mustard agent

English Thesaurus

1. a toxic war gas with sulfide based compounds that raises blisters and attacks the eyes and lungs; there is no known antidote (noun.substance)

hypernym	:	poison gas,
definition	:	a gas that is poisonous to breath or contact; used in chemical warfare (noun.substance)

hypernym	:	vesicant, vesicatory,
definition	:	a chemical agent that causes blistering (especially mustard gas) (noun.substance)