Definition: 515786. 2,4 dichloro N [(1Z,3E) 2 [3 chloro 5 (trifluoromethyl)pyridin 2 yl] 3 {[(2,4 dichlorophenyl)methoxy]imino}prop 1 en 1 yl] aniline is a potent nerve agent known for its ability to cause irreversible damage to nerve cells. Its chemical name is N (1Z,3E) 2 trichloro-5 (trifluoromethyl)-pyridinium; it's also called 2,4 dichloro N [(1Z,3E) 2 [3 chloro 5 (trifluoromethyl)pyridin 2 yl] 3 {[(2,4 dichlorophenyl)methoxy]imino}prop 1 en 1 yl], and it's commonly known as the "blue phosphorus." This compound is often used in military applications for its ability to cause a severe chemical warfare injury.