In this work, we have measured the solubility and the freezing point depression of Na-1-ethanethiolate, Na-1-propanethiolate, Na-2-propanethiolate, Na-1-butanethiolate, and Na-2-methyl-2-propanethiolate salts in pure water within the concentration range of 0-49 wt/wt% at 1atm. The freezing point curves and solubility curves of five mercaptide salts have been measured at various concentrations of mercaptide salts and further used to find eutectic points.