U.S. exports of Anhydrous Disodium Tetraborate (Refined Borax) (HS 284011) totaled $3.0M in August 2026.
Importers of Anhydrous Disodium Tetraborate (Refined Borax) paid $23K in duties in August 2026, an average duty rate of 12.50% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataAnhydrous disodium tetraborate — refined borax in its water-free form — is a critical flux and glass-forming agent used in borosilicate glass, fiberglass insulation, ceramic glazes, and metallurgical applications where the hydrated form would introduce unwanted moisture. Turkey dominates global refined borax production and leads US import supply by a wide margin, a reflection of the country's vast borate mineral reserves; India and Mexico are secondary sources. Classified under the single line 2840110000, it is distinguished from hydrated borax (heading 284019) strictly by the absence of water of crystallization.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
3 import shipments a month
The distinction is the presence or absence of water of crystallization. Anhydrous disodium tetraborate (Na₂B₄O₇) contains no bound water and classifies under 2840110000. The common decahydrate form (Na₂B₄O₇·10H₂O), known as borax decahydrate, and the pentahydrate form classify under heading 284019. The product's certificate of analysis or X-ray diffraction data confirming the anhydrous crystal structure is the key supporting document for the 284011 classification.
Turkey holds the world's largest economically recoverable borate reserves and processes a substantial share of global refined borax output, making it structurally dominant in this market. This concentration means that Turkish export policy changes, logistics disruptions, or currency-driven pricing shifts can have outsized effects on US availability and cost. Buyers reliant on anhydrous borax for continuous glass or ceramics production often maintain strategic inventory buffers or dual-source from secondary suppliers such as India or Mexico to manage this single-country exposure.
Subheading 2 of 4 in heading 2840
Subheading 284011 · $3.0M of $25.5M
ImportsExports
Imports
$183KYoY · free account
Exports
$3.0MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $4.5M of Anhydrous Disodium Tetraborate (Refined Borax) and exported $39.5M.
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 | Duty Collected |
|---|---|---|---|---|---|
| 2840110000 | Anhydrous Disodium Tetraborate (Refined Borax) | $183K | 12.50% | 100.00% | $23K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2840110000 | Anhydrous Disodium Tetraborate (Refined Borax) | $3.0M |
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 · August 2026
destination
China and Japan together take 65% of it.
customs district
origin
entry
rate provision · imports
duty collected equals 12.50% of imports for consumption.
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