Parecoxib Impurity 26 CAS CATO-C4X-159126

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-159126
Molecular FormulaC16H13NO7S2
Molecular Weight395.41 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Parecoxib Impurity 26 CAS CATO-C4X-159126 chemical structure

Description

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.

Parecoxib Impurity 26 (CAS CATO-C4X-159126) is a certified pharmaceutical impurity reference standard with the molecular formula C16H13NO7S2 and a molecular weight of 395.41 g/mol.

The molecular framework of Parecoxib Impurity 26 (C16H13NO7S2) is characterized by a flavonoid core, an amide group, a sulfone 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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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 FormulaC16H13NO7S2
Molecular Weight395.41 g/mol
Purity>95%
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)11.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
Nitrogen Atoms1
Sulfur Atoms2

Related Parecoxib Standards

Recommended Standards

Why CATO?