Fmoc-1,6-diaminohexane is widely used in peptide synthesis as a protecting group for amino acids. The Fmoc group is particularly valuable because it can be easily removed under mild basic conditions, making it ideal for solid-phase peptide synthesis. This compound serves as a linker or spacer in the construction of complex peptides, enabling the stepwise addition of amino acids without unwanted side reactions. Additionally, it is employed in the development of peptide-based drugs, biomaterials, and diagnostic tools due to its stability and compatibility with various chemical processes. Its role in facilitating precise and efficient peptide assembly makes it a critical reagent in both research and industrial applications.