Clemastine EP Impurity A(Mixture of Diastereomers) CAS 108825-05-4

Description

The occurrence of Clemastine EP Impurity A(Mixture of Diastereomers) is closely related to a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

Clemastine EP Impurity A(Mixture of Diastereomers) (CAS 108825-05-4) is a certified pharmaceutical impurity reference standard with the molecular formula C21H26ClNO2 and a molecular weight of 359.89 g/mol.

Based on its molecular formula C21H26ClNO2, Clemastine EP Impurity A(Mixture of Diastereomers) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 359.89 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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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