Sodium Cromoglicate Impurity 5 CAS CATO-C4X-20115

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-20115
Molecular FormulaC20H16O10
Molecular Weight416.34 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Sodium Cromoglicate Impurity 5 CAS CATO-C4X-20115 chemical structure

Description

Sodium Cromoglicate Impurity 5 (CAS CATO-C4X-20115) is a certified pharmaceutical impurity reference standard with the molecular formula C20H16O10 and a molecular weight of 416.34 g/mol.

Sodium Cromoglicate Impurity 5 (C20H16O10) contains a flavonoid core, a hydroxyl group, an ether linkage. 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 FormulaC20H16O10
Molecular Weight416.34 g/mol
AppearancePale yellow to yellow crystalline powder
Purity>95%
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)13.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present

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