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U.S. imports of fluorspar (≤97% calcium fluoride) (HS 252921) totaled $167K in July 2026, traded with 7 countries.
Fluorspar (≤97% Calcium Fluoride) imports of $167K in July 2026 ran 75% below the year-to-date monthly average of $657K.
Last updated: July 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.
27 shipments/mo
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.
HSChapter 25
Subheading 4 of 4 in heading 2529
Subheading 252921 · $167K of $36.5M
Supplier Network
Get discovered by U.S. importers searching for HS 252921 — Fluorspar (≤97% Calcium Fluoride). Be the first supplier listed.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share |
|---|---|---|---|---|
| 2529210000 | Fluorspar Contng by Wt Lt=97% Calcium Fluoride | $167K | 0.00% | 0.00% |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2529210000 | Fluorspar Contng by Wt Lt=97% Calcium Fluoride | $184K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$167KYoY · Pro
Exports
$184KYoY · Pro
12-mo low · imports
YoY · ProFewer than 6 of the last 12 months reported trade above $500K; the trend chart is not shown for thin series.
Through July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Mexico and China together supply 100% of it.
customs district
destination
entry
rate provision · imports
100.0% enters free of duty; the effective duty rate is 0.00%.