Borax decahydrate is the refined form of natural sodium borate.
Composed of boric oxide (B2O3), sodium oxide, and water, it is a mild,
alkaline salt, white and crystalline, with excellent buffering and fluxing
properties. Available in powder or granular form, borax decahydrate is
an important multi-functional source of B2O3, particularly for
processes in which the simultaneous presence of sodium is beneficial.