Sitafloxacin impurity 59 CAS 1542764-78-2

Description

Compared with other compounds in its class, the molecular weight of 335.71 g/mol gives Sitafloxacin impurity 59 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Sitafloxacin impurity 59 (CAS 1542764-78-2) is a certified pharmaceutical impurity reference standard with the molecular formula C14H13ClF3NO3 and a molecular weight of 335.71 g/mol.

Sitafloxacin impurity 59 (C14H13ClF3NO3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, 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).

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.

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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