2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-((4-((4-sulfophenyl)azo)phenyl)azo)-, compd. with 2,2'-iminobis(ethanol) (1:2) 68227-42-9 7-Amino-4-hydroxy-3-((4-((4-sulphophenyl)azo)phenyl)azo)naphthalene-2-sulphonic acid, compound with 2,2'-iminodiethanol (1:2) 7-Amino-4-hydroxy-3-(4-(4-(sulfophenyl)azo)phenylazo)-2-naphthalenesulfonic acid, di(bis(2-hydroxyethyl)ammonium)salt EINECS 269-354-3