6854-81-5 Benzenesulfonic acid, 2,2'-(carbonylbis(imino(2-methyl-4,1-phenylene)azo(2-methyl-4,1-phenylene)azo))bis(5-((4-sulfophenyl)azo)-, tetrasodium salt C.I. Direct Brown 106 EINECS 229-950-6 Tetrasodium 2,2'-(carbonylbis(imino(2-methyl-4,1-phenylene)azo(2-methyl-4,1-phenylene)azo))bis(5-((4-sulphonatophenyl)azo)benzenesulphonate)