Vinylsulfonic acid

Vinylsulfonic acid

Names
IUPAC name ethenesulfonic acid
Identifiers
CAS Number	1184-84-5 3039-83-6 (sodium salt)
ChemSpider	56254
Jmol interactive 3D	Image
PubChem	62474
InChI InChI=1S/C2H4O3S/c1-2-6(3,4)5/h2H,1H2,(H,3,4,5) Key: NLVXSWCKKBEXTG-UHFFFAOYSA-N InChI=1/C2H4O3S/c1-2-6(3,4)5/h2H,1H2,(H,3,4,5) Key: NLVXSWCKKBEXTG-UHFFFAOYAA
SMILES C=CS(=O)(=O)O
Properties
Chemical formula	C2H4O3S
Molar mass	108.11 g·mol^−1
Appearance	colouless liquid
Boiling point	95 °C (203 °F; 368 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Vinylsulfonic acid is an organosulfur compound. It is a colorless liquid that tends to polymerize to polyvinylsulfonic acid. It is prepared by dehydration of isethionic acid:^[1]

HOC₂H₄SO₃H → CH₂CHSO₃H + H₂O

More easily handled than the acid is the salt, sodium vinylsulfonate, which is commercially supplied as an aqueous solution.

References

1. Kosswig, Kurt (2000). "Sulfonic Acids, Aliphatic". Ullmann's Encyclopedia of Industrial Chemistry (Wiley-VCH). doi:10.1002/14356007.a25_503. ISBN 3-527-30673-0.