1. Pharmaceutical Raw Materials: Used as reference standards or intermediates in the synthesis of antihistamines, aiding in the development of drugs for treating allergies, urticaria, and other conditions. 2. Topical Medication Ingredients: Low-concentration preparations can be used to alleviate symptoms such as skin itching and eczema by reducing inflammatory responses through local action. 3. Emergency Care Applications: Serve as tool compounds in drug research and development for studying the pathogenesis of anaphylactic shock and evaluating the efficacy of emergency medications.