L-ARGININE:HCL (GUANIDO-15N2+) is an L-arginine amino acid hydrochloride in which the guanidinium group carries two 15N isotopic labels, classifying it as a naturally occurring, basic, proteinogenic amino acid derivative. The molecule contains an α-amino group and a carboxyl group alongside an isotopically labeled guanidinium side chain that bears a delocalized positive charge under typical conditions, with the hydrochloride providing chloride counterion association for salt formation while retaining the amino acid framework. In research and analytical workflows, the labeled guanidinium enables isotopic tracing and mass spectrometry-based quantification of arginine-containing species, and it can be used as a defined substrate or building block for preparing labeled amino acid and peptide derivatives for structure-function and labeling studies.
CAT No: L-Iso-0082
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