2-Chloroisophthalic acid is primarily used as an intermediate in the synthesis of various organic compounds. It plays a significant role in the production of polymers and resins, where it contributes to enhancing thermal stability and mechanical properties. This chemical is also utilized in the development of specialty chemicals, including dyes and pigments, due to its ability to introduce specific functional groups into complex molecules. Additionally, it finds application in pharmaceutical research, where it serves as a building block for the synthesis of active pharmaceutical ingredients (APIs) and other biologically active compounds. Its reactivity and structural features make it valuable in material science for creating advanced materials with tailored properties.