The molecule is a benzenesulfonate resulting from the deprotonation of both the carboxy group and the sulfo group of 4-carboxy-4'-sulfoazobenzene; the major species at pH 7.3. It is a member of benzenesulfonates, a monocarboxylic acid anion and a member of azobenzenes. It is a conjugate base of a 4-carboxy-4'-sulfoazobenzene.
4-[(4-sulfonatophenyl)diazenyl]benzoate