It is one of the boron oxoanions, and acts as a weak base. The systematic names are tetrahydroxyboranuide (substitutive) and tetrahydroxidoborate(1−) (additive).
It is one of the boron compounds with hydroxide groups, acting as a weak base. The systematic names are tetrahydroxyboranuide (substitution) and tetrahydroxidoborate(1−) (addition).