Member of chlorophenoxy pesticide group, and are often contaminated with dioxin
Gained notoriety during Vietnam War
Absorbed through skin, GI tract, and respiratory tract
Acts on skeletal muscle but exact mechanism unknown
Agent orange
Blister chemical agents 
Chlorine gas
Lewisite 
Stye 
Sulfur mustard 
Iodoquinol
Phosgene oxime 