Nitrazine Yellow Indicator

5423-07-4

Disodium;3-[ (2,4-dinitrophenyl) diazenyl]-4-hydroxynaphthalene-2,7-disulfonate

BS

C1=CC(=C(C=C1[N+](=O)[O-])[N+](=O)[O-])N=NC2=C(C=C3C=C(C=CC3=C2O)S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+]