It is well known that the Debye-Hückel theory (DH) for charged hard spheres in a continuum medium presents a critical point and consequently phase separation. In the present work we analyze how the predicted critical point for the pure DH theory changes if other species are present. One of the species consists of molecules with a permanent dipole moment p, and the second species consists of molecules with a permanent linear quadrupole moment m. We find that the critical point depends on the relative amount of neutral molecules to ions and on the value of the respective moments.