Synonyms: benzenesulfonic acid, 4-ethenyl-, calcium salt, polymer with 1,4-diethenylbenze;Benzenesulfonic acid, 4-ethenyl-, calcium salt, polymer with 1,4-diethenylbenzene;benzenesulfonic acid, 4-ethenyl-, calcium salt, polymerwith 1,4-diethenylbenzene;Benzenesulfonic acid,4-ethenyl-,calcium salt,polymer with 1,4-diethenylbenzene