Ritonavir Impurity 58 CAS 172720-22-8

Purity ≥95%In StockPharmacopoeial Impurity Standards
CAS No.172720-22-8
Molecular FormulaC18H24N2O
Molecular Weight284.40 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Ritonavir Impurity 58 CAS 172720-22-8 chemical structure

Description

Based on its molecular formula C18H24N2O, Ritonavir Impurity 58 contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 284.40 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

CATO supplies Ritonavir Impurity 58 (CAS 172720-22-8), a pharmacopoeial impurity reference standard (molecular formula C18H24N2O, MW 284.40 g/mol) used for the identification and quantification of trace impurities in APIs.

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.

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 FormulaC18H24N2O
Molecular Weight284.40 g/mol
AppearancePale yellow to yellow crystalline powder
Purity≥95%
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)8.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2006
Nitrogen Atoms2

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