Chromotrope® FB (C.I. 14720), for microscopy, Molar mass (M) 502,43 g/mol, Density (D) 0,629 g/cm³, Flash point (flp) >225 °C, Boiling point (bp) 907,5 °C, CAS No. [3567-69-9], EG-Nr. 222-657-4, Empirical formula C20H12N2Na2O7S2