U.S. imports of siliceous fossil meals & earths (diatomite, kieselguhr, tripolite) (HS 251200) totaled $1.2M in April 2026, traded with 12 countries.
Classified under a single 10-digit line (2512000000), diatomite and related siliceous fossil meals are distinguished by their unusually low apparent specific gravity of 1 or less — a physical property that drives their use as filtration media, functional fillers, and mild abrasives across food processing, brewing, and industrial applications. Canada and Mexico are the leading US import sources, with Germany, Japan, and India also contributing meaningfully to supply. Importers should note that calcined versus flux-calcined grades carry different performance profiles and may affect classification decisions at the 10-digit level.
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The defining criterion is an apparent specific gravity of 1 or less. Within that threshold, kieselguhr, tripolite, and diatomite are all captured under the same heading; calcination level and particle size differentiate commercial grades but do not create separate HTS lines at the 6-digit level.
Canada and Mexico are the top suppliers, followed by Germany, Japan, and India. The geographic spread reflects both proximity advantages and the presence of major global diatomite producers in Europe and Asia.
Supplier Network
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Exports
$6.3M
Imports
$1.2M
from 12 countries · YTD: $3.4M
Surplus of $5.1M (net exporter)
Trade balance: surplus of $5.1M (net exporter)
YTD: $3.4M imported (April 2026)
157 shipments/month
Monthly import values over time
SALT INCL TBL/DENTRD, PURE SODM CHLOR ETC; SEA WTR
HS 250100
PORTLAND CEMENT EXCEPT WHITE PORTLAND CEMENT
HS 252329
SULFUR OF ALL KINDS, NOT SUBLIMED,PRECIP,COLLOIDAL
HS 250300
NATURAL BARIUM SULFATE (BARYTES)
HS 251110
FLUORSPAR OV 97% OF CALCIUM FLUORD BY WGHT
HS 252922
UNGRND NAT CAL PHSPH, ALUM CAL PHOS A PHOS CHALK
HS 251010
Top U.S. entry points for this product, ranked by latest-month import value.