Faropenem Impurity 42（Oxalyl chloride） CAS 79-37-8

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.79-37-8
Molecular FormulaC2Cl2O2
Molecular Weight126.93 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Faropenem Impurity 42（Oxalyl chloride） CAS 79-37-8 chemical structure

Description

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.

Faropenem Impurity 42（Oxalyl chloride） (CAS 79-37-8) is a certified pharmaceutical impurity reference standard with the molecular formula C2Cl2O2 and a molecular weight of 126.93 g/mol.

Faropenem Impurity 42（Oxalyl chloride） (C2Cl2O2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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 FormulaC2Cl2O2
Molecular Weight126.93 g/mol
Purity>95%
StorageStore at 2-8°C, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityStable under recommended storage conditions
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1957
Halogen ContentCl-containing

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