4-Ethylcatechol is widely used in the synthesis of antioxidants and polymerization inhibitors, particularly in the production of rubber and plastics. It serves as a key intermediate in the manufacture of various industrial chemicals, including those used in coatings and adhesives. Additionally, it is employed in the development of pharmaceuticals, where it acts as a precursor in the synthesis of bioactive compounds. In the field of organic chemistry, it is utilized as a reagent for studying oxidation processes and enzymatic reactions. Its role in the production of flavoring agents and fragrances is also notable, contributing to the creation of complex aromatic profiles.