dilithium disodium 4,4'-bis[(4-hydroxyphenyl)azo]stilbene-2,2'-disulphonate

Benzenesulfonic acid, 2,2-(1,2-ethenediyl)bis5-(4-hydroxyphenyl)azo-, dilithium disodium salt

2,2'-(1,2-Ethenediyl)bis[5-[(4-hydroxyphenyl)azo]benzenesulfonic acid], disodium salt, dilithium derivative