Ibuprofen Impurity 161 CAS 1928708-57-9

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.1928708-57-9
Molecular FormulaC26H28O2
Molecular Weight372.50 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Ibuprofen Impurity 161 CAS 1928708-57-9 chemical structure

Description

CATO manufactures Ibuprofen Impurity 161 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

CATO supplies Ibuprofen Impurity 161 (CAS 1928708-57-9), a pharmacopoeial impurity reference standard (molecular formula C26H28O2, MW 372.50 g/mol) used for the identification and quantification of trace impurities in APIs.

The molecular framework of Ibuprofen Impurity 161 (C26H28O2) is characterized by a steroid core, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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 FormulaC26H28O2
Molecular Weight372.50 g/mol
AppearancePale yellow to yellow crystalline powder
Purity97%+
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
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
CAS Registry Year (est.)1996

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