The solubility of salicylanilide
in 12 pure solvents including
ethanol, n-propanol, isopropanol, n-butanol, n-pentanol, ethyl formate, methyl acetate,
ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, and
acetonitrile was measured using the gravimetric method at temperatures
ranging from 283.15 to 323.15 K. The experimental results show that
the solubility of salicylanilide is lower in alcohol than in ester
solvents. In addition, the mole fraction solubility of salicylanilide
in these selected solvents increases with the increase of temperature
and presents the following order at a fixed temperature: ethanol >
isopropanol > n-propanol > n-butanol
> n-pentanol, methyl acetate > ethyl acetate
> propyl
acetate > isopropyl acetate > butyl acetate > ethyl formate
> acetonitrile.
Three models, including the modified Apelblat equation, the van’t
Hoff equation, and the λh equation, were applied
to correlate the measured solubility data. The results indicate that
the three models can predict the experimental values satisfactorily
and the modified Apelblat equation is more appropriate to correlate
the solubility data in 12 solvents.