Adjective
nonideal (not comparable)
Not ideal.
Azeotropic distillation main Interactions between the components of the solution create properties unique to the solution, as most processes entail nonideal mixtures, where Raoult's law does not hold. Source: Internet
Solvent combinations that can form azeotropes are always nonideal, and as such they deviate from Raoult's law. Source: Internet