Chromium(III) potassium sulphate, dodecahydrate, min. 98%, p.a., ACS, Molar mass (M) 499,41 g/mol, Density (D) 1,83 g/cm³, CAS No. [7788-99-0], EG-Nr. 233-401-6, Empirical formula KCr(SO4)2 · 12 H2O