2,7-Naphthalenedisulfonic acid, 3,3'-((3,3'-dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(5-amino-4-hydroxy-, sodium salt, compd. with 2,2'-iminobis(ethanol) 3,3'-((3,3'-Dimethoxy(1,1'-biphenyl)-4,4'-diyl)diazo)bis(5-amino-4-hydroxynaphthalene-2,7-disulphonic) acid, sodium salt, compound with 2,2'-iminodiethanol 68966-43-8 EINECS 273-433-8