Azophloxine, CI 18050, Disodium 5-(acetylamino)-4-hydroxy-3-(phenyldiazenyl)naphthalene-2,7-disulfonate, 7-Hydroxy-8-[(4-sulfo-1-naphthalenyl)azo]-1,3-naphthalenedisulfonic acid, trisodium salt, 2,7-Naphthalenedisulfonic acid, 5-(acetylamino)-4-hydroxy-3-(phenylazo)-, disodium salt