Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less
Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified 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.
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.
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.
Calcined Tripolite
Heat-treated tripolite, a diatomaceous siliceous earth, for use in paints and coatings as an extender. Retains specific gravity ≤1, classifying under HTS 2512.00.00.00.
Diatomaceous Earth for Agriculture
Natural ground diatomite used as a natural pesticide dust in organic farming, low specific gravity fossil meal. HTS 2512.00.00.00 applies to this unprocessed form.
Kieselguhr Insulation Filler
Powdered kieselguhr for thermal insulation in construction, featuring ultra-low density under 1. As a siliceous fossil earth, it is covered by HTS 2512.00.00.00.