4,4'-(Carbonylbis(imino(1-hydroxynaphthalene-6,2-diyl-3-sulpho)azo))bisbenzoic acid, compound with 2,2'-iminobis(ethanol) (1:4) 4,4'-Ureylenebis((1-hydroxy-3-sulfo-6,2-naphthalenediyl)-2-azo)dibenzoic acid, diethanolamine salt (1:4) 72906-34-4 Benzoic acid, 4,4'-(carbonylbis(imino(1-hydroxy-3-sulfo-6,2-naphthalenediyl)azo))bis-, compd. with 2,2'-iminobis(ethanol) (1:4) EINECS 276-998-9