However, the physicochemical information
about l-malic acid is not abundant. The study of phase
equilibria is very important for many industrial applications. More
particularly, knowledge of an accurate solubility is needed for the
design of separation processes such as extractive crystallization and
the safety of operating different processing units such as distillation
columns, absorption units, and extraction plants. The solubility of
solute can also supply basic and theoretical data for industrial
production.