2-((4-((4-((8-((2,4-Diamino-5-nitrophenyl)azo)-1-hydroxy-5-sulpho-2-naphthyl)azo)-6-sulpho-1-naphthyl)azo)-1-naphthyl)azo)benzene-1,4-disulphonic acid, potassium sodium salt 83221-45-8 EINECS 280-224-5