Measurement and correlation of solubility of carbendazim in lower alcohols

The solubility of carbendazim in the lower alcohols (Methanol, Ethanol, n-Propanol, n-Butanol, and n-Pentanol) at temperatures from 278.15 K to 323.15 K was measured by a dynamic thermodynamic equilibrium method. The solubility of carbendazim increased with the increasing temperature in each solvent. The experimental data were well correlated by Apelblat equation, and the dissolving enthalpy and entropy were calculated. The solution parameters demonstrated that the dissolution of carbendazim in each alcohol was an endothermic process of entropy increase. The change of standard Gibbs free energy illustrated that the dissolution process became more difficult when the carbon chain in the alcohols got longer.