55 lbs Bag – Assay Borax Anhydrous

Description

55 lbs – Borax Anhydrous – (Sodium Tetraborate Anhydrous) – Lab / Assay Grade
Other common names include:
Sodium Borate, Sodium Tetraborate, Borax, Calcined Borax, Dehydrated Borax, Pyrobor

Sold by the Each (55 lbs) Bag

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

Analysis / Specification

Boric Oxide (B2O3) – 68.4% min
Elemental Boron – 21.24%
Sodium Oxide (Na2O) – 30.45% min
Sulfate as SO4 – 300 ppm max
Cl – 105 ppm max
Total Iron (Fe) – < 50 ppm
US Sieve No. +12 – 5% max

CAS 1330-43-4