Choking agents

Blister agents

Blood agents

Nerve agents

Riot control agents



Injure the nose, throat and lungs. Inhalation causes lungs to bleed, drowning victim.

Severely burn and blister the skin or respiratory tract.

Inhibit the ability of blood cells to absorb oxygen, causing suffocation.

Enter body through skin or lungs. Rapidly disrupt the transmission of nerve impulses.

Eye, skin and respiratory-tract irritants. Can be fatal in concentrated doses.

Cause psychotic disorders, including incapacitation and an inability to make decisions.

Destroy vegetative cover and crops and can cause nerve damage.

Chlorine gas, phosgene gas

Mustard gas, lewisite

Cyanide compounds, arsenic compounds

Sarin, tabun, soman

Tear gas (CS gas or CN gas)


Agent Orange, paraquat

SOURCE: Sources: Staff reports, Organization for the Prohibition of Chemical Weapons. GRAPHIC: Patterson Clark / The Washington Post. Published Aug. 22, 2013.