Sodium bromite

Sodiumbromite is used in preparation method of high-purity sodium bromite aqueous solution.

NaBrO2

Bromous acid can thus be produced by a classical chemical or an electrochemical method in which hypobromite is oxidized to the bromite anion:
HBrO＋ HClO→HBrO2＋ HCl or HBrO＋ H2O＋ e^- →HBrO2＋ H2
Also disproportioning of hypobromous acid will give bromous acid and hydrobromic acid:
2HBrO＋ heat→HBrO2＋ HBr
In addition, a rearrangement reaction of bromic acid and hydrobromic acid will produce bromous acid:
2HBrO3＋ HBr→3HBrO2