Abstract
The solubility behaviour of haloperidol in individual solvents ranging from non-polar to highly polar solvents was studied. Extended Hansen's method was used to analyze the solubility data and obtain partial solubility parameters of haloperidol. Flory-Huggin's size connection term ` B' was found to further improve the prediction of solubility. A four parameter extended Hansen's approach involving proton-donor and proton-acceptor parameters was also used in fitting the solubility data to a theoretical model. The term W h, used as an empirical measure of solute-solvent interaction due to hydrogen bonding was used in calculating B. Different approaches were thus used in fitting the experimental solubility data to obtain regression equations which aim to provide a reasonable prediction of solubility of haloperidol in untested solvents. Solubility parameter was calculated from the partial solubility parameter values obtained from the different methods of data analysis, and compared with the theoretically obtained values. Solubility parameter of haloperidol is fixed at 10.58 H.
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