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Abstract
The solubility of chlorthalidone in 16 solvent systems was determined in the absence and presence of different amounts of β-cyclodextrin (β-CD). Chlorthalidone (CT) was shown to be more soluble in hydrophilic organic solvents, with the highest solubility in ethylacetate (EtOAc) saturated with water. The solubility of CT in water, butanol, octanol, and dichloromethane (DCM) was enhanced by the addition of β-cyclodextrin. The enantioselective partitioning of CT between water and EtOAc, DCM, butan-1-ol, butan-2-ol, and octan-1-ol was determined in the presence of β-CD at pH 5, 7, and 9. According to the results, both the solubility and partition- ing properties of CT are affected by β-CD in aqueous solution. It was also shown that the solubility of the individual enantiomers differs in the presence of β-CD.