100-87-8 4-11-00-00485 (Beilstein Handbook Reference) 57267-76-2 BENZYLSULFONIC ACID BRN 2208420 Benzenemethanesulfonic acid EINECS 202-897-6 HSDB 5339 Methanesulfonic acid, phenyl- Phenylmethanesulfonic acid Toluene-alpha-sulphonic acid alpha-Toluenesulfonic acid