2,6-dichlorobenzonitrile is a nitrile that is benzonitrile which is substituted by chlorines at positions 2 and 6. A cellulose synthesis inhibitor, it is used as a pre-emergent and early post-emergent herbicide. It has a role as a herbicide, an agrochemical, a cellulose synthesis inhibitor, a xenobiotic and an environmental contaminant. It is a nitrile and a dichlorobenzene. It is functionally related to a benzonitrile.