4,4'-Bis((p-hydroxyphenyl)azo)stilbene-2,2'-disulphonic acid, sodium salt, compound with 2-aminoethanol 68966-48-3 Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis(5-((4-hydroxyphenyl)azo)-, sodium salt, compd. with 2-aminoethanol EINECS 273-436-4