Section V — Mineral products
Chapter 25 — Salt; sulfur; earths and stone; plastering materials, lime and cement
Heading
2512 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.
Common commodities
Diatomaceous earth for filtrationPorous silica from diatomsRaw kieselguhr for industrial useTripolite for ceramic applicationsFossil meal for purification processesMoler earth for filter aidsIndustrial grade diatomiteNatural diatomaceous earthUncalcined diatomite for filtrationSilica from diatoms (raw material)