SMILES: C1=CC=C(C=C1)N=NC2=CC=C(C=C2)N=NC3=C(C=CC4=CC(=CC(=C43)S(=O)(=O)O)S(=O)(=O)O)O
Description: The molecule is a naphthalenesulfonic acid that is 7-hydroxynaphthalene-1,3-disulfonic acid substituted at position 8 by a [4-(phenyldiazenyl)phenyl]diazenyl group. The disodium salt is the biological stain 'woodstain scarlet'. It is a member of azobenzenes, a bis(azo) compound, a member of naphthols and a naphthalenesulfonic acid. It is a conjugate acid of a 7-hydroxy-8-{[4-(phenyldiazenyl)phenyl]diazenyl}naphthalene-1,3-disulfonate.