2-Chloroterephthalic acid is primarily utilized in the synthesis of advanced materials, particularly in the production of polymers and liquid crystals. It serves as a key intermediate in the manufacture of high-performance polyesters and polyamides, which are essential in creating fibers, films, and engineering plastics with enhanced thermal and mechanical properties. Additionally, it is employed in the development of organic semiconductors and optoelectronic materials, contributing to the fabrication of devices like organic light-emitting diodes (OLEDs) and photovoltaic cells. Its role in fine chemical synthesis also extends to the preparation of pharmaceutical intermediates and agrochemicals, where its structural properties enable the creation of biologically active compounds.