Fmoc-1,6-diaminohexane is widely used in peptide synthesis. The Fmoc group protects one of the amino groups and 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.