Dithionous acid
Dithionous acid is a sulfur oxoacid with the chemical formula H2S2O4. It has not been observed experimentally. It is the conjugate acid of the dithionite dianion, S2O42-. Dithionite is a well-known reducing agent.
Related compounds
- Dithionic acid, another unstable protonated sulfur oxide, derived from dithionate.