phosgene oxime

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phos·gene ox·ime (CX),

a blister agent stored by the military of some governments; a powerful irritant that produces immediate pain.
Synonym(s): dichloroformoxime

phos·gene ox·ime

(fos'jēn oks'ēm)
A toxic chemical-warfare agent, dichloroformoxime, CCl2NOH, produced by Russia and other countries of the former Soviet Union. It is a crystalline solid that sublimates to produce vapor and that melts at approximately 35-40° C (95-104° F) and causes urticaria progressing to tissue necrosis (NATO Code CX).
Synonym(s): dichloroformoxime.