Smells of a swimming pool or bleach
Irritation of conjunctivae, nose, pharynx, larynx, trachea, and bronchi
Rare ocular injury as tears protect mucous membranes from direct damage
Chlorine gas
Blister chemical agents 
Nitrous oxide
Lewisite 
Methyl isocyanate
Sulfur mustard 
Toxic alcohols
Phosgene oxime 