Tetrahydroxyborate


Tetrahydroxyborate (systematically named tetrahydroxyboranuide and tetrahydroxidoborate(1−)) is an inorganic anion with the chemical formula [B(OH)
4]− (also written as B(OH)−
4 or BH
4O−
4). It contributes no colour to tetrahydroxyborate salts. It is found in the mineral hexahydroborite, Ca(B(OH)4)2·2H2O (originally formulated CaB2O4.6H2O). It is classified as a weak base.