This Fmoc-protected trans-4-aminocyclohexylamine hydrochloride is primarily used as a building block in the field of peptide synthesis. The (9H-fluoren-9-yl)methyl (Fmoc) group protects one of the amine functions, providing stability under basic conditions and facile removal under mild acidic conditions in solid-phase peptide synthesis (SPPS). The free amine (as hydrochloride salt) enables selective coupling reactions. The trans-4-aminocyclohexyl moiety enhances the solubility and handling properties of the compound, making it suitable for automated peptide synthesizers. It is widely applied in the production of pharmaceuticals, bioactive peptides, and research reagents, ensuring high purity and yield in the synthesis process. Additionally, its hydrochloride salt form improves stability and shelf life, making it convenient for storage and use in laboratory settings.