Prednisone Impurity 9 CAS 2435-02-1

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.2435-02-1
Molecular FormulaC23H28O6
Molecular Weight400.46 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Prednisone Impurity 9 CAS 2435-02-1 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.

Prednisone Impurity 9 (CAS 2435-02-1) is a certified pharmaceutical impurity reference standard with the molecular formula C23H28O6 and a molecular weight of 400.46 g/mol.

Prednisone Impurity 9 (C23H28O6) contains a flavonoid core, 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. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

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.

Physical & Chemical Properties

Molecular FormulaC23H28O6
Molecular Weight400.46 g/mol
AppearancePale yellow to yellow crystalline powder
Purity97%+
StorageStore at room temperature, 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)10.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1957

Related Prednisone Standards

Recommended Standards

Why CATO?