Florisil Magnesium Silicate Decolorizer
Synthetic magnesium silicate adsorbent similar to natural decolorizing earths, used in pharmaceutical purification and analytical chemistry for removing impurities. It is classified under tariff item 2508.40.00 when presented as a decolorizing earth, despite its synthetic origin, due to its functional equivalence.
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 product is a pure chemical compound
Synthetic magnesium silicate is classified as an inorganic chemical.
If the product is a prepared additive
Prepared chemical products not elsewhere specified may apply.
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
• Confirm whether the product is synthetic; if so, it may be classified under Chapter 28 as an inorganic chemical
• Provide detailed technical data on the product's composition and intended use
• Consult a customs broker if the synthetic nature creates classification ambiguity
Related Products under Tariff item 2508.40.00
Activated Attapulgite Decolorizing Earth
Activated attapulgite clay, finely ground and treated to maximize its adsorption capacity, is used primarily in oil refining to strip color impurities and contaminants from petroleum products. It qualifies under tariff item 2508.40.00 as an 'other clay' that has undergone only mechanical or physical processing, not chemical alteration beyond activation.
Attapulgite Clay Granules
Granular attapulgite clay in its natural, non-expanded state, used as a suspension agent in pesticides and drilling fluids. It is a natural clay that has not been subjected to processing beyond crushing or grinding, aligning with the scope of heading 25.08.
Attapulgite Drilling Grade Clay
Fibrous attapulgite clay optimized for oil well drilling fluids, providing suspension properties. It is classified under tariff item 2508.40.00 as an 'other clay' in powdered or granular form for industrial use, not calcined or expanded.
Ball Clay for Ceramics
High-plasticity ball clay mined for use in fine porcelain and sanitaryware production. As a natural, unexpanded clay, it falls under 'other clays' in heading 25.08, not being a kaolin or fire clay.
Bentonite Clay Lumps
Natural bentonite clay in lump form, valued for its swelling properties in drilling muds, cat litter, and sealants. It is a natural clay that has not been expanded or processed beyond mechanical means, fitting the scope of 'other clays'.
Bentonite Clay Swellable Grade
Sodium montmorillonite bentonite clay with high swelling capacity, used in drilling muds and sealants. Tariff item 2508.40.00 covers this as an 'other clay', unexpanded and suitable for industrial applications like oilfield services.