Trithionate

Trithionate is an oxyanion of sulfur with the chemical formula S
₃O
₆. It is the conjugate base of trithionic acid. Dilute sodium hydroxide hydrolyzes S
₄N
₄ as follows, yielding sodium thiosulfate and sodium trithionate:

2 S
₄N
₄ + 6 NaOH + 9 H
₂O → Na
₂S
₂O
₃ + 2 Na
₂S
₃O
₆ + 8 NH
₃

Certain sulfate-reducing bacteria have been known to use the compound in respiration.