2,7-Naphthalenedisulfonic acid, 5-(acetylamino)-4-hydroxy-3-(phenylazo)-, compd. with 2,2'-iminobis(ethanol) and 2,2',2''-nitrilotris(ethanol) (1:1:1) 5-Acetamido-4-hydroxy-3-(phenylazo)-2,7-naphthalenedisulfonic acid,diethanolamine, triethanolamine salt 75673-17-5