4-Amino-6-((4'-((2,4-diamino-5-sulphophenyl)azo)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)azo)-5-hydroxy-3-((4-nitrophenyl)azo)naphthalene-2,7-disulphonic acid, sodium salt 83763-77-3 EINECS 280-765-7