Methanedisulfonic acid
Names
Preferred IUPAC name
Methanedisulfonic acid
Other names
methionic acid
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.007.243 Edit this at Wikidata
EC Number
  • 207-966-4
UNII
  • 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
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]
miscible
Acidity (pKa) -0.71 (predicted)
Hazards
GHS labelling:
GHS05: Corrosive
Danger
H314, H413
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).

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. "Sulfonic Acids, Aliphatic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a25_503. ISBN 978-3527306732.
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