Catechol solution is widely used in organic synthesis as a key intermediate in the production of pharmaceuticals, agrochemicals, and fragrances. It serves as a building block for the synthesis of L-DOPA, a drug used in the treatment of Parkinson’s disease. In photography and imaging, it acts as a developing agent in black-and-white developers due to its ability to reduce silver halides. It is also employed in the preparation of antioxidants and stabilizers for polymers, rubber, and fuels, where it helps prevent degradation caused by oxidation. In research laboratories, catechol is used in the study of enzyme inhibitors, particularly tyrosinase and catechol-O-methyltransferase (COMT), which are relevant in neurological and metabolic research. Additionally, catechol solutions find application in electrochemistry and sensor development, especially in modifying electrode surfaces for detecting biomolecules and environmental pollutants. Its redox properties make it useful in studies involving electron transfer processes.