(2,4-Dinitrophenyl)pyridinium chloride 1-(2,4-Dinitrophenyl)pyridinium chloride 40808-00-2 4185-69-7 EINECS 224-059-9 N-(2,4-Dinitrophenyl)pyridinium chloride NSC 16029 Pyridinium, 1-(2,4-dinitrophenyl)-, chloride