Abstract: Purified salt, table and iodized, was produced from the Kohat rock salt. A process was developed for this purpose. Pure salt contains 39.3% Na and 60.7% Cl by weight. Chemical analysis of Kohat rock salt was carried out having the composition of Na 33.91, Cl 54.40, K 1.58, MgO 0.05, CaO 1.66, SO3 1.30 and other insoluble impurities of 6.90%. During the process of rock salt, impurities were reduced to negligible values and standard composition of Na and Cl was achieved to 39.23 and 60.61%, respectively.