Benzoic Acid impurity 5 CAS CATO-C4X-28455

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-28455
Molecular FormulaC20H16O8
Molecular Weight384.34 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Benzoic Acid impurity 5 CAS CATO-C4X-28455 chemical structure

Description

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.

CATO supplies Benzoic Acid impurity 5 (CAS CATO-C4X-28455), a pharmacopoeial impurity reference standard (molecular formula C20H16O8, MW 384.34 g/mol) used for the identification and quantification of trace impurities in APIs.

Owing to a flavonoid core, a hydroxyl group, an ether linkage, Benzoic Acid impurity 5 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 384.34 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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.

Physical & Chemical Properties

Molecular FormulaC20H16O8
Molecular Weight384.34 g/mol
AppearancePale yellow to yellow crystalline powder
Purity97%+
StorageStore at 2-8°C, 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

Related Benzoic Standards

Recommended Standards

Why CATO?