Zolpidem USP RC A（Zolpidem EP Impurity A） CAS 1346600-85-8

Description

Compared with other compounds in its class, the molecular weight of 307.39 g/mol gives Zolpidem USP RC A（Zolpidem EP Impurity A） distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Zolpidem USP RC A（Zolpidem EP Impurity A） (CAS 1346600-85-8) is a certified pharmaceutical impurity reference standard with the molecular formula C19H21N3O and a molecular weight of 307.39 g/mol.

Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, Zolpidem USP RC A（Zolpidem EP Impurity A） is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 307.39 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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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