Potassium hydrogen phthalate, min. 99,5 %, p.a., ISO, Molar mass (M) 204,23 g/mol, Density (D) 1,636 g/cm³, Flash point (flp) 197,3 °C, Boiling point (bp) >300 °C, CAS No. [877-24-7], EG-Nr. 212-889-4, Empirical formula C8H5KO4