The molecule is an organosulfonate oxoanion resulting from the removal of a proton from both of the sulfonic acid groups of Amido Black 10B (acid form). It has a role as a histological dye. It is a conjugate base of an Amido Black 10B (acid form).
4-amino-5-hydroxy-3-[(4-nitrophenyl)diazenyl]-6-phenyldiazenylnaphthalene-2,7-disulfonate