Benzenesulfonicacid,4-ethenyl-,ammoniumsalt,homopolymer; p-Styrenesulfonicacid,ammoniumsalt,homopolymer; POLYSTYRENE SULFONATE, AMMONIUM SALT; POLY(4-AMMONIUM STYRENESULFONIC ACID),30 W T. % SOLUTION IN WATER; poly(4-styrenesulfonic acid) ammonium salt solution; 4-Ethenylbenzenesulfonic acid ammonium salt homopolymer; Poly(4-styrenesulfonic acid) solution ammonium salt