Azithromycin impurity 55 CAS 944124-75-8

Description

Compared with other compounds in its class, the molecular weight of 746.97 g/mol gives Azithromycin impurity 55 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Azithromycin impurity 55 (CAS 944124-75-8) is a certified pharmaceutical impurity reference standard with the molecular formula C38H70N2O12 and a molecular weight of 746.97 g/mol.

The molecular framework of Azithromycin impurity 55 (C38H70N2O12) 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.

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.

CATO manufactures Azithromycin impurity 55 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Physical & Chemical Properties

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