2,3-Dioxoindoline-7-carboxylic acid is primarily used in organic synthesis as a key intermediate for the production of various biologically active compounds. It plays a significant role in the development of pharmaceuticals, particularly in the synthesis of indole-based drugs, which are known for their diverse therapeutic properties. This compound is also utilized in the research and development of potential treatments for neurological disorders, owing to its structural similarity to naturally occurring indole derivatives. Additionally, it serves as a building block in the creation of dyes and pigments, contributing to advancements in material science and industrial applications.