Synonyms:
(ch3)2c6h3so3h 2h2o ; 2,5-dimethyl-benzenesulfonicaci ; p-xylene-2-sulphonic acid ; xylenolsulfonic acid 65% ; p-xylenesulfonic acid ; 2,5-dimethylbenzenes ; p-xylene-2-sulfonic acid  ; 2,5-dimethylbenzenesulfonic acid ; p-xylene-2-sulfonic acid ; p-toluene-o-sulfonic acid