Sulfogaiacol is primarily used as an expectorant in the pharmaceutical industry. It helps in the treatment of respiratory conditions by thinning and loosening mucus in the airways, making it easier to cough up. This makes it effective in managing symptoms of bronchitis, asthma, and other respiratory tract infections. Additionally, it is sometimes included in cough syrups and cold medications to alleviate chest congestion and improve breathing. Its mucolytic properties make it a valuable component in formulations aimed at providing relief from persistent coughs and respiratory discomfort.