6-Amino-5-[[5-[[5-[(5-chloro-2,6-difluoro-4-pyrimidinyl)amino]-2-sulfophenyl]amino]-2-sulfophenyl]azo]-1-naphthalenesulfonic acid trisodium salt

trisodium 6-amino-5-[[5-[[5-[(5-chloro-2,6-difluoropyrimidin-4-yl)amino]-2-sulphonatophenyl]amino]-2-sulphonatophenyl]azo]naphthalene-1-sulphonate