1,3-Naphthalenedisulfonic acid, 7,7'-(carbonylbis(imino(2-methyl-4,1-phenylene)azo))bis-, sodium salt, compd. with 2,2'-iminobis(ethanol) 68991-91-3 7,7'-(Carbonylbis(imino(2-methyl-p-phenylene)azo))bis(naphthalene-1,3-disulphonic) acid, sodium salt, compound with 2,2'-iminodiethanol EINECS 273-655-5