a low apparent specific gravity, fitting the tariff item's scope for crude or mechanically processed products.
Diatomaceous Earth Powder
Natural diatomite powder, a siliceous fossil meal from diatom skeletons, used as a filtration aid in food and beverage processing. With an apparent specific gravity under 1, it is directly covered by this tariff item as an unprocessed siliceous earth.
Diatomite Filtration Media
Powdered diatomite graded for pool and aquarium filtration, with an apparent density under 1. This siliceous fossil meal is classified here as a processed siliceous earth, provided it is not mixed with other filter media.
Kieselguhr Filter Aid
Calcined kieselguhr used as a filter aid in brewing and wine production, featuring high porosity and specific gravity under 1. This siliceous fossil meal is explicitly named in the tariff item and qualifies as calcined.
Kieselguhr Insulation Filler
Powdered kieselguhr for thermal insulation in construction, with ultra-low density under 1. As a siliceous fossil earth, it is covered by this tariff item when not mixed with binders or other materials.