Synonyms: disodium 7-[[2-(acetylamino)-4-[(5-chloro-2,6-difluoro-4-pyrimidinyl)amino]phenyl]azo]naphthalene-1,3-disulphonate;1,3-Naphthalenedisulfonic acid, 7-2-(acetylamino)-4-(5-chloro-2,6-difluoro-4-pyrimidinyl)aminophenylazo-, disodium salt;7-[[(2-Acetylamino)-4-[(5-chloro-2,6-difluoro-4-pyrimidinyl)amino]phenyl]azo]-1,3-naphthalenedisulfonic acid, disodium salt;C.I. Reactive Yellow 125;2-[2-Acetylamino-4-[(5-chloro-2,6-difluoropyrimidin-4-yl)amino]phenylazo]naphthalene-6,8-disulfonic acid disodium salt