4-Hydroxy-5-((4-((4-((1-hydroxy-6-(phenylamino)-3-sulpho-2-naphthyl)azo)-6-sulpho-1-naphthyl)azo)-1-naphthyl)azo)naphthalene-2,7-disulphonic acid, ammonium sodium salt 83221-43-6 EINECS 280-221-9