2-((1-Amino-7-((5-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-2-sulphophenyl)azo)-8-hydroxy-3,6-disulpho-2-naphthyl)azo)naphthalene-1,5-disulphonic acid 64253-81-2 EINECS 264-758-6