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HSChapter 25
U.S. imports of natural borates & concentrates; natural boric acid (HS 252800) totaled $1.5M in April 2026, traded with 10 countries.
Importers of Natural Borates & Concentrates; Natural Boric Acid paid $151K in duties in April 2026 — an effective duty rate of 10% on $1.5M in dutiable value, based on actual customs collections rather than the published tariff schedule. Natural Borates & Concentrates; Natural Boric Acid imports of $1.5M in April 2026 ran 28% below the year-to-date monthly average of $2.1M.
Last updated: April 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.
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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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2528000050 | NATURAL BORATES & NATURAL BORIC ACID, NESOI | $959K | 10.00% | $95K |
| 2528000005 | NATURAL SODIUM BORATES & CONCENTRATES THEREOF | $527K | 10.00% | $53K |
| 2528000010 | NATURAL CALCIUM BORATES | $38K | 10.00% | $4K |
NATURAL BORATES & NATURAL BORIC ACID, NESOI
NATURAL SODIUM BORATES & CONCENTRATES THEREOF
NATURAL CALCIUM BORATES
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2528001000 | NATURAL SODIUM BORATES & CONCENTRATES W/T CALCINED | $224K |
| 2528009000 | NATURAL BORATES AND NATURAL BORIC ACID NESOI | $218K |
NATURAL SODIUM BORATES & CONCENTRATES W/T CALCINED
120.0K kg
NATURAL BORATES AND NATURAL BORIC ACID NESOI
83.1K kg
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
| State | Imports | Exports | Balance |
|---|---|---|---|
| Georgia | $1.1M | -- | -$1.1M |
| Virginia | $363K | $40K | -$322K |
| Washington | -- | $127K | +$127K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| SAVANNAH, GA | $1.1M | -- | -$1.1M |
| NORFOLK-NEWPORT NEWS, VA | $363K | -- | -$363K |
| EASTPORT, ID | -- | $144K | +$144K |