Synonyms: Benzene,diethenyl-,polymerwithethenylbenzeneandethenylethylbenzene,sulfonated,sodiumsalts;dowex88ion-exchangeresin;Ethenylbenzene,diethenylbenzene,ethylethenylbenzenepolymer,sulfonated,sodiumsalt;DOWEX HCR-W2, NA+ FORM;DOWEX(R) HCR-W2;CATION EXCHANGE RESIN, DOWEX(R) HCR-W2, H+ FORM;CATION EXCHANGE RESIN, DOWEX(R) HCR-W2, NA+ FORM;DOWEX 50 W X 2, NA(+)-FORM, 100-200 MESH