Baricitinib Impurity 79 CAS CATO-C4X-226079

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-226079
Molecular FormulaC5H9NO4S
Molecular Weight179.19 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Baricitinib Impurity 79 CAS CATO-C4X-226079 chemical structure

Description

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.

CATO supplies Baricitinib Impurity 79 (CAS CATO-C4X-226079), a pharmacopoeial impurity reference standard (molecular formula C5H9NO4S, MW 179.19 g/mol) used for the identification and quantification of trace impurities in APIs.

The molecular framework of Baricitinib Impurity 79 (C5H9NO4S) is characterized by a carbohydrate-derived structure, an amide group, a sulfone group. 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.

Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.

Physical & Chemical Properties

Molecular FormulaC5H9NO4S
Molecular Weight179.19 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
Nitrogen Atoms1
Sulfur Atoms1

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