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

5-[(4,6-Dichloro-1,3,5-triazin-2-yl)amino]-4-hydroxy-3-[(4-methoxyphenyl)azo]naphthalene-2,7-disulfonic acid disodium salt