68016-08-0 EINECS 268-173-7 N-3-(4-Carboxaldehydephenoxy)-2-hydroxy-propylnicotinic acid betaine sodium bisulfite Pyridinium, 3-carboxy-1-(2-hydroxy-3-(4-(hydroxysulfomethyl)phenoxy)propyl)-, inner salt, monosodium salt Sodium 3-carboxylato-1-(2-hydroxy-3-(4-(hydroxysulphonatomethyl)phenoxy)propyl)pyridinium