Used primarily as an intermediate in the synthesis of dyes, pesticides, and pharmaceuticals. It serves as a building block for the production of certain herbicides, antimicrobial agents, and antifungals. Also employed in the manufacture of phenolic resins and as a reagent in analytical chemistry for detecting enzymes like peroxidase due to its ability to form colored oxidation products. Its derivatives are found in some disinfectants, antiseptics, and cleaning products, leveraging its biocidal properties. Additionally, it is used in the paper and textile industries to prevent the growth of mold, fungi, and bacteria.