Methanedisulfonic acid
Appearance
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Names | |
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Preferred IUPAC name
Methanedisulfonic acid | |
Other names
methionic acid
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Identifiers | |
3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.007.243 |
EC Number |
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PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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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: | |
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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).
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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
[edit]References
[edit]- ^ 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.
- ^ 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".
- ^ Kosswig, Kurt (2000). "Sulfonic Acids, Aliphatic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a25_503. ISBN 3527306730.