Aqueous solutions ofo-chlorobenzoic acid,m-chlorobenzoic acid andp-chlorobenzoic acid become fluorescent on γ-irradiation. This fluorescence yield can be used for measurement of γ-dose. These three chlorobenzoic acid solutions have been examined for γ-dosimetry under different conditions of concentration, dose rate, pH of irradiation and pH of measurement. Ortho and meta chlorobenzoic acid solutions (10-3M) can be used as γ-ray dosimeters between 5-30,000 and 50-30,000 rads respectively andp-chlorobenzoic acid solution of 10-3M can be used between 50-10,000 rads.