trisodium 5-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-4-hydroxy-3-[[4-[(4-methoxyphenyl)amino]-3-sulphonatophenyl]azo]naphthalene-2,7-disulphonate

5-[(4,6-Dichloro-1,3,5-triazin-2-yl)amino]-4-hydroxy-3-[[4-[(4-methoxyphenyl)amino]-3-[(sodiooxy)sulfonyl]phenyl]azo]-2,7-naphthalenedisulfonic acid disodium salt