Epalrestat impurity 35 CAS CATO-C4X-223635

Description

Compared with other compounds in its class, the molecular weight of 271.36 g/mol gives Epalrestat impurity 35 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Epalrestat impurity 35 (CAS CATO-C4X-223635) is a certified pharmaceutical impurity reference standard with the molecular formula C11H13NO3S2 and a molecular weight of 271.36 g/mol.

Epalrestat impurity 35 (C11H13NO3S2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, 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.

CATO manufactures Epalrestat impurity 35 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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