Diosmin EP Impurity B CAS 520-26-3

Purity >90%In StockPharmacopoeial Impurity Standards
CAS No.520-26-3
Molecular FormulaC28H34O15
Molecular Weight610.56 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Diosmin EP Impurity B CAS 520-26-3 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 610.56 g/mol gives Diosmin EP Impurity B distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Diosmin EP Impurity B (CAS 520-26-3) is a certified pharmaceutical impurity reference standard with the molecular formula C28H34O15 and a molecular weight of 610.56 g/mol.

Diosmin EP Impurity B (C28H34O15) contains a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

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 FormulaC28H34O15
Molecular Weight610.56 g/mol
Purity>90%
StorageStore at room temperature, protect from light, keep sealed and dry
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)12.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1957

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