Synonyms: p-Toluenesulfonic acid, pyridine adduct;Benzenesulfonic acid, 4-methyl-, compd. with pyridine (1:1);Pyridine, 4-methylbenzenesulfonate;Benzenesulfonic acid,4-methyl-,compounds,compd. with pyridine (1:1);4-methylbenzenesulfonic acid; pyridine;Pyridinium p-Toluenesulfonate;Pyridinium-P-Toluenesulfonate 98%;PYRIDINIUM P-TOLUENESULFONATE,99%;Pyridinium p-toulene sulfonate (PPTS);