Used as an intermediate in the synthesis of dyes and pharmaceuticals, particularly in the production of triarylmethane dyes and photochromic compounds. It serves as a building block in organic reactions where aldehyde functionality allows for condensation and nucleophilic addition, enabling the formation of more complex aromatic structures. Its secondary amine group enhances electron-donating properties, making it valuable in the development of sensors and optoelectronic materials. Also employed in research for developing novel amine-responsive reagents and in the preparation of fluorescent probes due to its favorable reactivity and structural characteristics.