Dithionous acid

Dithionous acid
IUPAC name Dithionous acid
Other names Hydrosulfurous acid; Hyposulfurous acid
Identifiers
CAS number	15959-26-9 Y
PubChem	24490
ChemSpider	22898 Y
ChEBI	CHEBI:29253 Y
Jmol-3D images	Image 1
SMILES O=S(O)S(=O)O
InChI InChI=1S/H2O4S2/c1-5(2)6(3)4/h(H,1,2)(H,3,4) Y Key: GRWZHXKQBITJKP-UHFFFAOYSA-N Y InChI=1/H2O4S2/c1-5(2)6(3)4/h(H,1,2)(H,3,4) Key: GRWZHXKQBITJKP-UHFFFAOYAX
Properties
Molecular formula	H2S2O4
Molar mass	130.144 g/mol
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Dithionous acid is a sulfur oxoacid with the chemical formula H₂S₂O₄. It is unstable in pure form,^[1] but its salts, known as dithionites, are stable.

See also

• Potassium dithionite
• Sodium dithionite

References

1. ^ Drozdova, Yana; Steudel, Ralf; Hertwig, Roland H.; Koch, Wolfram; Steiger, Thomas (1998). "Structures and Energies of Various Isomers of Dithionous Acid, H2S2O4, and of Its Anion HS2O4- 1". The Journal of Physical Chemistry A 102 (6): 990. doi:10.1021/jp972658d.