Used as a key intermediate in the synthesis of azo-based dyes and pigments, particularly for textile and printing industries due to its ability to form stable, conjugated structures that impart strong color. Its carboxylic acid groups allow for coordination with metal ions, making it suitable for metal-organic frameworks (MOFs) with potential applications in sensing and catalysis. Also explored in photoresponsive materials because of the trans-cis isomerization of the azo group under light exposure, enabling use in optical switches and smart materials.