Widely used as a chromogenic reagent in analytical chemistry, particularly for the detection and quantification of primary aromatic amines. It reacts selectively with such amines to form colored Schiff base compounds, enabling visual or spectrophotometric detection. Commonly employed in thin-layer chromatography (TLC) staining to visualize amine-containing compounds, including amino acids, peptides, and alkaloids. Also utilized in forensic science for developing latent fingerprints on porous surfaces due to its reactivity with amino acid residues in sweat. Its high sensitivity and distinct color change make it valuable in quality control and research settings involving amine detection.