Alizarin (C.I. 58000), p.a., pH-Indicator 5,5-6,8, Molar mass (M) 240,21 g/mol, Density (D) 1,575 g/cm³, Boiling point (bp) 430 °C, CAS No. [72-48-0], UN-Nr. 3077, EG-Nr. 200-782-5, Empirical formula C14H8O4