Anhydrous Disodium Tetraborate Powder
Pure anhydrous disodium tetraborate (Na2B4O7), also known as refined borax in its dehydrated form, used in industrial glass manufacturing and as a flux. It falls under HTS 2840.11.00.00 as it is specifically the anhydrous variant of disodium tetraborate without water of crystallization. This chemically defined inorganic borate compound is refined for high-purity applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing 99% or more by weight of B2O3 but hydrated
Hydrated forms of disodium tetraborate fall under 2840.19 as they include water of crystallization, changing the chemical form.
If sold as a boric acid derivative for retail or lower purity
Boric acid and similar borates not specifically refined disodium tetraborate are classified under heading 2830.
If mixed with organic stabilizers or as a formulated mixture
Organo-inorganic mixtures or preparations not purely chemically defined per Chapter 28 Note 2 shift to Chapter 38.
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Import Tips & Compliance
• Verify purity certificate to confirm anhydrous state and refined borax classification per Chapter 28 notes
• Include Material Safety Data Sheets (MSDS) for borate compounds to comply with hazardous material regulations
• Avoid misclassification as hydrated borax (2840.19), which has different subheading and potential duty rates
Related Products under HTS 2840.11.00.00
Refined Anhydrous Borax Granules
Granular anhydrous disodium tetraborate (refined borax) for use in ceramic glazes and metallurgical fluxes. Classified under HTS 2840.11.00.00 due to its anhydrous nature and status as refined disodium tetraborate. Meets Chapter 28 definitions for chemically pure inorganic borates.
High-Purity Anhydrous Sodium Tetraborate
High-purity anhydrous Na2B4O7 for laboratory reagents and pharmaceutical intermediates. It is classified in HTS 2840.11.00.00 as refined anhydrous disodium tetraborate, a chemically defined borate per Chapter 28 notes. Devoid of crystal water, distinguishing it from pentahydrate forms.
Industrial Grade Anhydrous Borax
Industrial anhydrous disodium tetraborate for enamel frits and soldering fluxes. Falls under HTS 2840.11.00.00 as refined anhydrous borax, explicitly covered in the subheading for peroxoborates and borates. Chemically defined without hydration.
Anhydrous Refrax Borax
"Refrax" brand anhydrous disodium tetraborate for fiberglass production. Classified under HTS 2840.11.00.00 as it is the anhydrous form of refined borax, a pure inorganic borate compound. Used where hydration would interfere with processes.
Pharma-Grade Anhydrous Tetraborate
Pharmaceutical-grade anhydrous disodium tetraborate for buffer solutions in drug manufacturing. HTS 2840.11.00.00 applies as refined anhydrous borax, chemically defined per Chapter 28. High purity ensures no water interference in formulations.
Technical Anhydrous Borax 99.5%
Technical-grade 99.5% anhydrous disodium tetraborate for welding fluxes. Under HTS 2840.11.00.00 as anhydrous refined borax, distinguished by lack of water molecules. Essential for high-temperature applications.