Used primarily as a photochromic compound, this chemical changes color reversibly when exposed to ultraviolet light, making it suitable for applications in light-sensitive lenses, such as transition glasses. It is also employed in smart windows, optical switches, and security inks due to its rapid and stable color transition. Its spiropyran structure enables switching between colorless and colored forms, useful in data storage and molecular switches. Additionally, it finds use in sensors and bioimaging where reversible photoresponse is required.