HS 251200 · CONSTRUCTION MATERIALS

Diatomite and kieselguhr in East Africa

Light siliceous fossil earth used as a filter aid and filler; bought by breweries, sugar refiners and chemical plants.

Customs description: Siliceous fossil meals (e.g. kieselguhr, tripolite and diatomite) and similar siliceous earths; whether or not calcined, of an apparent specific gravity of 1 or less