4-Chloro-3-cyanobenzoic acid is primarily used as an intermediate in the synthesis of various pharmaceutical compounds. Its structure, featuring both a chloro and a cyano group, makes it a versatile building block in organic chemistry. It is often employed in the production of active pharmaceutical ingredients (APIs) for drugs targeting specific diseases, including anti-inflammatory and anti-cancer agents. Additionally, it serves as a precursor in the development of agrochemicals, such as herbicides and pesticides, due to its ability to introduce functional groups that enhance biological activity. In research, it is utilized in the study of chemical reactions and the development of new synthetic pathways, particularly in the field of medicinal chemistry.