Acetylcysteine Impurity 11 CAS 79560-92-2

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Acetylcysteine Impurity 11.

CATO supplies Acetylcysteine Impurity 11 (CAS 79560-92-2), a pharmacopoeial impurity reference standard (molecular formula C5H9NO6S, MW 211.19 g/mol) used for the identification and quantification of trace impurities in APIs.

Owing to a carbohydrate-derived structure, an amide group, a sulfone group, Acetylcysteine Impurity 11 is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 211.19 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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