Synonyms: 2,7-Naphthalenedisulfonic acid, 4-amino-6-((4'-((2,4-diamino-5-sulfophenyl)azo)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)azo)-5-hydroxy-3-((4-nitrophenyl)azo)-, sodium salt, compd. with 2,2',2''-(nitrilotris(2,1-ethanediyloxy))tris(ethanol);sodium; 4-amino-6-[4-[4-(2,4-diamino-5-sulfo-phenyl)azo-3-methoxy-phenyl]-2-methoxy-phenyl]azo-5-hydroxy-3-(4-nitrophenyl)azo-7-sulfo-naphthalene-2-sulfonate; 2-[2-[bis[2-(2-hydroxyethoxy)ethyl]amino]ethoxy]ethanol