Guaiacol is widely used in the pharmaceutical industry as an expectorant in cough syrups and other respiratory medications, helping to loosen mucus and ease breathing. It is also employed as a precursor in the synthesis of various drugs, including certain antibiotics and analgesics. In the food and flavoring industry, guaiacol is utilized to impart a smoky or woody aroma to products like barbecue sauces, smoked meats, and certain beverages. Additionally, it serves as a key component in the production of vanillin, a popular flavoring agent. In the field of organic chemistry, guaiacol is used as a reagent and intermediate in the synthesis of complex molecules. Its antioxidant properties also make it valuable in some industrial applications, such as stabilizing certain materials against oxidative degradation. Furthermore, in the perfume and cosmetics industry, guaiacol contributes unique smoky and phenolic scents.