Chemical contamination or chemical gases are all kinds of chemicals that can be converted to gases, vapors, droplets or dust to make the air unfit for respiration. Depending on their nature and the damage they cause to the human body, chemical weapons are divided into the following categories:
Asphyxiating or suffocating gases
Urticarial or caustic gases
Irritant gases (distinguished into tear gas and pterogens)
Toxic gas
Explosive gases
Smoke
Also, chemical weapons outside the above classification are also distinguished according to the time of attack and effect of energy on the human body in:
Volatile or transient gases
Gases of medium duration (partial hours)
Chemical Threat: This threat comes from Chemicals, which are distinguished: asphyxiating, blood, caustic, nerve and irritants. They are divided into two general categories, “deadly” and “causing disability”, although there is not always a clear line between them. They are usually categorized based on their obsession, into “obsessive” and “non-obsessive”. They disperse in solid, liquid, gaseous form, as well as in aerosol and cause significant losses in the population. Their use may, due to the infection caused, prohibit the use of means, areas, itineraries, facilities. The use of these chemicals is primarily aimed at causing surprise and creating massive losses and secondarily at slowing down the pace of business with persistent contamination.