The solubility of cinnarizine has been investigated in acetonitrile, butyl acetate, 1-butanol, 2-propanol, and water in a temperature range from 288.15 K to 313.15 K. During crystallization from these solvents two different crystal morphologies of cinnarizine were observed. The caloric properties (melting temperature, melting enthalpy, and the difference in the heat capacity of solid and liquid cinnarizin) were measured by differential scanning calorimetry. The temperature-dependent solubility of cinnarizine in different organic solvents and in water was modeled using the perturbed-chain statistical associating fluid theory and was in good agreement with the experimental data.
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