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HSChapter 25
U.S. imports of fluorspar (>97% calcium fluoride) (HS 252922) totaled $20.4M in April 2026, traded with 9 countries.
Fluorspar (>97% Calcium Fluoride) imports of $20.4M in April 2026 ran 36% above the year-to-date monthly average of $15.0M.
Last updated: April 2026 dataHigh-purity fluorspar exceeding 97% calcium fluoride by weight — classified under 2529220000 — is the preferred feedstock for hydrofluoric acid synthesis and specialty ceramic applications where lower-grade material is unsuitable. Mexico is the leading supplier to the US at this purity tier, and imports from Mexico meeting USMCA rules of origin qualify for preferential duty treatment. South Africa and Mongolia are secondary sources, providing geographic diversification for buyers concerned about single-country concentration.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Customs brokers recommend including a third-party or supplier-issued certificate of analysis (CoA) showing CaF₂ content exceeding 97% by weight, along with silica, sulfur, and carbonate impurity levels. CBP may request this documentation to verify the correct subheading, particularly when the invoice description is ambiguous between acid-grade and metallurgical-grade material.
Hydrofluoric acid (HF) is produced by reacting fluorspar with sulfuric acid. Acid-grade fluorspar (>97% CaF₂) is required because impurities — especially silica and sulfur — degrade HF yield and create processing complications. Metallurgical-grade material (≤97% CaF₂) is generally not suitable for direct HF production without additional beneficiation, which is why the two purity tiers carry separate HTS classifications and often trade at different price points.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| MEXICO | $14.7M | -- | -$14.7M |
| MONGOLIA | $4.8M | -- | -$4.8M |
| SOUTH AFRICA | $447K | -- | -$447K |
| CHINA | $390K | -- | -$390K |
| CANADA | -- | $140K | +$140K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2529220000 | FLUORSPAR CONTNG BY WT GT 97% CALCIUM FLUORIDE | $20.4M | 10.00% | $819 |
FLUORSPAR CONTNG BY WT GT 97% CALCIUM FLUORIDE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2529220000 | FLUORSPAR CONTNG BY WT GT 97% CALCIUM FLUORIDE | $140K |
FLUORSPAR CONTNG BY WT GT 97% CALCIUM FLUORIDE
300 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
PEBBLES, GRAVEL ETC. FOR CONCRETE AGGREGATES ETC.
HS 251710
WHITE PORTLAND CEMENT WHTHR OR NT ART COLORED
HS 252321
| State | Imports | Exports | Balance |
|---|---|---|---|
| Louisiana | $10.8M | -- | -$10.8M |
| Texas | $9.1M | -- | -$9.1M |
| California | $161K | -- | -$161K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| HOUSTON, TX | $9.1M | -- | -$9.1M |
| BATON ROUGE, LA | $7.6M | -- | -$7.6M |
| NEW ORLEANS, LA | $3.2M | -- | -$3.2M |