Synonyms: Benzenesulfonic acid, 4-hydroxy-, polymer with formaldehyde and 4,4-sulfonylbisphenol, sodium salt;benzenesulfonic acid, 4-hydroxy-, polymer with formaldehyde and 4,4’-sulfonylbi;Formaldehyde, 4,4’-sulfonylbis[phenol], 4-hydroxybenzenesulfonic acid polymer, sodium salt;s[phenol], sodium salt