Perylenedicarboxylic acid bis(2-methylpropyl) ester is primarily used as a fluorescent dye in various industrial and research applications. Its strong fluorescence and stability make it suitable for use in optical brighteners, enhancing the brightness of materials such as plastics, textiles, and paper. In the field of electronics, it is employed in organic light-emitting diodes (OLEDs) and other optoelectronic devices due to its efficient light emission properties. Additionally, it finds application in solar cells, where it helps improve energy conversion efficiency. The compound is also utilized in biological imaging and labeling, aiding in the visualization of cellular structures and processes under fluorescence microscopy. Its versatility and performance make it a valuable component in advanced materials and technologies.