2,2'-(1,2-Ethenediyl)bis(5-((4-hydroxyphenyl)azo)benzenesulfonic acid), disodium salt, dilithium derivative 66104-72-1 Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis(5-((4-hydroxyphenyl)azo)-, dilithium disodium salt Benzenesulfonic acid, 2,2'-(1,2-ethenyldiyl)bis(5-((4-hydroxyyphenyl)azo)-, dilithium, disodium salt Dilithium disodium 4,4'-bis((4-hydroxyphenyl)azo)stilbene-2,2'-disulphonate EINECS 266-159-5