Siccanin is primarily used as an antifungal agent, particularly effective against dermatophytes, which are fungi that cause skin infections. It is applied topically to treat conditions like athlete's foot, ringworm, and other fungal skin infections. The compound works by inhibiting the growth of fungal cells, making it a valuable treatment in dermatological formulations. Its efficacy and relatively low toxicity make it a preferred choice in antifungal creams and ointments. Additionally, siccanin has been explored for its potential in agricultural applications to protect crops from fungal diseases, though this use is less common compared to its medical applications.