Used as an intermediate in the synthesis of pharmaceuticals, dyes, and pesticides. Commonly employed in the production of paracetamol (acetaminophen) and other analgesics. Serves as a precursor in the manufacture of certain insecticides and herbicides. Applied in analytical chemistry as a pH indicator due to its color change in different pH environments. Also utilized in enzymatic assays to measure enzyme activity, especially in studies involving phosphatases and esterases, where its release can be easily monitored spectrophotometrically.