Methanedisulfonic acid
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
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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: | |
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
References
- .
- . See note at pages 2058-2060; Cummings, W. A. W. "Some New Sulphur-containing Diacids".
- ISBN 978-3527306732.