D-Arginine amide dihydrochloride is widely used in biochemical research, particularly in the study of peptide synthesis and modification. It serves as a crucial intermediate in the development of peptide-based drugs, where its structure aids in enhancing stability and bioavailability. This compound is also employed in the investigation of enzyme-substrate interactions, helping to elucidate mechanisms of action in various biological processes. Additionally, it plays a role in the development of diagnostic tools and therapeutic agents targeting specific protein interactions, making it valuable in both pharmaceutical and clinical research. Its applications extend to the study of nitric oxide pathways, where it helps in understanding cardiovascular and neurological functions.