Neostigmine Impurity 4 CAS 19962-04-0

Description

Compared with other compounds in its class, the molecular weight of 180.20 g/mol gives Neostigmine Impurity 4 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Neostigmine Impurity 4 (CAS 19962-04-0), a pharmacopoeial impurity reference standard (molecular formula C9H12N2O2, MW 180.20 g/mol) used for the identification and quantification of trace impurities in APIs.

Structurally, Neostigmine Impurity 4 (C9H12N2O2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 180.20 g/mol, it falls into the medium-molecular-weight range. 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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