1,3-Dichlorobenzene is primarily used as an intermediate in the production of herbicides and insecticides, playing a crucial role in agricultural pest control. It is also employed in the manufacturing of dyes, resins, and other organic compounds, contributing to the synthesis of various industrial materials. Additionally, it serves as a solvent in certain chemical processes and is utilized in the formulation of degreasers and cleaning agents. Its application extends to the production of pharmaceuticals, where it acts as a building block for active ingredients. In the electronics industry, it is used in the preparation of dielectric fluids and other specialized chemicals.