Hyposulfite may refer to: The sulfoxylate anion () The thiosulfate anion () Sodium thiosulfate, a salt containing the thiosulfate anion , a reported sulfur oxyanion. However salts containing and are not well characterized; they would be conjugate bases derived from the parent thiosulfurous acid (), which is also of doubtful existence. Dithionite () as in sodium dithionite.
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