trisodium 7-[[4-chloro-6-[(4-sulphonatophenyl)amino]-1,3,5-triazin-2-yl]methylamino]-4-hydroxy-3-[(2-sulphonatophenyl)azo]naphthalene-2-sulphonate

7-[4-Chloro-6-[4-(sodiosulfo)phenylamino]-1,3,5-triazin-2-ylmethylamino]-4-hydroxy-3-[2-(sodiosulfo)phenylazo]-2-naphthalenesulfonic acid sodium salt