| a white, crystalline, water-soluble solid, NaBO2·3H2O or NaBO3·4H2O, used chiefly as a bleaching agent and antiseptic. |
sodium perborate sodium per·bo·rate (pər-bôr'āt')
n.
A white odorless crystalline compound used as a mild alkaline oxidizing agent in dentifrices and as a topical antiseptic and deodorant.