The present invention relates to a new crystalline phase of (3S,3S') 4,4'-disulfanediylbis(3-aminobutane 1-sulfonic acid) (ABSD) with L-lysine and its use, particularly in the pharmaceutical industry, and to processes for preparation thereof. The invention is also directed to pharmaceutical compositions containing at least one crystalline phase of (3S,3S') 4,4'-disulfanediylbis(3-aminobutane 1-sulfonic acid) (ABSD) with L-lysine and to the therapeutic or prophylactic use of such crystalline phase and compositions comprising the same.