Epalrestat Impurity 24 CAS CATO-C4X-223624

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-223624
Molecular FormulaC3H3NO2S2
Molecular WeightN/A
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Epalrestat Impurity 24 CAS CATO-C4X-223624 chemical structure

Description

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.

Epalrestat Impurity 24 (CAS CATO-C4X-223624) is a certified pharmaceutical impurity reference standard with the molecular formula C3H3NO2S2H4N and a molecular weight of 167.22 g/mol.

Epalrestat Impurity 24 (C3H3NO2S2H4N) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.

Physical & Chemical Properties

Molecular FormulaC3H3NO2S2 2*H4N
Molecular Weight167.22 g/mol
Purity>95%
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityLight-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)1.5
Nitrogen Atoms2
Sulfur Atoms2

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