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We report on the low temperature behaviour of the colloidal electrolyte bymeans of Molecular Dynamics simulations, where the electrostatic interactionswere modeled using effective screened interactions. As in previous works, wehave found a region of gas-liquid coexistence located in the low $T$- low$\rho$ region. At temperatures much lower than the critical one, the systemcannot reach equilibrium, that is, the gas-liquid transition is arrested. Twodifferent mechanisms have been identified to cause arrest: gelation in thelowest $T$ and crowding at intermediate $T$ values, the latter associated withthe crossing point between the binodal and the glass line. To test the latter,the dynamics of the colloidal electrolyte near this crossing point has beencomputed and compared to the universal predictions of the ideal MCT. As inother glass-forming liquids, we found good agreement between this mean fieldtheory and the dynamics of this complex system, although it fails just at thetransition. Interestingly, in this region we found that the dynamics of thissystem is driven mainly by the steric interactions, showing all the typicalproperties of a repulsive colloidal glass. Finally, the isodiffusivity linesshow that in this system with short range attractions, there is no re-entrantglass phenomenon, as opposed to monocomponent systems

Low temperature behavior and glass line in the symmetrical colloidal electrolyte