Ko nga ahuatanga o te borax anhydrous he kiripiri ma, he karaihe karaehe kore ranei, ko te rewa o te karaihe orthorhombic α he 742.5 ° C, ko te kiato he 2.28;He kaha te hygroscopicity, ka memeha i roto i te wai, te glycerin, me te ata rewa i roto i te methanol ki te hanga i te otinga ki te kukū o te 13-16%.Ko tana wairewa wai he kawakore, he kore e rewa ki te waipiro.Ko te borax anhydrous he hua anhydrous ka whiwhi i te wa e whakawerahia ana te borax ki te 350-400°C.Ka tukuna ki te hau, ka taea e ia te makuku ki roto i te borax decahydrate, te borax pentahydrate ranei.