Solubility Determination and Correlation of Glibenclamide in 11 Monosolvents and (Acetone + Acetonitrile) Binary Solvents from 283.15 K to 323.15 K

Glibenclamide (GCM) is an oral antihyperglycemic drug and widely used to treat type-II diabetes. The quality of the GCM product impacts the efficacy of the medicine. However, the quality of the product is determined by the crystallization process, in which the solubility property plays a significant role. In this study, GCM solubility in 11 monosolvents (methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, acetone, acetonitrile, methyl isobutyl ketone, methyl acetate and ethyl acetate) and (acetone + acetonitrile) binary solvents, has been determined through a gravimetric method from 283.15 K to 323.15 K. It elucidates that GCM has the highest solubility in acetone among the 11 monsolvents. Meanwhile, the solubility of GCM in (acetone + acetonitrile) binary solvents increases when the mole fraction of acetone rises. Then, we correlated the solubility data in monosolvents using the modified Apelblat model and nonrandom two-liquid (NRTL) model. Besides, the modified Apelblat model, the CNIBS/R-K model, Jouyban–Acree model, and NRTL model were adopted to fit the data in (acetone + acetonitrile) mixture solvents. Furthermore, thermodynamic properties were calculated on the basis of the NRTL model.