L-ARGININE:HCL (13C6; 15N4) is a stable-isotope-labeled free amino acid salt in which L-arginine is present as the hydrochloride, providing a guanidinium-bearing side chain characteristic of the arginine class. The molecule contains an α-amino group and a carboxyl group on the amino acid backbone, while the side-chain guanidinium functionality is enriched with 13C6 and 15N4 labels to enable isotopic tracking, and the salt form associates the basic guanidinium with chloride. In synthetic and analytical workflows, the labeled arginine hydrochloride is employed as an isotopic tracer and reference material for mass spectrometry and NMR-based quantification, as well as for preparing labeled amino acid and peptide derivatives in structure-activity and labeling studies.
CAT No: L-Iso-0089
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