Bisulfite ion (IUPAC-recommended nomenclature: hydrogen sulfite) is the ion HSO3−. Salts containing the HSO3− ion are termed bisulfites also known as sulfite lyes. For example, sodium bisulfite is NaHSO3. ==Structure== Some evidence may suggest that the proton in bisulfite ion is located on sulfur, giving rise to C3v symmetry. There is, howeve... Found on http://en.wikipedia.org/wiki/Bisulfite