Letrozole Impurity 34 CAS 2500927-63-7

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.2500927-63-7
Molecular FormulaC17H13N5O
Molecular Weight303.32 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Letrozole Impurity 34 CAS 2500927-63-7 chemical structure

Description

CATO manufactures Letrozole Impurity 34 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Letrozole Impurity 34 (CAS 2500927-63-7) is a certified pharmaceutical impurity reference standard with the molecular formula C17H13N5O and a molecular weight of 303.32 g/mol.

Based on its molecular formula C17H13N5O, Letrozole Impurity 34 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 303.32 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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 FormulaC17H13N5O
Molecular Weight303.32 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)14.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2000
Nitrogen Atoms5

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