sodium tetraborate, or disodium tetraborate, is an important boron compound, a mineral, and a salt of boric acid. Powdered borax is white, consisting of soft colorless crystals that dissolve easily in water. A number of closely related minerals or chemical compounds that differ in their crystal water content are referred to as borax,
S 6849 (OTTO) Sodium tetraborate decahydrate ACS reagent, ≥99.5% Cas 1303-96-4 - used as part of a process (as a flux) meant to eliminate the need for toxic mercury in the gold extraction process, although it cannot directly replace mercury.