Tadalafil Impurity 21 CAS 951661-85-1

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.951661-85-1
Molecular FormulaC20H19N3O3
Molecular Weight349.38 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Tadalafil Impurity 21 CAS 951661-85-1 chemical structure

Description

High-purity Tadalafil Impurity 21 (CAS 951661-85-1) pharmacopoeial impurity standards reference standard. Molecular formula: C20H19N3O3. Molecular weight: 349.38 g/mol. Produced by CATO, one of China's leading reference material manufacturers, with COA documentation and global shipping.

Physical & Chemical Properties

Molecular FormulaC20H19N3O3
Molecular Weight349.38 g/mol
AppearancePale yellow to yellow crystalline powder
Purity97%+
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)13.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1987
Nitrogen Atoms3

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