Cas No:
171599-83-0
Mol.Wt:
474.6 : 192.1 g/mol
M.F:
C22H30N6O4S : C6H8O7
Chemical Name:
Impurities
Sildenafil Impurity D
4-Ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzene-1-sulfonic acid,Desmethylpiperazinyl Sildenafil Sulfonic Acid
Cas no:
1357931-55-5
Mol.Wt:
1357931-55-5
M.F:
C17H20N4O5S
Off White Powder
Sildenafil Impurity D
Cas No:
1357931-55-5
Sildenafil Impurity A
Sildenafil Related Compound A ; Sildenafil Isobutyl Analog,5-[2-Ethoxy-5-(4-methylpiperazine-1-sulfonyl)phenyl]-1-methyl-3-(2-methylpropyl)-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
Cas no:
1391053-95-4
Mol.Wt:
1391053-95-4
M.F:
C23H32N6O4S
White to off-white solid
Sildenafil Impurity A
Cas No:
1391053-95-4
Sildenafil Impurity B
Sildenafil N-Oxide,1-Methyl-4-[4-ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzene-1-sulfonyl]piperazine 1-oxide (as per EP) ; 1-{[3-(6,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulfonyl}-4-methylpiperazine N4-oxide
Cas no:
1094598-75-0
Mol.Wt:
1094598-75-0
M.F:
C22H30N6O5S
White Solid
Sildenafil Impurity B
Cas No:
1094598-75-0
Sildenafil Impurity C
5-[2-hydroxy-5-(4-methylpiperazine-1-sulfonyl)phenyl]-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one,O-Desethyl Sildenafil
Cas no:
139755-91-2
Mol.Wt:
139755-91-2
M.F:
C20H26N6O4S
White Powder
Sildenafil Impurity C
Cas No:
139755-91-2
Sildenafil Impurity E
1H-imidazole
Cas no:
288-32-4
Mol.Wt:
288-32-4
M.F:
C3H4N2
White to pale yellow powder
Sildenafil Impurity E
Cas No:
288-32-4
