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HSChapter 25
U.S. imports of fluorspar (≤97% calcium fluoride) (HS 252921) totaled $849K in April 2026, traded with 7 countries.
Fluorspar (≤97% Calcium Fluoride) imports of $849K in April 2026 ran 52% above the year-to-date monthly average of $557K.
Last updated: April 2026 dataAcid-grade and metallurgical-grade fluorspar containing 97% or less calcium fluoride by weight — classified under 2529210000 — is a critical mineral input for aluminum smelting, steel fluxing, and hydrofluoric acid production. China is the dominant global producer and the leading US supplier under this grade, and imports from China are subject to Section 301 tariffs, a significant cost consideration for downstream fluorochemical and aluminum producers. Mexico provides an alternative USMCA-eligible source, though its export volumes are more limited at this purity tier.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
The dividing line is 97% calcium fluoride (CaF₂) content by weight. Material at or below 97% CaF₂ falls under 252921 and is typically used as metallurgical-grade flux or as a feedstock for hydrofluoric acid production after further processing. Material exceeding 97% CaF₂ is classified under 252922 and is generally considered acid-grade or ceramic-grade fluorspar. A certified chemical analysis from the supplier is essential to support the correct classification.
Yes. The US government has designated fluorspar as a critical mineral due to its essential role in fluorochemicals, aluminum production, and defense applications, combined with heavy import dependence. This designation has prompted supply-chain diversification efforts, but China's structural dominance in production means Section 301 exposure remains a live cost factor for most US importers.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % |
|---|---|---|---|
| 2529210000 | FLUORSPAR CONTNG BY WT LT=97% CALCIUM FLUORIDE | $849K | -- |
FLUORSPAR CONTNG BY WT LT=97% CALCIUM FLUORIDE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2529210000 | FLUORSPAR CONTNG BY WT LT=97% CALCIUM FLUORIDE | $518K |
FLUORSPAR CONTNG BY WT LT=97% CALCIUM FLUORIDE
886 t
PORTLAND CEMENT EXCEPT WHITE PORTLAND CEMENT
HS 252329
SULFUR OF ALL KINDS, NOT SUBLIMED,PRECIP,COLLOIDAL
HS 250300
SALT INCL TBL/DENTRD, PURE SODM CHLOR ETC; SEA WTR
HS 250100
UNGRND NAT CAL PHSPH, ALUM CAL PHOS A PHOS CHALK
HS 251010
FLUORSPAR OV 97% OF CALCIUM FLUORD BY WGHT
HS 252922
PEBBLES, GRAVEL ETC. FOR CONCRETE AGGREGATES ETC.
HS 251710
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEW ORLEANS, LA | $540K | -- | -$540K |
| CHAMPLAIN-ROUSES POINT, NY | -- | $384K | +$384K |
| EAGLE PASS, TX | $143K | -- | -$143K |