Synonyms: 4,4'-Bis((4-methoxy-6-((2-sulphoethyl)amino)-1,3,5-triazin-2-yl)amino)stilbene-2,2'-disulphonic acid, sodium salt, compound with 2,2'-iminodiethanol;Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis(5-((4-methoxy-6-((2-sulfoethyl)amino)-1,3,5-triazin-2-yl)amino)-, sodium salt, compd. with 2,2'-iminobis(ethanol)