Borax has the molecular formula

Borax (${\mathrm{Na}}_2\left[{\mathrm{B}}_4{\mathrm{O}}_5\left({\mathrm{OH}}_4\right].8{\mathrm{H}}_2\mathrm{O}\right.$), also known as sodium borate, sodium tetraborate, or disodium tetraborate, is a mineral salt of boric acid and an essential boron chemical. White, fluffy, colorless crystals make up the powdered form of borax, which dissolves in water.
The amount of boron in the earth's crust, which is 9 ppm, is not very abundant in nature. An essential mineral for boron is borax.