The molecule is an aminobenzenesulfonic acid that is 2-aminobenzenesulfonic acid in which one of the amino hydrogens is replaced by a 4-{(4-amino-3-methylphenyl)[4-(phenylimino)cyclohexa-2,5-dien-1-ylidene]methyl} group. It has a role as a fluorochrome and a histological dye. It is an imine, an aminobenzenesulfonic acid, a substituted aniline and an olefinic compound. It is a conjugate acid of a 2-(4-{(4-amino-3-methylphenyl)[4-(phenylimino)cyclohexa-2,5-dien-1-ylidene]methyl}anilino)benzene-1-sulfonate.
2-[[4-[(4-amino-3-methylphenyl)-(4-anilinophenyl)methylidene]cyclohexa-2,5-dien-1-ylidene]amino]benzenesulfonic acid