This document reports on a kinetic study of the reaction between 5-chlorosalicylaldehyde and m-toluidine to form a Schiff base. The reaction was studied spectrophotometrically in ethanol solution at temperatures ranging from 303 to 318 K. The reaction was found to be first order with respect to both 5-chlorosalicylaldehyde and m-toluidine. The rate of reaction increased with increasing temperature. Thermodynamic parameters including activation energy, enthalpy, entropy and free energy were calculated from the temperature dependence of the reaction rate.