Febuxostat Impurity 93 CAS CATO-C4X-116293

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-116293
Molecular FormulaC16H17NO4S
Molecular Weight319.38 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Febuxostat Impurity 93 CAS CATO-C4X-116293 chemical structure

Description

Febuxostat Impurity 93 (CAS CATO-C4X-116293) is a certified pharmaceutical impurity reference standard with the molecular formula C16H17NO4S and a molecular weight of 319.38 g/mol.

Febuxostat Impurity 93 (C16H17NO4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.

As a certified reference material (CRM), Febuxostat Impurity 93 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 FormulaC16H17NO4S
Molecular Weight319.38 g/mol
Purity97%+
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)9.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
Nitrogen Atoms1
Sulfur Atoms1

Related Febuxostat Standards

Recommended Standards

Why CATO?