Ensitrelvir Impurity 4 HCl CAS 135206-76-7

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.135206-76-7
Molecular FormulaC4H6ClN3
Molecular WeightN/A
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Ensitrelvir Impurity 4 HCl CAS 135206-76-7 chemical structure

Description

Ensitrelvir Impurity 4 HCl (CAS 135206-76-7) is a certified pharmaceutical impurity reference standard with the molecular formula C4H6ClN3HCl and a molecular weight of 168.02 g/mol.

Based on its molecular formula C4H6ClN3HCl, Ensitrelvir Impurity 4 HCl contains a nitrile group, chlorine substitution; these features give the compound characteristic molecular-ion distribution patterns in mass spectrometry. The molecular weight of 168.02 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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 FormulaC4H6ClN3 HCl
Molecular Weight168.02 g/mol
Purity>95%
StorageStore at 2-8°C, protect from light, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1995
Halogen ContentCl-containing
Nitrogen Atoms3

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