L-Lysine Dihydrochloride 13C is a stable isotope-labeled form of L-lysine, where carbon-13 (13C) is incorporated into the molecular structure. This compound is widely used as an internal standard in mass spectrometry and nuclear magnetic resonance (NMR) studies, ensuring precise quantification and metabolic pathway analysis. The dihydrochloride salt enhances solubility in aqueous solutions, facilitating its use in biochemical and pharmaceutical research. Its high isotopic purity and chemical stability make it ideal for tracer studies in proteomics, nutrition, and drug metabolism research. The labeled lysine derivative provides reliable data accuracy, supporting advanced research in isotope dilution and kinetic studies.