tetrasodium 2-[[4-chloro-6-[[3-[(1-hydroxy-4-sulphonato-2-naphthyl)azo]-4-sulphonatophenyl]amino]-1,3,5-triazin-2-yl]amino]benzene-1,4-disulphonate

2-[4-Chloro-6-[3-[1-hydroxy-4-(sodiosulfo)-2-naphthalenylazo]-4-(sodiosulfo)phenylamino]-1,3,5-triazin-2-ylamino]-1,4-benzenedisulfonic acid disodium salt