Equilibrium solubility of cesium chloride hydrochloric acid water system is measured in the temperature range of 24 to 50degreesC. Based on this data and the solubility data of the cesium chloride-water system available in the literature, a simple and practical method for preperation and purification of cesium chloride is presented. A rapid and sensitive analytical system employing atomic absorption spectrometry (AAS) convenient to monitor the quality of the products is also described.