Cefmenoxime Impurity 2 CAS 66340-45-2

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.66340-45-2
Molecular FormulaC16H17N9O5S3
Molecular Weight511.56 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Cefmenoxime Impurity 2 CAS 66340-45-2 chemical structure

Description

Cefmenoxime Impurity 2 (CAS 66340-45-2) is a certified pharmaceutical impurity reference standard with the molecular formula C16H17N9O5S3 and a molecular weight of 511.56 g/mol.

Cefmenoxime Impurity 2 (C16H17N9O5S3) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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), Cefmenoxime Impurity 2 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 FormulaC16H17N9O5S3
Molecular Weight511.56 g/mol
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)13.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1975
Nitrogen Atoms9
Sulfur Atoms3

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