Aripiprazole Impurity 43 CAS CATO-C4X-100843

Description

The occurrence of Aripiprazole Impurity 43 is closely related to a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

Aripiprazole Impurity 43 (CAS CATO-C4X-100843) is a certified pharmaceutical impurity reference standard with the molecular formula C21H26Cl2N2O3S and a molecular weight of 457.41 g/mol.

Based on its molecular formula C21H26Cl2N2O3S, Aripiprazole Impurity 43 contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 457.41 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

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