Indobufen Impurity 43 CAS CATO-C4X-179243

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-179243
Molecular FormulaC20H23NO2
Molecular Weight309.40 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Indobufen Impurity 43 CAS CATO-C4X-179243 chemical structure

Description

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.

Indobufen Impurity 43 (CAS CATO-C4X-179243) is a certified pharmaceutical impurity reference standard with the molecular formula C20H23NO2 and a molecular weight of 309.40 g/mol.

Indobufen Impurity 43 (C20H23NO2) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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 FormulaC20H23NO2
Molecular Weight309.40 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)10.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
Nitrogen Atoms1

Related Indobufen Standards

Recommended Standards

Why CATO?