1-Propanesulfonic acid, 3-(bis(2-hydroxyethyl)amino)-2-hydroxy- 3-(Bis(2-hydroxyethyl)amino)-2-hydroxypropanesulphonic acid 3-(N-Bis(hydroxyethyl)amino)-2-hydroxypropanesulfonic acid 68399-80-4 EINECS 269-992-2 NSC 378145