1,5-Naphthalenedisulfonic acid, 3,3'-(carbonylbis(imino(5-methoxy-2-methyl-4,1-phenylene)azo))bis-, compd. with 2,2'-iminobis(ethanol), sodium salt 3,3'-(Carbonylbis(imino(5-methoxy-2-methyl-p-phenylene)azo))bis(naphthalene-1,5-disulphonic) acid, compound with 2,2'-iminodiethanol, sodium salt 68966-44-9 EINECS 273-434-3