This chemical is widely used in photochromic applications, particularly in the production of lenses that darken upon exposure to UV light. It is incorporated into eyeglasses and sunglasses to provide adaptive vision protection, automatically adjusting to varying light conditions. Additionally, it is utilized in smart windows, which can change their transparency based on sunlight intensity, enhancing energy efficiency in buildings. The compound is also employed in optical data storage systems, where its light-sensitive properties enable high-density information recording. In the field of security, it is used in inks for anti-counterfeiting measures, as its color-changing ability under UV light helps verify the authenticity of documents and products.