SOLUBILITY OF O-CHLOROBENZOIC AND P-CHLOROBENZOIC ACIDS IN HYDROTROPESOLUTIONS

Hydrotropes at high concentrations can substantially enhance the solub ilities of o- and p-chlorobenzoic acids in aqueous solutions. The solu bilities of o- and p-chlorobenzoic acids are determined in aqueous sol utions of sodium butyl monoglycol sulfate (NaBMGS) and sodium p-toluen esulfonate (Na-p-TS) at temperatures of 303, 313, and 323 K. o-Chlorob enzoic acid is solubilized to a larger extent than p-chlorobenzoic aci d. Setschenow constants for both the acids are reported at 303, 313, a nd 323 K. The data are also fitted in a quadratic function of the conc entration of a hydrotrope.