5-Chloroindole-2-carboxylic acid is primarily used in organic synthesis as a building block for the development of more complex chemical compounds. It serves as a key intermediate in the production of pharmaceuticals, particularly in the synthesis of drugs that target neurological and psychological disorders. Its indole structure makes it valuable in the creation of compounds that interact with serotonin receptors, which are crucial for mood regulation and mental health. Additionally, this chemical is utilized in the research and development of agrochemicals, where it contributes to the creation of new pesticides and herbicides. Its versatility in chemical reactions also makes it a useful component in the study of organic chemistry and the development of novel materials.