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

7-[[4-Chloro-6-[N-[(sodiooxysulfonyl)methyl]anilino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[[2-(sodiooxysulfonyl)phenyl]azo]-2-naphthalenesulfonic acid sodium salt