Used as an intermediate in the synthesis of azo dyes and pigments, particularly for high-performance colorants in inks and coatings. It also serves in the development of photochromic materials due to its ability to undergo reversible light-induced structural changes. Additionally, it finds use in analytical chemistry as a chromogenic reagent for metal ion detection, especially for copper and iron, forming colored complexes that aid in spectrophotometric analysis. Its Schiff base structure makes it valuable in coordination chemistry for designing metal-organic frameworks and catalysts.