6771-82-0 EINECS 229-830-3 Tetrasodium 3-((4-((((4-((2-amino-8-hydroxy-6-sulphonato-1-naphthyl)azo)-3-sulphonatophenyl)amino)carbonyl)amino)-2-sulphonatophenyl)azo)-4-hydroxy-7-(phenylamino)naphthalene-2-sulphonate