N3-L-Leu-OH (BHA) is utilized as a reagent in click chemistry. Known for its potential in linking nucleic acids, lipids, proteins, and various other molecules, click chemistry is favored in numerous research areas due to its high yield, specificity, and simplicity. The compound features an Azide group, enabling it to participate in copper-catalyzed azide-alkyne cycloaddition reactions (CuAAC) with molecules containing Alkyne groups. Additionally, it can engage in strain-promoted azide-alkyne cycloaddition reactions (SPAAC) with molecules bearing DBCO or BCN groups.