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 as a pH indicator in laboratory settings due to its color change in different pH environments. Also utilized in biochemical assays to measure enzyme activity, particularly in studies involving phosphatases and esterases. Found in some disinfectants and preservatives, though its use is limited due to toxicity concerns. Additionally, used in environmental laboratories to study the adsorption and degradation of pollutants, and as a standard in analyzing contaminants in water and soil.