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

5-(4,6-Dichloro-1,3,5-triazin-2-ylamino)-4-hydroxy-3-(4-sodiosulfo-1-naphtylazo)-2,7-naphthalenedisulfonic acid disodium salt