The tetrathionate anion, S4O62−, 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 the Lewis base S22− to SO3. Tetrathionate is one ...
• (n.) A salt of tetrathionic acid.
Tet`ra·thi'on·ate noun (Chemistry) A salt of tetrathionic acid.