Leflunomide EP Impurity B-d4 (Teriflunomide-d4) CAS 1185240-22-5

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.1185240-22-5
Molecular FormulaC12H5D4F3N2O2
Molecular Weight274.23 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Leflunomide EP Impurity B-d4 (Teriflunomide-d4) CAS 1185240-22-5 chemical structure

Description

Leflunomide EP Impurity B-d4 (Teriflunomide-d4) (CAS 1185240-22-5) is a high-purity pharmacopoeial impurity standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C12H5D4F3N2O2. Molecular weight: 274.23 g/mol. Each batch is supplied with a Certificate of Analysis (COA).

Physical & Chemical Properties

Molecular FormulaC12H5D4F3N2O2
Molecular Weight274.23 g/mol
AppearancePale yellow to yellow crystalline powder. (slight halide-like odor, low volatility)
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry, 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)10.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1989
Halogen ContentF-containing
Nitrogen Atoms2

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