Sildenafil Impurity 81 CAS 2640792-65-8

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.2640792-65-8
Molecular FormulaC20H26N4O5S
Molecular Weight434.51 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Sildenafil Impurity 81 CAS 2640792-65-8 chemical structure

Description

Sildenafil Impurity 81 (CAS 2640792-65-8) is a pharmacopoeial impurity standards certified reference material from CATO. Molecular formula: C20H26N4O5S. Molecular weight: 434.51 g/mol. ISO 17034 accredited production ensures traceable purity and reliable analytical results.

Physical & Chemical Properties

Molecular FormulaC20H26N4O5S
Molecular Weight434.51 g/mol
Purity97%+
StorageStore in a cool place (≤25°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.)2002
Nitrogen Atoms4
Sulfur Atoms1

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