Solubilization Behavior and Density Study of 1H-1,2,4-Triazole in Aqueous Organic Solvent Mixtures at (293.15 to 313.15) K

Abstract

Solubility of 1H-1,2,4-triazole in water, methanol, ethanol, n-propanol, and also in water + methanol/ ethanol/ n-propanol binary mixtures have been experimentally measured using a gravimetric method at temperatures (293.15 to 313.15) K. Solubility values were correlated with temperature by the Apelblat equation. The combined nearly ideal binary solvent (NIBS)-Redlich–Kister equation is used to fit experimental solubility data in different solvents at constant temperature. Thermodynamic functions including \(\Delta H_{\text{soln}}^\text{o}\), \(\Delta G_{\text{soln}}^\text{o}\), and \(\Delta S_{\text{soln}}^\text{o}\) of 1H-1,2,4-triazole in different solvents were obtained from the modified van’t Hoff equation. The densities of the saturated solutions were also measured using bicapillary pycknometer in pure and binary solvent mixtures at temperatures mentioned above.