**Toxic substances (TS)** are chemical compounds that can have a specific toxic effect on the human or animal body, as well as on plant objects. They are used as weapons in various forms: aerial bombs, rockets, artillery shells, mines, grenades, poisonous cloud, etc. According to the principle of action, agents are divided into asphyxiating, nerve-paralytic, general toxic, skin-resorptive, irritant and psychotomimetic effects. In relation to military chemical weapons, the main thing is to divide toxic substances into four categories: lethal, temporarily incapacitating,