6232-49-1 Benzoic acid, 3,3'-((2,2'-disulfo(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(6-hydroxy-, tetrasodium salt EINECS 228-336-5 Tetrasodium 5,5'-((2,2'-disulphonato(1,1'-biphenyl)-4,4'-diyl)bis(azo))disalicylate