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55 lbs Bag - Assay Borax Anhydrous


Model: 17100-55
Shipping Weight: 57lbs

55 lbs - Borax Anhydrous - (Sodium Tetraborate Anhydrous)

For use as an assaying flux (or flux thinner) for melting or smelting gold and other precious metals.

Other common names include sodium borate, sodium tetraborate, borax, Calcined Borax, Dehydrated Borax, Pyrobor

Lab / Assay Grade
CAS 1330-43-4
Analysis Specification
Boric Oxide (B2O3) 68.5% min
Equivalent Borax (Na2B4O7) 99.0%
Sodium Oxide (Na2O) 30.5% min
Sulfate as SO4 150 ppm max
Total Iron (Fe) < 50 ppm
US Sieve No. +12 2% max
Sold by the Each (55 lbs) Bag

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Technical Data Sheet

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