1,4-Bis(2-hydroxy-3-sulfopropoxy)-2-butyne, disodium salt 1-Propanesulfonic acid, 3,3'-(2-butyne-1,4-diylbis(oxy))bis(2-hydroxy- 3,3'-(2-Butyne-1,4-diylbis(oxy))bis(2-hydroxypropanesulphonic) acid 40456-31-3 EINECS 254-928-8