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HSChapter 25
U.S. imports of natural borates & concentrates; natural boric acid (HS 252800) totaled $896K in July 2026, traded with 10 countries.
Importers of Natural Borates & Concentrates; Natural Boric Acid paid $63K in duties in July 2026 — an effective duty rate of 10% on $627K in dutiable value, based on actual customs collections rather than the published tariff schedule. Natural Borates & Concentrates; Natural Boric Acid imports of $896K in July 2026 ran 52% below the year-to-date monthly average of $1.9M.
Last updated: July 2026 dataTurkey dominates global supply of natural borates — a position reflected in US import flows under this heading — with Bolivia and Peru serving as secondary Western Hemisphere sources. The heading spans five 10-digit tariff lines distinguishing sodium borates (calcined and uncalcined), calcium borates, and other natural borates and boric acid (NESOI), making precise chemical identification critical at entry. Borates are strategic inputs for glass fiber, ceramics, agriculture, and nuclear applications, and importers should confirm whether their specific product is calcined or not, as that distinction drives line-level classification.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
12 shipments/mo
The US schedule separates natural sodium borates and their concentrates that have not been calcined (2528000005 / 2528001000) from those that have undergone calcination. Calcination changes the chemical structure and water content of the mineral, so importers must confirm the thermal processing history of their product with the supplier and document it on the commercial invoice to support correct line-level classification.
Turkey holds the world's largest known reserves of borate minerals, giving Turkish producers a structural cost and volume advantage. This concentration means US importers of natural borates face meaningful single-country supply risk; disruptions in Turkish export policy or logistics can have outsized effects on availability and pricing.
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Subheading 1 of 1 in heading 2528
Subheading 252800 · $896K of $896K
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 | Duty Collected |
|---|---|---|---|---|---|
| 2528000005 | Natural Sodium Borates & Concentrates Thereof | $475K | 6.82% | 68.16% | $32K |
| 2528000050 | Natural Borates & Natural Boric Acid, NESOI | $305K | 6.15% | 61.52% | $19K |
| 2528000010 | Natural Calcium Borates | $116K | 10.00% | 100.00% | $12K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2528009000 | Natural Borates and Natural Boric Acid NESOI | $140K |
| 2528001000 | Natural Sodium Borates & Concentrates W/T Calcined | $91K |
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 · July 2026
origin
Turkey and Bolivia together supply 92% of it.
customs district
destination
entry
rate provision · imports
30.0% enters free of duty; the effective duty rate is 7.00%.
ImportsExports
Imports
$896KYoY · Pro
Exports
$231KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.