Hyposulfite

• 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.