Captopril EP Impurity G CAS 33325-40-5

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.33325-40-5
Molecular FormulaC6H10O3S
Molecular Weight162.21 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Captopril EP Impurity G CAS 33325-40-5 chemical structure

Description

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

Captopril EP Impurity G (CAS 33325-40-5) is a certified pharmaceutical impurity reference standard with the molecular formula C6H10O3S and a molecular weight of 162.21 g/mol.

Captopril EP Impurity G (C6H10O3S) contains 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.

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

Molecular FormulaC6H10O3S
Molecular Weight162.21 g/mol
Purity97%+
StorageStore at 2-8°C, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO, water
StabilityHygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1966
Sulfur Atoms1

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