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U.S. exports of oxides of boron & boric acids (HS 281000) totaled $18.1M in July 2026.
Importers of Oxides of Boron & Boric Acids paid $751K in duties in July 2026 — an effective duty rate of 9.7% on $7.8M in dutiable value, based on actual customs collections rather than the published tariff schedule. Oxides of Boron & Boric Acids imports of $7.8M in July 2026 ran 52% above the year-to-date monthly average of $5.1M.
Last updated: July 2026 dataTurkey controls a substantial share of global boron mineral reserves, making it the dominant supplier of boron oxides and boric acid to the US market, with Peru and Italy as secondary sources. Boric acid and boron trioxide serve as key inputs in fiberglass insulation, borosilicate glass, ceramic glazes, and nuclear shielding materials — end uses that span construction, electronics, and energy sectors. All forms enter under a single tariff line (2810000000), simplifying classification, though importers should confirm product purity and form (anhydrous oxide vs. orthoboric acid) to meet downstream manufacturing specifications.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
34 shipments/mo
Both boron trioxide (B₂O₃) and boric acid (H₃BO₃, orthoboric acid) are classified under the single line 2810000000 — the heading covers all oxides of boron and boric acids without subdivision. Despite sharing a tariff line, the two are chemically distinct: boron trioxide is the anhydrous oxide used in specialty glass and nuclear applications, while boric acid is the hydrated form used in fiberglass, flame retardants, and antiseptic formulations.
Turkey holds an estimated majority of the world's economically recoverable boron mineral reserves, concentrated in the Eskişehir and Kütahya regions. State-controlled mining operations give Turkish producers a structural cost and volume advantage that has made Turkey the default primary supplier for US fiberglass and glass manufacturers, creating notable concentration risk for buyers.
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Subheading 1 of 1 in heading 2810
Subheading 281000 · $7.8M of $7.8M
ImportsExports
Imports
$7.8MYoY · Pro
Exports
$18.1MYoY · Pro
12-mo low · imports
YoY · ProThrough July 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 | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2810000000 | Oxides of Boron and Boric Acid | $7.8M | 9.68% | 100.00% | $751K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2810000000 | Oxides of Boron and Boric Acid | $18.1M |
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.
Exports · July 2026
destination
China and Korea, South together take 62% of it.
customs district
origin
entry
rate provision · imports
the effective duty rate is 9.68%.