Also Called: 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-[[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)