Used primarily as an analytical reference standard in pharmaceutical research and quality control testing. It enables accurate quantification and identification of mabuterol and related compounds in biological samples or formulations using techniques like HPLC and mass spectrometry. The methanol solution format ensures stability and ease of handling in laboratory settings, making it suitable for calibration of instruments and validation of analytical methods. Commonly applied in studies involving beta-2 agonists for respiratory conditions, supporting drug development and metabolic research.