Azathioprine Impurity 10 CAS 253453-91-7

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.253453-91-7
Molecular FormulaC4H5ClN2
Molecular Weight116.55 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Azathioprine Impurity 10 CAS 253453-91-7 chemical structure

Description

Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.

Azathioprine Impurity 10 (CAS 253453-91-7) is a certified pharmaceutical impurity reference standard with the molecular formula C4H5ClN2 and a molecular weight of 116.55 g/mol.

Owing to a nitrile group, chlorine substitution, Azathioprine Impurity 10 is typically white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 116.55 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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 FormulaC4H5ClN2
Molecular Weight116.55 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)3.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)2025
Halogen ContentCl-containing
Nitrogen Atoms2

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