Einecs 289-052-5

4,4'-bis[[2,5-dimethyl-4-[(4-sulphophenyl)azo]phenyl]azo]stilbene-2,2'-disulphonic acid

2,2'-(1,2-Ethenediyl)bis[5-[[2,5-dimethyl-4-[(4-sulfophenyl)azo]phenyl]azo]benzenesulfonic acid]