The system sodium o-dodecylbenzene sulfonate-sodium chloride water (o-NaDBS-NaCl-H2O) was chosen for solubility studies to determine quantitative data concerning the behavior, in the eutectic freezing process, of a dissolved organic material in the presence of a high inorganic salt concentration at low temperatures. The NaCl was chosen for this study because it is presumed to be the dominant inorganic salt at the eutectic point of sewage. For the organic component of the ternary system, the notorious surfactant found in waste water NaDBS was selected. It was hoped that the data from this particular ternary system would provide valuable information on the solubility phenomenon in waste water and sewage.