Florisil Magnesium Silicate Decolorizer
Synthetic magnesium silicate adsorbent similar to natural decolorizing earths, used in pharmaceutical purification and analytical chemistry for removing impurities. Classified under HTS 2508.40.0120 when presented as decolorizing earth equivalent, despite synthetic origin matching natural performance specs. Fine powder form optimized for column chromatography.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If chemically pure magnesium silicate
Pure synthetic silicates classified as metal salts in Chapter 28, not mineral earths.
If for laboratory reagents or diagnostic kits
Lab-grade reagents often fall under diagnostic or lab prep headings.
If refractory grade for high-temp applications
Refractory bricks and shapes of silicates go to Chapter 69.
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Import Tips & Compliance
• Include material safety data sheets confirming non-hazardous mineral composition
• Validate batch-specific adsorption capacity via iodine number tests
• Avoid steel drums that may contaminate with iron affecting performance
Related Products under HTS 2508.40.01.20
Activated Attapulgite Decolorizing Earth
Finely ground attapulgite clay activated for maximum adsorption capacity, used primarily in oil refining to remove color impurities and contaminants from petroleum products. Classified under HTS 2508.40.0120 as decolorizing earth due to its high surface area and selective adsorption properties for organic compounds. Not calcined or expanded, distinguishing it from clays in other headings.
Fuller's Earth Bleaching Clay
Bentonite-based fuller's earth processed for use in edible oil refining, effectively removing color bodies, soaps, and gums through adsorption. Falls under HTS 2508.40.0120 as fuller's earth, a natural clay with high montmorillonite content valued for its bleaching action. Supplied in powdered form without further chemical modification.
Bentonite Fuller's Earth for Cosmetics
High-purity fuller's earth derived from bentonite deposits, used in facial masks and oil-absorbing cosmetics for its natural clarifying properties. HTS 2508.40.0120 classification as fuller's earth based on adsorptive mineral structure, excluding cosmetic preparations of Chapter 33. Milled to fine particle size for skincare formulations.
Diatomaceous Earth Decolorizing Grade
Calcined diatomite selected for decolorizing applications in sugar refining and beverage processing, acting as a filter aid with adsorptive properties. While primarily siliceous, classified under HTS 2508.40.0120 when specifically for decolorizing rather than pure filtration. Distinguished from expanded forms in 6806.
Zeolite Decolorizing Earth
Natural zeolite powder with crystalline aluminosilicate structure used for decolorization in wastewater treatment and edible oil processing. HTS 2508.40.0120 applies to its role as decolorizing earth based on adsorptive function, not molecular sieve applications. Supplied as micronized powder for optimal contact efficiency.
Sepiolite Fuller's Earth
Fibrous clay mineral sepiolite processed as fuller's earth for cat litter decolorization and industrial absorbents. High porosity and adsorption make it ideal for oil spill cleanup and purification. Classified HTS 2508.40.0120 as fuller's earth, distinct from meerschaum in 2530.