Methanesulfonic Acid
Title: Methanesulfonic Acid
CAS Registry Number: 75-75-2
Additional Names: Methylsulfonic acid
Molecular Formula: CH4O3S
Molecular Weight: 96.11
Percent Composition: C 12.50%, H 4.19%, O 49.94%, S 33.36%
Line Formula: CH3SO2OH
Literature References: Prepd from sulfur trioxide and methane: Snyder, Grosse, US 2493038 (1950 to Houdry Process); by oxidation of dimethyl disulfide: Johnson, Wolff, US 2697722 (1954 to Standard Oil of Indiana); Proell et al., Ind. Eng. Chem. 40, 1129 (1948). Other prepns and chemistry: Suter, The Organic Chemistry of Sulfur (Wiley, New York, 1944).
Properties: Solid. d418 1.4812. mp 20°. bp10 167°; bp1 122°. Soly at 26-28° in wt %: hexane, 0; methylcyclopentane, 0; benzene, 1.50; toluene, 0.38; o-chlorotoluene, 0.23; ethyl disulfide, 0.47. Thermally stable at moderately elevated temps. Not hydrolyzed by boiling water or hot aq alkali. Corrosive to iron, steel, brass, copper, lead.
Melting point: mp 20°
Boiling point: bp10 167°; bp1 122°
Density: d418 1.4812
 
Derivative Type: Ethyl ester see Ethyl Methanesulfonate
 
Derivative Type: Methyl ester see Methyl Methanesulfonate
 
CAUTION: Strong irritant.
Use: As catalyst in polymerization, alkylation and esterification reactions; as a solvent.

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