Lewisite
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Lewisite is an organoarsenic compound. It was once manufactured in the United States, Japan, Germany and the Soviet Union for use as a chemical weapon, acting as a vesicant and lung irritant. Although
Lewisite (top row) and mustard gas test with concentrations from 0.01% to 0.06%
Lewisite identification poster from World War II
Mustard gas
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Mustard gas or sulfur mustard are names commonly used for the organosulfur chemical compound bis sulfide, which has the chemical structure S2, as well as other species. In the wider sense, compounds w
Lewisite
…last for 24 hours. Within minutes, a rash develops and the agent is absorbed through the skin. Large, fluid-filled blisters (similar to those caused by mustard gas exposure) develop after approximately 12 hours and cause pain for 2–3 days. These are severe chemical burns and begin with small blisters in the red…
Soldier with moderate mustard agent burns sustained during World War I showing characteristic bullae on the neck, armpit, and hands
Typical appearance of bullae on an arm caused by vesicant burns
Pallets of 155 mm artillery shells containing "HD" (distilled mustard gas agent) at the Pueblo Chemical Depot. The distinctive color-coding scheme on each shell is visible.