Hyposulfite may refer to:
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The sulfoxylate anion ()
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The thiosulfate anion ()
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Sodium thiosulfate, a salt containing the thiosulfate anion
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, 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.
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Dithionite () as in sodium dithionite.
