Used as a pH indicator in biochemical and environmental testing due to its color change in different pH environments. Commonly employed in enzyme activity assays, especially for monitoring phosphatase and esterase reactions where it acts as a chromogenic substrate. Its yellow color development under alkaline conditions allows for easy spectrophotometric detection. Also utilized in the synthesis of dyes, pharmaceuticals, and agrochemicals as an intermediate. In environmental studies, it serves as a model pollutant for testing degradation methods like photocatalysis and bioremediation.