Methanedisulfonic acid

Methanedisulfonic acid
Names
Preferred IUPAC name
Methanedisulfonic acid
Other names
methionic acid
Identifiers
CAS Number
  • 503-40-2
3D model (JSmol)
  • Interactive image
ChemSpider
  • 9998
ECHA InfoCard 100.007.243 Edit this at Wikidata
EC Number
  • 207-966-4
PubChem CID
  • 10427
UNII
  • 55N1VUX48W
CompTox Dashboard (EPA)
  • DTXSID3060118 Edit this at Wikidata
InChI
  • InChI=1S/CH4O6S2/c2-8(3,4)1-9(5,6)7/h1H2,(H,2,3,4)(H,5,6,7)
    Key: OPUAWDUYWRUIIL-UHFFFAOYSA-N
  • C(S(=O)(=O)O)S(=O)(=O)O
Properties
Chemical formula
 CH4O6S2
Molar mass 176.16 g·mol−1
Appearance colourless solid
Melting point 138–140 °C (280–284 °F; 411–413 K)[1] decomposes: 209-210 °C[2]
Solubility in water
 miscible
Acidity (pKa) -0.71 (predicted)
Hazards
GHS labelling:
Pictograms
 GHS05: Corrosive
Danger
Hazard statements
 H314, H413
Precautionary statements
 P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Chemical compound

Methanedisulfonic acid is the organosulfur compound with the formula CH2(SO3H)2. It is the disulfonic acid of methane. It is prepared by treatment of methanesulfonic acid with oleum. Its acid strength (pKa) is comparable to that of sulfuric acid.[3]

See also

References

  1. ^ Goldwhite, H.; Gibson, M.S.; Harris, C. (January 1965). "Free radical addition reactions—IV". Tetrahedron. 21 (10): 2743–2747. doi:10.1016/S0040-4020(01)98360-7.
  2. ^ Swan, G. A.; Satchell, D. P. N.; Sykes, K. W.; Michelson, A. M.; Boyd, A. N.; Southern, P. F.; Waters, William A.; Cummings, W. A. W.; Harvey, W. E.; Moore, C. G.; Porter, M.; Menzies, I. A.; Owen, L. W.; Mulley, B. A.; de Ruyter van Steveninck, A. W.; Taylor, E. P. (1958). "Notes". Journal of the Chemical Society (Resumed): 2051–2068. doi:10.1039/JR9580002051. See note at pages 2058-2060; Cummings, W. A. W. "Some New Sulphur-containing Diacids".
  3. ^ Kosswig, Kurt (2000). "Sulfonic Acids, Aliphatic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a25_503. ISBN 3527306730.