2-Naphthalenesulfonic acid, 5,5'-(carbonylbis(imino-4,1-phenyleneazo))bis(8-((4-sulfophenyl)azo)-, tetrasodium salt 6409-83-2 C.I. Direct Red 84 EINECS 229-089-6 Tetrasodium 5,5'-(carbonylbis(imino-4,1-phenyleneazo))bis(8-((4-sulphonatophenyl)azo)naphthalene-2-sulphonate) Triantine Light Brown RL