Leflunomide Impurity 21 CAS 202057-74-7

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.202057-74-7
Molecular FormulaC12H9N3O2
Molecular Weight227.22 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Leflunomide Impurity 21 CAS 202057-74-7 chemical structure

Description

CATO supplies Leflunomide Impurity 21 (CAS 202057-74-7), a pharmacopoeial impurity standards reference standard manufactured under ISO 17034 accreditation. Molecular formula: C12H9N3O2. Molecular weight: 227.22 g/mol. Batch-specific COA and technical support are available on request.

Physical & Chemical Properties

Molecular FormulaC12H9N3O2
Molecular Weight227.22 g/mol
AppearancePale yellow to yellow crystalline powder
Purity>95%
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)10.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2014
Nitrogen Atoms3

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