HS 251010

Unground Natural Calcium Phosphates, Natural Aluminum Calcium Phosphates & Phosphatic Chalk

U.S. imports of unground natural calcium phosphates, natural aluminum calcium phosphates & phosphatic chalk (HS 251010) totaled $20.7M in April 2026, traded with 2 countries.

Last updated: April 2026 data

Unground natural calcium phosphates and aluminum calcium phosphates are primary feedstocks for phosphate fertilizer production and animal feed supplements, entering the US under a single tariff line (2510100000) that specifically covers material in its unground, run-of-mine state. The unground designation is commercially significant because it distinguishes this heading from the ground form (heading 251020), which commands different pricing and end-use applications. Peru and Canada are the leading suppliers of unground phosphate rock to the US market.

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Imports

$20.7M

from 2 countries · YTD: $99.2M

Exports: $18K

Deficit of $20.7M (net importer)

Trade balance: deficit of $20.7M (net importer)

YTD: $99.2M imported (April 2026)

12 shipments/month

Top Import Sources

View all

1PERU$20.7M
99.8%
2CANADA$32K
0.2%

View all 2 trading partners

Import Trend (12 months)

Monthly import values over time

Geographic Breakdown

SALT INCL TBL/DENTRD, PURE SODM CHLOR ETC; SEA WTR

HS 250100

$73.0M

PORTLAND CEMENT EXCEPT WHITE PORTLAND CEMENT

HS 252329

$64.5M

SULFUR OF ALL KINDS, NOT SUBLIMED,PRECIP,COLLOIDAL

HS 250300

$35.6M

NATURAL BARIUM SULFATE (BARYTES)

HS 251110

$26.0M

FLUORSPAR OV 97% OF CALCIUM FLUORD BY WGHT

HS 252922

$18.4M

FUSED MAGNESIA; DEAD-BURN MAGNESIA; MAGNESIA NESOI

HS 251990

$12.4M

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Frequently Asked Questions

Why does the ground versus unground distinction matter for classifying natural calcium phosphates?

Unground phosphate rock (251010) and ground phosphate (251020) are separate HS headings with distinct tariff treatment. The physical state at time of importation determines classification, so importers must confirm whether the material has been milled or otherwise reduced in particle size before export.

Which countries are the primary suppliers of unground natural calcium phosphates to the US?

Peru and Canada are the leading source countries for unground natural calcium phosphates imported into the US.