N-Boc-L-phenylalanine dicyclohexylamine salt is a protected amino acid derivative. It consists of L-phenylalanine with its α-amino group protected by a tert-butoxycarbonyl (Boc) group, forming a salt with dicyclohexylamine (DCHA). This salt form enhances the compound's crystallinity and stability, making it easier to handle and purify compared to the free acid form. This compound is a crucial building block in solid-phase peptide synthesis (SPPS) and solution-phase peptide chemistry. The Boc protecting group is stable under basic conditions and can be selectively removed under mild acidic conditions (e.g., using trifluoroacetic acid), allowing for the sequential assembly of peptide chains. L-Phenylalanine is a common hydrophobic amino acid residue found in many biologically active peptides and proteins. Therefore, this Boc-protected salt is widely used in the research and development of peptide-based pharmaceuticals, diagnostic agents, and biochemical tools. The dicyclohexylamine salt offers advantages in purification processes due to its well-defined crystalline properties. It is a standard, high-purity reagent supplied for laboratory and industrial-scale synthesis. Proper handling is required as with all fine chemicals, including the use of personal protective equipment to avoid inhalation or contact.