Chloroacetonitrile (ClCH₂CN) is a highly reactive organic compound consisting of a nitrile (-CN) and a chloro (-Cl) functional group. It is used as an intermediate in organic synthesis, including pharmaceuticals, agrochemicals, and dyes. Due to its reactivity, it serves as a key precursor in chemical reactions such as nucleophilic substitution. Chloroacetonitrile is toxic and requires careful handling due to its potential health and environmental hazards.