Naproxen Impurity 35 CAS CATO-C4X-170835

Purity 95%In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-170835
Molecular FormulaC17H20O5
Molecular Weight304.34 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Naproxen Impurity 35 CAS CATO-C4X-170835 chemical structure

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Naproxen Impurity 35.

CATO supplies Naproxen Impurity 35 (CAS CATO-C4X-170835), a pharmacopoeial impurity reference standard (molecular formula C17H20O5, MW 304.34 g/mol) used for the identification and quantification of trace impurities in APIs.

Naproxen Impurity 35 (C17H20O5) 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.

As a certified reference material (CRM), Naproxen Impurity 35 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC17H20O5
Molecular Weight304.34 g/mol
AppearancePale yellow to yellow crystalline powder
Purity95%
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)8.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present

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