28048-33-1 3-(2-Pyridyl)-5,6-bis(4-sulfophenyl)-1,2,4-triazine, monosodium salt 69898-45-9 Benzenesulfonic acid, 4,4'-(3-(2-pyridinyl)-1,2,4-triazine-5,6-diyl)bis-, monosodium salt EINECS 274-196-3 Ferrozine Sodium (3-(pyridin-2-yl)-1,2,4-triazine-5,6-diyl)bis(benzene-4,4'-sulphonate)