Ritonavir Impurity 43 CAS CATO-C4X-175143

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-175143
Molecular FormulaC17H26N4OS2
Molecular Weight366.54 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Ritonavir Impurity 43 CAS CATO-C4X-175143 chemical structure

Description

Owing to a steroid core, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, Ritonavir Impurity 43 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 366.54 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).

As a process- or degradation-related impurity, Ritonavir Impurity 43 (CAS CATO-C4X-175143, C17H26N4OS2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.

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 FormulaC17H26N4OS2
Molecular Weight366.54 g/mol
Purity97%+
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)7.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
Nitrogen Atoms4
Sulfur Atoms2

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