Njirimara nke borax anhydrous bụ kristal na-acha ọcha ma ọ bụ kristal na-enweghị agba, ebe agbaze nke α orthorhombic crystal bụ 742.5 Celsius C, na njupụta bụ 2.28;Ọ nwere hygroscopicity siri ike, na-agbaze na mmiri, glycerin, ma jiri nwayọọ nwayọọ na-agbaze na methanol iji mepụta ngwọta na ntinye nke 13-16%.Ya aqueous ngwọta bụ weakly alkaline na insoluble na mmanya.Anhydrous borax bụ ngwaahịa na-ekpo ọkụ na-enweta mgbe a na-ekpo ọkụ borax ruo 350-400 Celsius.Mgbe etinyere ya na ikuku, ọ nwere ike itinye mmiri n'ime borax decahydrate ma ọ bụ borax pentahydrate.