SMILES: C1=CC(=CC=C1N=NC2=C(C=C3C=C(C(=C(C3=C2N)O)N=NC4=CC=C(C=C4)S(=O)(=O)O)S(=O)(=O)O)S(=O)(=O)O)[N+](=O)[O-]
Description: The molecule is a bis(azo) compound that is naphthalene-2,7-disulfonic acid in which the hydrogens at positions 3, 4, 5, and 6 are replaced by (p-nitrophenyl)azo, amino, hydroxy, and (p-sulfophenyl)azo groups, respectively. The trisodium salt is the histological dye 'naphthalene blue black CS'. It has a role as a fluorochrome and a histological dye. It is a C-nitro compound, an aminonaphthalenesulfonic acid, a bis(azo) compound, a member of naphthols and a member of azobenzenes. It is a conjugate acid of a 4-amino-5-hydroxy-3-[(4-nitrophenyl)diazenyl]-6-[(4-sulfonatophenyl)diazenyl]naphthalene-2,7-disulfonate.