The type
III eutectic mixtures depend upon the formation of hydrogen
bonds between the halide anion of the salt and the HBD; where
these HBDs are multifunctional, the eutectic point tends to be
toward a 1:1 molar ratio of salt and HBD.13 In the same study the
depression of freezing point was shown to be related to the mass
fraction of HBD in the mixture.