2,5-Dichloroterephthalonitrile is primarily used as an intermediate in the synthesis of various organic compounds, particularly in the production of agrochemicals and dyes. Its structure allows it to serve as a key building block in the manufacture of herbicides and fungicides, which are essential for protecting crops from pests and diseases. Additionally, it is utilized in the development of high-performance pigments and dyes, contributing to the coloration of textiles, plastics, and coatings. Its chemical properties make it valuable in research and industrial applications where precise molecular modifications are required for creating specialized chemical products.