About Tetrathionate
The tetrathionate anion, S ₄O²⁻ ₆, is a sulfur oxoanion derived from the compound tetrathionic acid, H₂S₄O₆. Two of the sulfur atoms present in the ion are in oxidation state 0 and two are in oxidation state +5. Alternatively, the compound can be viewed as the adduct resulting from the binding of S²⁻ ₂ to SO₃.
