As2CH34

Cacodyl Cac"o*dyl, n. [Gr. ??????? ill-smelling (kako`s bad + ????? to smell) + -yl.] (Chem.) Alkarsin; a colorless, poisonous, arsenical liquid, {As2(CH3)4}, spontaneously inflammable and possessing an intensely disagreeable odor. It is the type of a series of compounds analogous to the nitrogen compounds called hydrazines. [Written also {cacodyle}, and {kakodyl}.] [1913 Webster]