disodium 4,4'-bis[[4-[(2-hydroxyethyl)amino]-6-phenoxy-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulphonate

4,4'-Bis[2-phenoxy-4-(2-hydroxyethylamino)-1,3,5-triazin-6-ylamino]stilbene-2,2'-disulfonic acid disodium salt