chloroacetone
[ klawr-oh-as-i-tohn, klohr- ]
/ ˌklɔr oʊˈæs ɪˌtoʊn, ˌkloʊr- /
noun
a colorless, lachrymatory, poisonous liquid, C3H5ClO, used chiefly in organic synthesis and in the manufacture of insecticides and perfumes.