28048-33-1 3-(2-Pyridyl)-5,6-di(4-phenylsulfonic acid)-1,2,4-triazine, disodium salt Benzenesulfonic acid, 4,4'-[3-(2-pyridinyl)-1,2,4-triazine-5,6-diyl]bis-, disodium salt Benzenesulfonic acid, 4,4'-[3-(2-pyridyl)-as-triazine-5,6-diyl]di-, disodium salt Ferrozin Ferrozine NSC149762