Used as an intermediate in the synthesis of dyes and pigments, particularly azo dyes, due to its ability to undergo diazotization and coupling reactions. Plays a role in the preparation of pharmaceuticals, including certain antimicrobial and anti-inflammatory agents. Employed in the development of Schiff bases, which have applications in coordination chemistry and as ligands in catalysis. Also utilized in the production of optical brighteners and fluorescent probes for biological imaging. Its aldehyde and amine functional groups allow for versatile chemical modifications in organic synthesis.