Benzenesulfonic acid, 3,3'-azobis[6-[2-[4-[[4-[2-(4-amino- 2-sulfophenyl)ethenyl]-3-sulfophenyl]azo]-2-sulfophenyl] ethenyl]-, ion(8-), (E,E,E,E), octakis(N,N,N- trimethylmethanaminium) Methanaminium, N,N,N-trimethyl-, salt with 3,3'-azobis[6- [2-[4-[[4-[2-(4-amino-2-sulfophenyl)ethenyl]-3- sulfophenyl]azo]-2-sulfophenyl]ethenyl]benzenesulfonic acid], (E,E,E,E), (8:1) NSC633422