Pirfenidone Impurity 14 CAS 51933-81-4

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.51933-81-4
Molecular FormulaC12H11NO
Molecular Weight185.22 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Pirfenidone Impurity 14 CAS 51933-81-4 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.

Pirfenidone Impurity 14 (CAS 51933-81-4) is a certified pharmaceutical impurity reference standard with the molecular formula C12H11NO and a molecular weight of 185.22 g/mol.

Based on its molecular formula C12H11NO, Pirfenidone Impurity 14 contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 185.22 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.

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 FormulaC12H11NO
Molecular Weight185.22 g/mol
Purity>95%
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)8.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1971
Nitrogen Atoms1

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