Firocoxib Impurity 2 CAS CATO-C4X-32112

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-32112
Molecular FormulaC17H22O5S
Molecular Weight338.42 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Firocoxib Impurity 2 CAS CATO-C4X-32112 chemical structure

Description

This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.

Firocoxib Impurity 2 (CAS CATO-C4X-32112) is a certified pharmaceutical impurity reference standard with the molecular formula C17H22O5S and a molecular weight of 338.42 g/mol.

The molecular framework of Firocoxib Impurity 2 (C17H22O5S) is characterized by a flavonoid core, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional 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 FormulaC17H22O5S
Molecular Weight338.42 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)7.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
Sulfur Atoms1

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