Potassium sulphate, min. 99 %, p.a., ACS, ISO, Molar mass (M) 174,27 g/mol, Density (D) 2,66 g/cm³, Boiling point (bp) 1689 °C, CAS No. [7778-80-5], EG-Nr. 231-915-5, Empirical formula K2SO4