Awọn ohun-ini ti borax anhydrous jẹ awọn kirisita funfun tabi awọn kirisita gilaasi ti ko ni awọ, aaye yo ti α orthorhombic crystal jẹ 742.5 ° C, ati iwuwo jẹ 2.28;O ni hygroscopicity ti o lagbara, titu ninu omi, glycerin, ati laiyara tu ni kẹmika kẹmika lati ṣe ojutu kan pẹlu ifọkansi ti 13-16%.Ojutu olomi rẹ jẹ ipilẹ alailagbara ati insoluble ninu oti.Borax anhydrous jẹ ọja anhydrous ti a gba nigbati borax ba gbona si 350-400°C.Nigbati a ba gbe sinu afẹfẹ, o le fa ọrinrin sinu borax decahydrate tabi borax pentahydrate.