Due to lower water solubility than other irritant gases (e.g. Chlorine gas),<unk>  causes less immediate irritation of the mucous membranes and therefore is able to penetrate to and damage the lower respiratory tract
Immediate effects (depends on concentration) - mucous membrane irritation, tachypnea, shallow breathing
At low concentrations, no immediate symptoms may be noted
Latent phase length is inversely proportional to inhaled dose
Delayed effects (depends on total inhaled dose) - respiratory distress, cough, and finally pulmonary edema
May take hours to develop
At low concentrations, no immediate symptoms may be noted
May take hours to develop
Phosgene
Blister chemical agents 
Levoleucovorin
Lewisite 
Tdap
Sulfur mustard 
PALS 
Phosgene oxime 