Sildenafil
22 Results Found
Page 1 of 1
Sildenafil API Reference standards and its EP Impurities, USP Impurities, non pharmacopeial Impurities, listed below & also offered custom synthesis for unknown Impurities. If require any contact info@drjcrbio.com, sales@drjcrbio.com
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Product Name : SILDENAFIL NITROAMIDE IMPURITY A ;1-Methyl-4-nitro-3-propyl-1H-pyrazole-5-carboxamide;139756-01-8
Code: JCSDF-22 CAS: 139756-01-7 Chemical Formula: C8H12N4O3 Molecular Weight: 212.21 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: SILDENAFIL NITROAMIDE IMPURITY A ;1-Methyl-4-nitro-3-propyl-1H-pyrazole-5-carboxamide;139756-01-8is useful as reference Impurity standard. 
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Product Name : SULPHONYL METHYL ESTER ;methyl 4-ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonate | 2512206-40-3
Code: JCSDF-21 CAS: 2512206-40-3 Chemical Formula: C18H22N4O5S Molecular Weight: 406.46 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: SULPHONYL METHYL ESTER ;methyl 4-ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonate | 2512206-40-3 is useful as reference Impurity standard. ![SULPHONYL METHYL ESTER ;methyl 4-ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonate | 2512206-40-3](https://drjcrbio.com/wp-content/uploads/2512206-40-3.png)
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Product Name : Sildenafil N-Desmethyl Thione Impurity ; Desmethyl Thiosildenafil ; 5-[2-Ethoxy-5-(1-piperazinylsulfonyl)phenyl]-1,6-dihydro-1-methyl-3-propyl- 7H-pyrazolo[4,3-d]pyrimidine-7-thione | 479073-86-4
Code:JCSDF-20 CAS: 479073-86-4 Chemical Formula: C21H28N6O3S2 Molecular Weight: 476.62 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil N-Desmethyl Thione Impurity ; Desmethyl Thiosildenafil ; 5-[2-Ethoxy-5-(1-piperazinylsulfonyl)phenyl]-1,6-dihydro-1-methyl-3-propyl- 7H-pyrazolo[4,3-d]pyrimidine-7-thione | 479073-86-4 is useful as reference Impurity standard. ![Sildenafil N-Desmethyl Thione Impurity ; Desmethyl Thiosildenafil ; 5-[2-Ethoxy-5-(1-piperazinylsulfonyl)phenyl]-1,6-dihydro-1-methyl-3-propyl- 7H-pyrazolo[4,3-d]pyrimidine-7-thione | 479073-86-4](https://drjcrbio.com/wp-content/uploads/s-1-4.png)
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Product Name : Sildenafil N-Desmethyl Metabolite ;N-Desmethyl Sildenafil ; 5-[2-Ethoxy-5-(piperazin-1-yl)sulfonylphenyl]-1-methyl-3-propyl-4H-pyrazolo[5,4-e]pyrimidin-7-one | 139755-82-1
Code:JCSDF-19 CAS: 139755-82-1 Chemical Formula: C21H28N6O4S Molecular Weight: 460.55 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil N-Desmethyl Metabolite ;N-Desmethyl Sildenafil ; 5-[2-Ethoxy-5-(piperazin-1-yl)sulfonylphenyl]-1-methyl-3-propyl-4H-pyrazolo[5,4-e]pyrimidin-7-one | 139755-82-1 is useful as reference Impurity standard. ![Sildenafil N-Desmethyl Metabolite ;N-Desmethyl Sildenafil ; 5-[2-Ethoxy-5-(piperazin-1-yl)sulfonylphenyl]-1-methyl-3-propyl-4H-pyrazolo[5,4-e]pyrimidin-7-one | 139755-82-1](https://drjcrbio.com/wp-content/uploads/s-2-4.png)
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Product Name : Sildenafil Lactam Impurity ; 5-(2-Ethoxyphenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazole[4,3-d]pyrimidine-7-one | 139756-21-1
Code: JCSDF-18 CAS: 139756-21-1 Chemical Formula: C17H20N4O2 Molecular Weight: 312.37 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil Lactam Impurity ; 5-(2-Ethoxyphenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazole[4,3-d]pyrimidine-7-one | 139756-21-1 is useful as reference Impurity standard. ![Sildenafil Lactam Impurity ; 5-(2-Ethoxyphenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazole[4,3-d]pyrimidine-7-one | 139756-21-1](https://drjcrbio.com/wp-content/uploads/s-3-4.png)
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Product Name : Sildenafil Isobutylpyrazolopyrimidine Impurity ; 3-(2-Methylpropyl)-1H-pyrazolo[4,3-d]pyrimidine | 1346600-82-5
Code: JCSDF-17 CAS: 1346600-82-5 Chemical Formula: C9H12N4 Molecular Weight: 176.22 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil Isobutylpyrazolopyrimidine Impurity ; 3-(2-Methylpropyl)-1H-pyrazolo[4,3-d]pyrimidine | 1346600-82-5 is useful as reference Impurity standard. ![Sildenafil Isobutylpyrazolopyrimidine Impurity ; 3-(2-Methylpropyl)-1H-pyrazolo[4,3-d]pyrimidine | 1346600-82-5](https://drjcrbio.com/wp-content/uploads/s-4-4.png)
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Product Name : Sildenafil EP Impurity D ;Desmethylpiperazinyl Sildenafil Sulfonic Acid ; 3-(4,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxybenzenesulfonic acid | 1357931-55-5
Code: JCSDF-16 CAS: 1357931-55-5 Chemical Formula: C17H20N4O5S Molecular Weight: 392.43 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil EP Impurity D ;Desmethylpiperazinyl Sildenafil Sulfonic Acid ; 3-(4,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxybenzenesulfonic acid | 1357931-55-5 is useful as reference Impurity standard. ![Sildenafil EP Impurity D ;Desmethylpiperazinyl Sildenafil Sulfonic Acid ; 3-(4,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxybenzenesulfonic acid | 1357931-55-5](https://drjcrbio.com/wp-content/uploads/s-e4.png)
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Product Name : Sildenafil EP Impurity C ; O-Desethyl Sildenafil ; 5-[2-Hydroxy-5-(4-methylpiperazinylsulphonyl)phenyl]1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyramidin-7-one | 139755-91-2
Code: JCSDF-15 CAS: 139755-91-2 Chemical Formula: C20H26N6O4S Molecular Weight: 446.52 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil EP Impurity C ; O-Desethyl Sildenafil ; 5-[2-Hydroxy-5-(4-methylpiperazinylsulphonyl)phenyl]1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyramidin-7-one | 139755-91-2 is useful as reference Impurity standard. ![Sildenafil EP Impurity C ; O-Desethyl Sildenafil ; 5-[2-Hydroxy-5-(4-methylpiperazinylsulphonyl)phenyl]1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyramidin-7-one | 139755-91-2](https://drjcrbio.com/wp-content/uploads/s-e3.png)
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Product Name : Sildenafil EP Impurity B ;Sildenafil N-Oxide ; 5-[2-Ethoxy-5-[(4-methyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one | 1094598-75-0
Code: JCSDF-14 CAS: 1094598-75-0 Chemical Formula: C22H30N6O5S Molecular Weight: 490.58 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil EP Impurity B ;Sildenafil N-Oxide ; 5-[2-Ethoxy-5-[(4-methyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one | 1094598-75-0 is useful as reference Impurity standard. ![Sildenafil EP Impurity B ;Sildenafil N-Oxide ; 5-[2-Ethoxy-5-[(4-methyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one | 1094598-75-0](https://drjcrbio.com/wp-content/uploads/s-e2.png)
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Product Name : Sildenafil EP Impurity A ; Sildenafil USP RC A ; Sildenafil Isobutyl Analog ; 5-[2-Ethoxy-5-[(4-methyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-(2-methylpropyl)-7H-pyrazolo[4,3-d]pyrimidin-7-one
Code: JCSDF-13 CAS: 1391053-95-4 Chemical Formula: C23H32N6O4S Molecular Weight:488.6 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil EP Impurity A ; Sildenafil USP RC A ; Sildenafil Isobutyl Analog ; 5-[2-Ethoxy-5-[(4-methyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-(2-methylpropyl)-7H-pyrazolo[4,3-d]pyrimidin-7-one is useful as reference Impurity standard. ![Sildenafil EP Impurity A ; Sildenafil USP RC A ; Sildenafil Isobutyl Analog ; 5-[2-Ethoxy-5-[(4-methyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-(2-methylpropyl)-7H-pyrazolo[4,3-d]pyrimidin-7-one](https://drjcrbio.com/wp-content/uploads/s-e1-1.png)
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Product Name : Sildenafil Disulfonamide Dimer Impurity ;5-{2 -Ethoxy-5-[(4-{[4-ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5yl) phenyl]sulfonyl}piperazino)sulfonyl]phenyl}-1-methyl-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-7–one | 1346602-67-2
Code: JCSDF-12 CAS: 1346602-67-2 Chemical Formula: C38H46N10O8S2 Molecular Weight: 834.96 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil Disulfonamide Dimer Impurity ;5-{2 -Ethoxy-5-[(4-{[4-ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5yl) phenyl]sulfonyl}piperazino)sulfonyl]phenyl}-1-methyl-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-7–one | 1346602-67-2 is useful as reference Impurity standard. ![Sildenafil Disulfonamide Dimer Impurity ;5-{2 -Ethoxy-5-[(4-{[4-ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5yl) phenyl]sulfonyl}piperazino)sulfonyl]phenyl}-1-methyl-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-7–one | 1346602-67-2](https://drjcrbio.com/wp-content/uploads/s-5-3.png)
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Product Name : Sildenafil Di-Amide Impurity ; 4-(2-Ethoxybenzamido)-1-methyl-3-n-propylpyrazole-5-carboxamide| 139756-03-9
Code: JCSDF-11 CAS: 139756-03-9 Chemical Formula: C17H22N4O3 Molecular Weight: 330.38 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application:Sildenafil Di-Amide Impurity ; 4-(2-Ethoxybenzamido)-1-methyl-3-n-propylpyrazole-5-carboxamide| 139756-03-9 is useful as reference Impurity standard. 
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Product Name : Sildenafil Descarbon Impurity ; 3-(6,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-N-[2-(dimethylamino)ethyl]-4-ethoxy-benzenesulfonamide | 1393816-99-3
Code: JCSDF-10 CAS: 1393816-99-3 Chemical Formula: C21H30N6O4S Molecular Weight: 462.57 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil Descarbon Impurity ; 3-(6,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-N-[2-(dimethylamino)ethyl]-4-ethoxy-benzenesulfonamide | 1393816-99-3 is useful as reference Impurity standard. ![Sildenafil Descarbon Impurity ; 3-(6,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-N-[2-(dimethylamino)ethyl]-4-ethoxy-benzenesulfonamide | 1393816-99-3](https://drjcrbio.com/wp-content/uploads/s-7-4.png)
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Product Name : Sildenafil Des(methylpiperazinyl) Chlorosulfone Impurity ; 4-Ethoxy-3-(7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d] pyrimidin-5-yl) benzene-1-sulfonyl chloride | 139756-31-3
Code: JCSDF-09 CAS: 139756-31-3 Chemical Formula: C16H17ClN4O4S Molecular Weight: 396.85 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil Des(methylpiperazinyl) Chlorosulfone Impurity ; 4-Ethoxy-3-(7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d] pyrimidin-5-yl) benzene-1-sulfonyl chloride | 139756-31-3 is useful as reference Impurity standard. ![Sildenafil Des(methylpiperazinyl) Chlorosulfone Impurity ; 4-Ethoxy-3-(7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d] pyrimidin-5-yl) benzene-1-sulfonyl chloride | 139756-31-3](https://drjcrbio.com/wp-content/uploads/s-8-3.png)
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Product Name : Sildenafil Chlorosulfone O-Desethyl Impurity ; 4-Hydroxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d] pyrimidin-5-yl)benzene-1-sulfonyl chloride | 139756-27-7
Code: JCSDF-08 CAS:139756-27-7 Chemical Formula: C15H15ClN4O4S Molecular Weight: 382.82 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil Chlorosulfone O-Desethyl Impurity ; 4-Hydroxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d] pyrimidin-5-yl)benzene-1-sulfonyl chloride | 139756-27-7 is useful as reference Impurity standard. ![Sildenafil Chlorosulfone O-Desethyl Impurity ; 4-Hydroxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d] pyrimidin-5-yl)benzene-1-sulfonyl chloride | 139756-27-7](https://drjcrbio.com/wp-content/uploads/s-9-3.png)
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Product Name : Sildenafil Chlorosulfone Impurity ;Sildenafil Chlorosulfone ; Sildenafil Chlorosulfonyl Impurity ; 5-(5-Chlorosulfonyl-2-ethoxyphenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazole[4,3-d]pyrimidine-7-on | 139756-22-2
Code: JCSDF-07 CAS: 139756-22-2 Chemical Formula: C17H19ClN4O4S Molecular Weight: 410.88 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil Chlorosulfone Impurity ;Sildenafil Chlorosulfone ; Sildenafil Chlorosulfonyl Impurity ; 5-(5-Chlorosulfonyl-2-ethoxyphenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazole[4,3-d]pyrimidine-7-on | 139756-22-2 is useful as reference Impurity standard. ![Sildenafil Chlorosulfone Impurity ;Sildenafil Chlorosulfone ; Sildenafil Chlorosulfonyl Impurity ; 5-(5-Chlorosulfonyl-2-ethoxyphenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazole[4,3-d]pyrimidine-7-on | 139756-22-2](https://drjcrbio.com/wp-content/uploads/s-10-3.png)
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Product Name : Sildenafil Chlorosulfone 2-Methyl Isomer ; 4-Ethoxy-3-(2-methyl-7-oxo-3-propyl-6,7-dihydro-2H-pyrazolo[4,3-d] pyrimidin-5-yl)benzene-1-sulfonyl chloride | 501120-42-9
Code: JCSDF-06 CAS: 501120-42-9 Chemical Formula: C17H19ClN4O4S Molecular Weight: 410.88 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil Chlorosulfone 2-Methyl Isomer ; 4-Ethoxy-3-(2-methyl-7-oxo-3-propyl-6,7-dihydro-2H-pyrazolo[4,3-d] pyrimidin-5-yl)benzene-1-sulfonyl chloride | 501120-42-9 is useful as reference Impurity standard. ![Sildenafil Chlorosulfone 2-Methyl Isomer ; 4-Ethoxy-3-(2-methyl-7-oxo-3-propyl-6,7-dihydro-2H-pyrazolo[4,3-d] pyrimidin-5-yl)benzene-1-sulfonyl chloride | 501120-42-9](https://drjcrbio.com/wp-content/uploads/s-11-3.png)
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Product Name : Sildenafil Chloroacetyl Impurity ; 5-[5-(2-Chloroacetyl)-2-ethoxyphenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one | 1058653-74-9
Code: JCSDF-05 CAS: 1058653-74-9 Chemical Formula: C19H21ClN4O3 Molecular Weight: 388.85 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil Chloroacetyl Impurity ; 5-[5-(2-Chloroacetyl)-2-ethoxyphenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one | 1058653-74-9 is useful as reference Impurity standard. ![Sildenafil Chloroacetyl Impurity ; 5-[5-(2-Chloroacetyl)-2-ethoxyphenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one | 1058653-74-9](https://drjcrbio.com/wp-content/uploads/s-12-2.png)
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Product Name : Sildenafil Carboxylic Acid Impurity ; 4-Ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d] pyrimidin-5-yl)benzoic acid | 147676-78-6
Code: JCSDF-04 CAS: 147676-78-6 Chemical Formula: C18H20N4O4 Molecular Weight: 356.38 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil Carboxylic Acid Impurity ; 4-Ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d] pyrimidin-5-yl)benzoic acid | 147676-78-6 is useful as reference Impurity standard. ![Sildenafil Carboxylic Acid Impurity ; 4-Ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d] pyrimidin-5-yl)benzoic acid | 147676-78-6](https://drjcrbio.com/wp-content/uploads/s-13-2.png)
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Product Name : Sildenafil Amino Amide Impurity ; 4-Amino-1-methyl-3-propylpyrazole-5-carboxamide | 139756-02-8
Code: JCSDF-03 CAS: 139756-02-8 Chemical Formula: C8H14N4O Molecular Weight: 182.22 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil Amino Amide Impurity ; 4-Amino-1-methyl-3-propylpyrazole-5-carboxamide | 139756-02-8 is useful as reference Impurity standard. 
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Product Name : Sildenafil Aldehyde Impurity ; 2-Ethoxy-5-(4-methyl-piperazin-1-yl-sulphonyl)-benzaldehyde
Code: JCSDF-02 CAS: NA Chemical Formula: C14H20N2O4S Molecular Weight: 312.38 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil Aldehyde Impurity ; 2-Ethoxy-5-(4-methyl-piperazin-1-yl-sulphonyl)-benzaldehyde is useful as reference Impurity standard. 
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Product Name : Sildenafil 2-Ethoxybenzoyl Chloride Impurity ; 2-Ethoxybenzoyl chloride | 42926-52-3
Code: JCSDF-01 CAS: 42926-52-3 Chemical Formula: C9H9ClO2 Molecular Weight: 184.62 Category: Reference Standards/API Drug Metabolites/EP Impurities/USP Impurities Literature: Application: Sildenafil 2-Ethoxybenzoyl Chloride Impurity ; 2-Ethoxybenzoyl chloride | 42926-52-3 is useful as reference Impurity standard. 
