6-[(4,6-Dichloro-1,3,5-triazin-2-yl)methylamino]-4-hydroxy-3-[(4-methoxy-2-sulfophenyl)azo]-2-naphthalenesulfonic acid

6-[(4,6-dichloro-1,3,5-triazin-2-yl)methylamino]-4-hydroxy-3-[(4-methoxy-2-sulphophenyl)azo]naphthalene-2-sulphonic acid