U.S. imports of Fluorspar (≤97% Calcium Fluoride) (HS 252921) totaled $272K in August 2026, imported from 8 countries.
Fluorspar (≤97% Calcium Fluoride) imports of $272K in August 2026 ran 55% below the year-to-date monthly average of $609K.
Last updated: August 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.
39 import shipments a month
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.
Subheading 4 of 4 in heading 2529
Subheading 252921 · $272K of $26.6M
Trade Directory
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ImportsExports
Imports
$272KYoY · free account
Exports
$49KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $8.3M of Fluorspar (≤97% Calcium Fluoride) and exported $2.1M.
Fewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through August 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share |
|---|---|---|---|---|
| 2529210000 | Fluorspar Contng by Wt Lt=97% Calcium Fluoride | $272K | 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 | $49K |
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.
Imports · August 2026
origin
Mexico and China together supply 93% of it.
customs district
destination
entry
rate provision · imports
100.0% enters free of duty; duty collected equals 0.00% of imports for consumption.