Dichlorotoluenes are organochlorine compounds, in particular aryl chlorides, with the formula CH3C6H3Cl2.
Six constitutional isomers exist, differing in the relative position of the two chlorine substituents around the ring.
Several dichlorotoluenes are prepared by treatment of toluene or monochlorotoluenes with chlorine in the presence of various Lewis acids.
Purification is challenging because the individual isomers have similar properties.
2,4-Dichlorotoluene is the precursor to pyrifenox, butafenacil, and the pyrazole derivatives pyrazoxyfen and [pyrazolynate]].