85391-42-0 EINECS 286-796-2 Trisodium 3-((2-chloro-4-nitrophenyl)azo)-5-((2,4-dihydroxy-5-((4-((4-nitro-2-sulphonatophenyl)amino)phenyl)azo)phenyl)azo)-4-hydroxynaphthalene-2,7-disulphonate