N-Acetyl-S-methyl-L-cysteine CAS 16637-59-5

Purity 97%+In StockPharmaceutical Standards
CAS No.16637-59-5
Molecular FormulaC6H11NO3S
Molecular Weight177.22 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

N-Acetyl-S-methyl-L-cysteine CAS 16637-59-5 chemical structure

Description

N-Acetyl-S-methyl-L-cysteine (CAS 16637-59-5) is a high-purity analytical reference standard with the molecular formula C6H11NO3S and a molecular weight of 177.22 g/mol.

The molecular framework of N-Acetyl-S-methyl-L-cysteine (C6H11NO3S) is characterized by an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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.

As a certified reference material (CRM), N-Acetyl-S-methyl-L-cysteine meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC6H11NO3S
Molecular Weight177.22 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO, water
StabilityLight-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1961
Nitrogen Atoms1
Sulfur Atoms1

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