This chemical is a form of nitrogen mustard gas and a powerful vesicant. DBCT is a volatile liquid with powerful vesicant effects. DMAD is a lachrymator and a vesicant. The bruised leaves and stem act as a vesicant and are poisonous. Actinomycin is a vesicant, if extravasation occurs. Phosgene oxime is classified as a vesicant even though it does not produce blisters. This compound is a vesicant that causes the blistering of skin and mucous membranes. Sulfur mustard, a potent vesicant, was used in World War I as a disabling agent. The vesicant effects cause blistering and damage to the skin. Mustard agent has extremely powerful vesicant (blistering) effects on its victims. Sulfur mustard is a vesicant alkylating agent with strong cytotoxic, mutagenic, and carcinogenic properties.