Pemirolast Impurity 3 CAS CATO-C4X-24703

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.CATO-C4X-24703
Molecular FormulaC10H7N3O
Molecular Weight185.18 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Pemirolast Impurity 3 CAS CATO-C4X-24703 chemical structure

Description

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.

Pemirolast Impurity 3 (CAS CATO-C4X-24703) is a certified pharmaceutical impurity reference standard with the molecular formula C10H7N3O and a molecular weight of 185.18 g/mol.

Based on its molecular formula C10H7N3O, Pemirolast Impurity 3 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 185.18 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).

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.

Physical & Chemical Properties

Molecular FormulaC10H7N3O
Molecular Weight185.18 g/mol
AppearancePale yellow to yellow crystalline powder. (faint amine-like odor)
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)9.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
Nitrogen Atoms3

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