: a corrosive liquid acid CH4O3S that is used especially as a catalyst in chemical reactions (such as polymerization and esterification)
Methanesulfonic acid has been developed as an esterification catalyst in place of sulfuric acid for the synthesis of resins in paints and coatings.—Stanley E. Manahan, Toxicological Chemistry and Biochemistry, 2003
The mesylate salt is obtained by reaction with methanesulfonic acid.—Anna M. Wodlinger, Remington: The Science and Practice of Pharmacy, 2005
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