Used as a key intermediate in the synthesis of fluorescent dyes and optical brighteners due to its extended conjugated system and halogen substitution that enhance photostability and light absorption properties. Commonly employed in the development of sensors for cation detection, especially for aluminum and zinc ions, where the compound acts as a fluorophore with turn-on response upon binding. Also found in research applications for organic electronics, including OLEDs, where it serves as a building block for emissive layers owing to its strong emission and electron-donating ability. Its styryl structure allows for fine-tuning of emission wavelengths, making it suitable for colorimetric and luminescent probes in biological imaging and environmental monitoring.