L-ARGININE:HCL (GUANIDO-13C) is an isotopically labeled, free amino acid salt in which L-arginine is present as the hydrochloride and the guanidino carbon of the arginine side chain is enriched with 13C. The molecule contains an α-amino group and a carboxyl group on the amino acid backbone, while the side chain bears a guanidinium functionality that is strongly basic and typically protonated under acidic conditions, and the salt form balances charge with chloride. In biochemical and analytical workflows, the guanidino-13C label enables isotopic tracing and mass spectrometric or NMR-based studies of arginine-containing intermediates, and the free amino acid form supports its use as a labeled precursor for preparing more complex amino acid and peptide derivatives.
CAT No: L-Iso-0094
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