N-Acetyl-DL-cysteine CAS 7218-04-4

Purity 97%+In StockPharmaceutical Standards
CAS No.7218-04-4
Molecular FormulaC5H9NO3S
Molecular Weight163.19 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

N-Acetyl-DL-cysteine CAS 7218-04-4 chemical structure

Description

CATO supplies N-Acetyl-DL-cysteine (CAS 7218-04-4), a certified reference material (molecular formula C5H9NO3S, MW 163.19 g/mol) for analytical method development and quality control.

Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, N-Acetyl-DL-cysteine is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 163.19 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.

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

Molecular FormulaC5H9NO3S
Molecular Weight163.19 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.)1959
Nitrogen Atoms1
Sulfur Atoms1

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