SMILES: C1=CC=C(C=C1)N=NC2=C(C=CC3=CC(=CC(=C32)S(=O)(=O)O)S(=O)(=O)O)O
Description: The molecule is a naphthalenesulfonic acid that is naphthalene-1,3-disulfonic acid carrying additional hydroxy and phenyldiazenyl substituents at positions 7 and 8 respectively. The disodium salt is the biological stain 'orange G'. It is a member of azobenzenes, a naphthalenesulfonic acid and a member of naphthols. It is a conjugate acid of a 7-hydroxy-8-[(E)-phenyldiazenyl]naphthalene-1,3-disulfonate.