Calcitonin Impurity 18 CAS CATO-C4X-221818

Description

Compared with other compounds in its class, the molecular weight of 258.33 g/mol gives Calcitonin Impurity 18 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Calcitonin Impurity 18 (CAS CATO-C4X-221818) is a certified pharmaceutical impurity reference standard with the molecular formula C12H18O4S and a molecular weight of 258.33 g/mol.

Calcitonin Impurity 18 (C12H18O4S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. 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.

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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