In the crystal structure of the title compound, C(11)H(26)N(3) (+)·Cl(-)·C(4)H(4)N(4), the (2Z)-2,3-diamino-but-2-ene-dinitrile (Z-DAMN) mol-ecules are connected with the chloride ions via N-H⋯Cl hydrogen bonds, forming ribbons running along the a axis. The guanidinium ions are located in between the ribbons formed by Z-DAMN mol-ecules and chloride ions.
