Used as a key intermediate in the synthesis of phthalimide-based compounds, particularly in pharmaceuticals and agrochemicals. It serves as a building block for preparing bioactive molecules due to its reactive imide and ester functionalities. Commonly employed in the development of herbicides, fungicides, and plant growth regulators. Also utilized in the preparation of dyes and fluorescent probes for biological imaging. Its stability and ease of functionalization make it valuable in medicinal chemistry for constructing heterocyclic scaffolds.