Solubility Aqueous solution is alkaline to litmus and phenolphthalein; pH about pH = 9.5
Formula
B4H20Na2O17
Mol. Weight
381.40
CAS #
1330-43-4, 1303-96-4
Form
Powder
State
Dry Powder; Other Solid; NKRA; Pellets or Large Crystals
Functions
Buffering
Stabilizes pH
Traditional Use
Borax (sodium borate) has been used for centuries in traditional medicine and beauty preparations as an antimicrobial and pH buffer. Historically used to soften water and preserve cosmetic formulations before modern preservative systems were developed.