L-Lysyl-L-methionine--formic acid (1/1) CAS 103404-63-3

Description

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

L-Lysyl-L-methionine--formic acid (1/1) (CAS 103404-63-3) is a high-purity analytical reference standard with the molecular formula C11H23N3O3SCH2O2 and a molecular weight of 323.41 g/mol.

Based on its molecular formula C11H23N3O3SCH2O2, L-Lysyl-L-methionine--formic acid (1/1) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 323.41 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

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