Disulfurous acid

Disulfurous acid
IUPAC name disulfurous acid [1]
Other names pyrosulfurous acid
Identifiers
PubChem	28020
ChemSpider	26062 Y
ChEBI	CHEBI:29252 Y
Jmol-3D images	Image 1
SMILES O=S(=O)(O)S(=O)O
InChI InChI=1S/H2O5S2/c1-6(2)7(3,4)5/h(H,1,2)(H,3,4,5) Y Key: WBZKQQHYRPRKNJ-UHFFFAOYSA-N Y InChI=InChI=1S/H2O5S2/c1-6(2)7(3,4)5/h(H,1,2)(H,3,4,5)
Properties
Molecular formula	H2S2O5
Y acid (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

Disulfurous acid or pyrosulfurous acid is an oxoacid of sulfur with the formula H₂S₂O₅. The salts of disulfurous acid are called disulfites or metabisulfites. Disulfurous acid is, like sulfurous acid (H₂SO₃), a phantom acid, which does not exist in the free state. ^[2] In contrast to disulfate (S₂O₇⁻), disulfite has two directly connected sulfur atoms.

References

1. ^ International Union of Pure and Applied Chemistry (2005). Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005). Cambridge (UK): RSC–IUPAC. ISBN 0-85404-438-8. p. 130. Electronic version.
2. ^ Holleman, Wiberg: Inorganic chemistry Academic Press @ Google Books. 2001; pp. 537-540.