Tripolite Diatomite
Tripolite, a lightweight siliceous fossil meal similar to diatomite, used in absorbents and fillers, with apparent specific gravity ≤1. It qualifies under HTS 2512.00.00.00 as an uncalcined siliceous earth.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If considered mineral substances nesoi
Other unlisted earths like chlorites go to 2530, but fossil specificity keeps it in 2512.
If clay-like in processing
Clays and similar earths of heading 2508 if not distinctly fossil siliceous meals.
If built-up into agglomerated mica forms
Agglomerated products from splittings become worked articles in 6815.
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Import Tips & Compliance
• Obtain supplier specs confirming fossil origin and density; label as non-hazardous for transport; prevent confusion with synthetic silicas
Related Products under HTS 2512.00.00.00
Diatomaceous Earth Powder
Natural diatomite, a siliceous fossil meal derived from diatom skeletons, with an apparent specific gravity of less than 1. It is used as a filtration aid in food and beverage processing. Classified under HTS 2512.00.00.00 due to its low density and siliceous fossil origin, whether calcined or not.
Kieselguhr Filter Aid
Calcined kieselguhr (diatomite) used as a filter aid in brewing and wine production, featuring high porosity and specific gravity under 1. This siliceous earth meets HTS 2512.00.00.00 criteria as a fossil meal.
Calcined Diatomite Granules
Granular calcined diatomite for use in cat litter and soil amendments, maintaining specific gravity of 1 or less. This product is explicitly covered by HTS 2512.00.00.00 as a processed siliceous fossil meal.
Natural Kieselguhr Powder
Uncalcined kieselguhr powder from fossil deposits, ideal for insecticide carriers due to its porous structure and low specific gravity. Fits HTS 2512.00.00.00 as a raw siliceous earth.
Diatomite Filtration Media
Powdered diatomite specifically graded for pool and aquarium filtration, with apparent density under 1. Classified in HTS 2512.00.00.00 for its siliceous fossil meal properties.
Siliceous Earth Absorbent
Low-density siliceous fossil earth (diatomite-based) for oil spill cleanup and industrial absorbents. Meets HTS 2512.00.00.00 due to gravity and fossil composition.