Category
Sildenafil
CAS Number
1357931-55-5
Molecular Formula
C17H20N4O5S
Molecular Weight
392.43
Synonym

4-ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1Hpyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonic acid; Benzenesulfonic acid, 3-(6,7-dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxy; 3-(6,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxybenzenesulfonic Acid

Keywords
Fine Chemicals
Pharmaceutical Standards
Aromatic
Impurities
Heterocycles
Intermediates
Slide 1.GIF

Sildenafil Impurity-D is a certified reference standard used in the quality control and impurity profiling of Sildenafil. It supports analytical method validation, stability studies, and regulatory compliance in pharmaceutical development.