Fosfomycin Impurity 19 CAS 28423-96-3

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.28423-96-3
Molecular FormulaC7H15O4P
Molecular Weight194.17 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Fosfomycin Impurity 19 CAS 28423-96-3 chemical structure

Description

Fosfomycin Impurity 19 (C7H15O4P) contains a phosphate ester 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.

Fosfomycin Impurity 19 (CAS 28423-96-3) is a certified pharmaceutical impurity reference standard with the molecular formula C7H15O4P and a molecular weight of 194.17 g/mol.

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

Molecular FormulaC7H15O4P
Molecular Weight194.17 g/mol
Purity>95%
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)0.5
CAS Registry Year (est.)1965

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