sildenafil and its Impurities

Sildenafil is used for the treatment of erectile dysfunction and pulmonary arterial hypertension. It is sold under the brand name of Viagra. Sildenafil inhibits an enzyme cGMP-specific phosphodiesterase type 5 that promotes degradation of cGMP, which regulates blood flow in the penis.Reference standards of Sildenafil API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

Displaying 26 results for sildenafil Impurities
PA 19 08000

Sildenafil - API

Sildenafil


  • Catalogue No.:PA 19 08000

  • CAS :

    139755-83-2

  • Molecular Formula : C22H30N6O4S

  • Molecular Weight : 474.58

PA STI 027470

O-Desethyl-O-propyl Methisosildenafil-d4

O-Desethyl-O-propyl Methisosildenafil-d4


  • Catalogue No.:PA STI 027470

  • CAS :

    NA

  • Molecular Formula : C24H30D4N6O4S

  • Molecular Weight : 506.65

PA STI 027480

Descarbonsildenafil-d6

Descarbonsildenafil-d6


  • Catalogue No.:PA STI 027480

  • CAS :

    NA

  • Molecular Formula : C21H24D6N6O4S

  • Molecular Weight : 468.60

PA STI 027500

Desethyl Sildenafil-d3

Desethyl Sildenafil-d3


  • Catalogue No.:PA STI 027500

  • CAS :

    1346603-75-5

  • Molecular Formula : C20H23D3N6O4S

  • Molecular Weight : 449.52

PA STI 028620

N-Desmethyl Sildenafil-d8

N-Desmethyl Sildenafil-d8


  • Catalogue No.:PA STI 028620

  • CAS :

    1185168-06-2

  • Molecular Formula : C21H20D8N6O4S

  • Molecular Weight : 468.60

PA STI 028630

N-Desmethyl-N-benzyl Sildenafil-d5

N-Desmethyl-N-benzyl Sildenafil-d5


  • Catalogue No.:PA STI 028630

  • CAS :

    NA

  • Molecular Formula : C28H29D5N6O4S

  • Molecular Weight : 555.70

PA STI 028770

Desmethyl Thiosildenafil-d8

Desmethyl Thiosildenafil-d8


  • Catalogue No.:PA STI 028770

  • CAS :

    1215321-44-0

  • Molecular Formula : C21H20D8N6O3S2

  • Molecular Weight : 484.66

PA STI 046860

Homo Sildenafil-d5

Homo Sildenafil-d5


  • Catalogue No.:PA STI 046860

  • CAS :

    1216711-61-3

  • Molecular Formula : C23H27D5N6O4S

  • Molecular Weight : 493.63

PA STI 054300

Iso Sildenafil-d3

Iso Sildenafil-d3


  • Catalogue No.:PA STI 054300

  • CAS :

    1794829-17-6

  • Molecular Formula : C22H27D3N6O4S

  • Molecular Weight : 477.59

PA STI 058600

Methisosildenafil-d4

Methisosildenafil-d4


  • Catalogue No.:PA STI 058600

  • CAS :

    1246819-66-8

  • Molecular Formula : C23H28D4N6O4S

  • Molecular Weight : 492.63

PA STI 073900

Piperazonifil-d5

Piperazonifil-d5


  • Catalogue No.:PA STI 073900

  • CAS :

    NA

  • Molecular Formula : C25H29D5N6O4

  • Molecular Weight : 487.61

PA STI 075440

Propoxyphenyl-thiosildenafil-d8

Propoxyphenyl-thiosildenafil-d8


  • Catalogue No.:PA STI 075440

  • CAS :

    NA

  • Molecular Formula : C23H24D8N6O3S2

  • Molecular Weight : 512.72

PA STI 076040

Pyrazole N-Demethyl Sildenafil-d3

Pyrazole N-Demethyl Sildenafil-d3


  • Catalogue No.:PA STI 076040

  • CAS :

    1185044-03-4

  • Molecular Formula : C21H25D3N6O4S

  • Molecular Weight : 463.57

PA STI 079220

Sildenafil-d3

Sildenafil-d3


  • Catalogue No.:PA STI 079220

  • CAS :

    1126745-90-1

  • Molecular Formula : C22H27D3N6O4S

  • Molecular Weight : 477.60

PA STI 079230

Sildenafil-d8

Sildenafil-d8


  • Catalogue No.:PA STI 079230

  • CAS :

    951385-68-5

  • Molecular Formula : C22H22D8N6O4S

  • Molecular Weight : 482.63

PA STI 082870

Thiosildenafil-d3

Thiosildenafil-d3


  • Catalogue No.:PA STI 082870

  • CAS :

    1216671-11-2

  • Molecular Formula : C22H27D3N6O3S2

  • Molecular Weight : 493.66

PAI 19 012010

4-Ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonyl Chloride

4-Ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonyl Chloride


  • Catalogue No.:PAI 19 012010

  • CAS :

    NA

  • Molecular Formula : C17H19ClN4O4S

  • Molecular Weight : 410.87

PA EPY0001578

Sildenafil citrate (Y0001578)


  • Catalogue No.:PA EPY0001578

  • CAS :

    NA

  • Molecular Formula :

  • Molecular Weight : NA

PA EPY0001579

Sildenafil impurity A (Y0001579)


  • Catalogue No.:PA EPY0001579

  • CAS :

    NA

  • Molecular Formula :

  • Molecular Weight : NA

PAI 19 012020

2,4-Dioxoheptanoic Acid Ethyl Ester


  • Catalogue No.:PAI 19 012020

  • CAS :

    36983-31-0

  • Molecular Formula : C9H14O4

  • Molecular Weight : 186.21

PAI 19 012030

Ethyl 1-methyl-5-propyl-1H-pyrazole-3-carboxylate


  • Catalogue No.:PAI 19 012030

  • CAS :

    247583-69-3

  • Molecular Formula : C10H16N2O2

  • Molecular Weight : 196.25

PAI 19 012040

1-Methyl-5-propyl-1H-pyrazole-3-carboxylic Acid


  • Catalogue No.:PAI 19 012040

  • CAS :

    247583-70-6

  • Molecular Formula : C8H12N2O2

  • Molecular Weight : 168.20

PAI 19 012050

1-Methyl-4-nitro-5-propyl-1H-pyrazole-3-carboxylic Acid


  • Catalogue No.:PAI 19 012050

  • CAS :

    247583-71-7

  • Molecular Formula : C8H11N3O4

  • Molecular Weight : 213.19

PAI 19 012060

1-Methyl-4-nitro-5-propyl-1H-pyrazole-3-carboxamide


  • Catalogue No.:PAI 19 012060

  • CAS :

    247583-72-8

  • Molecular Formula : C8H12N4O3

  • Molecular Weight : 212.21

PAI 19 012070

5-(2-Ethoxyphenyl)-2-methyl-3-propyl-2,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one


  • Catalogue No.:PAI 19 012070

  • CAS :

    NA

  • Molecular Formula : C17H20N4O2

  • Molecular Weight : 312.37

PAI 19 012080

2-(Benzyl(1-(4-methoxyphenyl)propan-2-yl)amino)-1-(4-(benzyloxy)-3-nitrophenyl)ethan-1-one

2-(Benzyl(1-(4-methoxyphenyl)propan-2-yl)amino)-1-(4-(benzyloxy)-3-nitrophenyl)ethan-1-one


  • Catalogue No.:PAI 19 012080

  • CAS :

    NA

  • Molecular Formula : C32H32N2O5

  • Molecular Weight : 524.62