sodium 3-carboxylato-1-[2-hydroxy-3-[4-(hydroxysulphonatomethyl)phenoxy]propyl]pyridinium 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 Pyridinium, 3-carboxy-1-(2-hydroxy-3-(4-(hydroxysulfomethyl)phenoxy)propyl)-, inner salt, sodium salt (1:1) Sodium 3-carboxylato-1-[2-hydroxy-3-[4-(hydroxysulfonatomethyl)phenoxy]propyl]pyridinium