Tetrachloroterephthalonitrile is primarily used in the synthesis of advanced materials and organic compounds. It serves as a key intermediate in the production of dyes and pigments, particularly those requiring high thermal and chemical stability. Additionally, it is utilized in the development of agrochemicals, where it contributes to the creation of herbicides and fungicides with enhanced efficacy. Its role in the manufacture of specialty polymers and resins is also notable, as it imparts desirable properties such as durability and resistance to degradation. Furthermore, it finds application in research and development for creating novel organic molecules with potential uses in pharmaceuticals and material science.