6409-86-5 EINECS 229-090-1 Tetrasodium 2-((2-amino-6-((4-((4-((3-carboxylato-4-hydroxyphenyl)azo)-7-sulphonato-1-naphthyl)azo)-2,5-dimethoxyphenyl)azo)-5-hydroxy-7-sulphonato-1-naphthyl)azo)-5-nitrobenzoate