Odor of garlic, onion, or horseradish
Physical symptoms do not occur until approximately 20 minutes but may take up to 4 hours
Penetrates skin, rubber gloves, clothing
Causes both local and systemic toxicity
Eye
Only 1% have permanent eye damage; the majority heal within 2 weeks to 2 months without sequelae
Conjunctivitis
Blepharospasm
Skin
Blisters resembling second degree burns
Within 4-8 hours: erythema + burning → vesicle and bullae formation
Airway
Dose-dependent ranging from nasopharyngeal irritation to hemorrhagic necrosis of bronchioles
Only 1% have permanent eye damage; the majority heal within 2 weeks to 2 months without sequelae
Conjunctivitis
Blepharospasm
Blisters resembling second degree burns
Within 4-8 hours: erythema + burning → vesicle and bullae formation
Dose-dependent ranging from nasopharyngeal irritation to hemorrhagic necrosis of bronchioles
Bone marrow suppression leading to neutropenia within 3-5 days → development of secondary infections
Sulfur mustard toxicity
Blister chemical agents 
Chloroform toxicity
Lewisite 
Hydrazine toxicity
Sulfur mustard 
Methane toxicity
Phosgene oxime 