（See C4X-100319）Azithromycin EP Impurity A (See C4X-100319) CAS CATO-C4X-10037

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-10037
Molecular FormulaC37H70N2O12
Molecular Weight734.96 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

（See C4X-100319）Azithromycin EP Impurity A (See C4X-100319) CAS CATO-C4X-10037 chemical structure

Description

As a certified reference material (CRM), （See C4X-100319）Azithromycin EP Impurity A (See C4X-100319) 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.

（See C4X-100319）Azithromycin EP Impurity A (See C4X-100319) (CAS CATO-C4X-10037) is a certified pharmaceutical impurity reference standard with the molecular formula C37H70N2O12 and a molecular weight of 734.96 g/mol.

The molecular framework of （See C4X-100319）Azithromycin EP Impurity A (See C4X-100319) (C37H70N2O12) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.

Physical & Chemical Properties

Molecular FormulaC37H70N2O12
Molecular Weight734.96 g/mol
Purity97%+
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)4.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
Nitrogen Atoms2

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