Used as a key intermediate in the synthesis of fluorescent dyes and optical brighteners due to its ability to form highly conjugated structures upon further chemical modification. Commonly employed in the preparation of phthalocyanine dyes and other colorants used in textiles, coatings, and plastics. Also finds application in the development of chemiluminescent and electro-luminescent materials for sensors and organic light-emitting diodes (OLEDs). Its amine group allows for easy functionalization, making it valuable in pharmaceutical research for building complex heterocyclic systems.