Leflunomide Impurity 7 CAS 88511-40-4

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.88511-40-4
Molecular FormulaC5H5NO3
Molecular Weight127.10 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Leflunomide Impurity 7 CAS 88511-40-4 chemical structure

Description

CATO manufactures Leflunomide Impurity 7 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.

Leflunomide Impurity 7 (CAS 88511-40-4) is a certified pharmaceutical impurity reference standard with the molecular formula C5H5NO3 and a molecular weight of 127.10 g/mol.

Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Leflunomide Impurity 7 is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 127.10 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 FormulaC5H5NO3
Molecular Weight127.10 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO, water
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)4.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1982
Nitrogen Atoms1

Related Leflunomide Standards

Recommended Standards

Why CATO?