The molecule is a naphthalenesulfonic acid that is 3-(phenyldiazenyl)naphthalene-2,7-disulfonic acid carrying additional phenyldiazenyl, hydroxy and acetamido substituents at position 3, 4, and 5 respectively. The disodium salt is the biological stain 'azophloxine'. It is a member of azobenzenes, a naphthalenesulfonic acid, a member of naphthols and a member of acetamides. It is a conjugate acid of a 5-acetamido-4-hydroxy-3-(phenyldiazenyl)naphthalene-2,7-disulfonate.
5-acetamido-4-hydroxy-3-phenyldiazenylnaphthalene-2,7-disulfonic acid