Used in pharmaceutical formulations as an intermediate or active ingredient in the development of respiratory medications, particularly for treating asthma and chronic obstructive pulmonary disease (COPD). It functions as a beta-adrenergic receptor agonist, helping to relax bronchial smooth muscle, thereby improving airflow. Its fluorinated structure enhances metabolic stability and receptor selectivity, contributing to prolonged duration of action and reduced side effects. Commonly formulated in inhalers for targeted delivery to the lungs.