(S,S)-Ethylenediamine-N,N’-di-2-propanoic acid hydrochloride, (S,S)-H2eddp·HCl, was prepared and its crystal structure determined. The compound was characterized by infrared and 1H- and 13C-NMR spectroscopy. It forms P1 in the space group of a triclinic crystal system with a = 5.3902(2) Å, b = 5.8967(2) Å, c = 10.3319(2) Å, a = 99.625(2)°, b = 91.645(2)°, g = 109.995(2)° and Z = 1.