Synonyms: 2,2'-Stilbenedisulfonic acid, 4-((8-amino-1-hydroxy-3,6-disulfo-2-naphthyl)azo)-4'-((7-amino-1-hydroxy-3-sulfo-2-naphthyl)azo)-, triethanolamine salt (1:5);2,7-Naphthalenedisulfonic acid, 5-amino-3-((4-(2-(4-((7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-2-sulfophenyl)ethenyl)-3-sulfophenyl)azo)-4-hydroxy-, compd. with 2,2',2''-nitrilotris(ethanol) (1:5);2,7-Naphthalenedisulfonic acid, 5-amino-3-(2-(4-(2-(4-(2-(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl)-2-sulfophenyl)ethenyl)-3-sulfophenyl)diazenyl)-4-hydroxy-, compd. with 2,2',2''-nitrilotris(ethanol) (1:5);5-amino-3-[4-[2-[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthyl)azo]-2-sulfo-phenyl]vinyl]-3-sulfo-phenyl]azo-4-hydroxy-naphthalene-2,7-disulfonic acid; 2-(bis(2-hydroxyethyl)amino)ethanol