6-Chloroindole-2-carboxylic acid is primarily utilized in organic synthesis as a versatile intermediate for the production of more complex chemical compounds. Its structure is particularly valuable in pharmaceutical research, where it serves as a building block for the development of potential drug candidates. The compound is often employed in the synthesis of indole derivatives, which are known for their biological activities, including anti-inflammatory, antimicrobial, and anticancer properties. Additionally, it is used in the development of agrochemicals, where indole-based compounds play a role in creating pesticides and herbicides. Its chloro and carboxylic acid functional groups make it a reactive site for further chemical modifications, enabling the creation of diverse molecules for various industrial applications. Researchers also explore its potential in material science, particularly in the design of organic electronic materials due to its conjugated indole system.