Candesartan Cilexetil EP Impurity G(Candesartan) CAS 139481-59-7

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.139481-59-7
Molecular FormulaC24H20N6O3
Molecular Weight440.45 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Candesartan Cilexetil EP Impurity G(Candesartan) CAS 139481-59-7 chemical structure

Description

Candesartan Cilexetil EP Impurity G(Candesartan) (CAS 139481-59-7) is a certified pharmaceutical impurity reference standard with the molecular formula C24H20N6O3 and a molecular weight of 440.45 g/mol.

Structurally, Candesartan Cilexetil EP Impurity G(Candesartan) (C24H20N6O3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 18.0, corresponding to approximately 18 ring(s) or double-bond equivalent(s). With a molecular weight of 440.45 g/mol, it falls into the moderately-high-molecular-weight range. 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.

As a certified reference material (CRM), Candesartan Cilexetil EP Impurity G(Candesartan) 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 FormulaC24H20N6O3
Molecular Weight440.45 g/mol
AppearancePale yellow to yellow crystalline powder
Purity>95%
StorageStore in a cool place (≤25°C), protect from light, keep sealed and dry
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)18.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1996
Nitrogen Atoms6

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