Synonyms: dipotassium 3,3'-sulphonylbis(benzenesulphonate);3,3'-sulfonylbis-benzenesulfonic acid dipotassium salt;Benzenesulfonic acid,3,3'-sulfonylbis-, dipotassium salt;Benzenesulfonic acid,3,3'-sulfonylbis-,dipotassium salt;3,3'-Sulfonylbis(benzenesulfonic acid potassium) salt