HAE is widely used in the field of organic synthesis as a versatile reagent. It plays a crucial role in the preparation of various pharmaceutical intermediates, particularly in the synthesis of active pharmaceutical ingredients (APIs). Its application extends to the production of specialty chemicals, where it acts as a key component in the development of complex molecules. Additionally, HAE is utilized in research laboratories for its ability to facilitate specific chemical reactions, making it valuable for the study of reaction mechanisms and the development of new synthetic pathways. In industrial settings, it is often employed in the manufacture of fine chemicals and agrochemicals, contributing to the production of crop protection agents and other agricultural products. Its effectiveness in these applications is attributed to its unique chemical properties, which enable precise control over reaction outcomes.