74587-42-1 EINECS 277-933-7 Tetrahydrogen (3-((8-((4-amino-6-chloro-1,3,5-triazin-2-yl)amino)-1-hydroxy-3,6-disulpho-2-naphthyl)azo)-4-hydroxynaphthalene-1,5-disulphonato(6-))cuprate(4-)