sildenafil citrate and its Impurities

A citrate salt of Sildenafil sold under the brand name of Viagra. Sildenafil is used for the treatment of erectile dysfunction and pulmonary arterial hypertension. 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 Citrate API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

Displaying 69 results for sildenafil citrate Impurities
Drug Reference Standards & Impurity Synthesis in India
PA 19 09000

Sildenafil Citrate

Sildenafil Citrate

  • Catalogue No.:PA 19 09000

  • CAS :

    171599-83-0

  • Molecular Formula : C28H38N6O11S

  • Molecular Weight : 666.71

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09010

Sildenafil Citrate - Impurity A

Isobutyl Sildenafil

  • Catalogue No.:PA 19 09010

  • CAS :

    1391053-95-4

  • Molecular Formula : C23H32N6O4S

  • Molecular Weight : 488.60

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09020

Sildenafil Citrate - Impurity B

5-[2-Ethoxy-5-(4-methyl-4-oxy-piperazine-1-sulfonyl)-phenyl]-1-methyl-3-propyl-1,6-dihydro-pyrazolo[4,3-d]pyrimidin-7-one

  • Catalogue No.:PA 19 09020

  • CAS :

    1094598-75-0

  • Molecular Formula : C22H30N6O5S

  • Molecular Weight : 490.58

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09030

Sildenafil Citrate - Impurity C

5-[2-Hydroxy-5-(4-methylpiperazinylsulphonyl)phenyl]1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyramidin-7-one

  • Catalogue No.:PA 19 09030

  • CAS :

    139755-91-2

  • Molecular Formula : C20H26N6O4S

  • Molecular Weight : 446.52

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09040

Sildenafil Citrate - Impurity D

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

  • Catalogue No.:PA 19 09040

  • CAS :

    1357931-55-5

  • Molecular Formula : C17H20N4O5S

  • Molecular Weight : 392.43

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09050

Sildenafil Citrate - Impurity E

1H-Imidazole

  • Catalogue No.:PA 19 09050

  • CAS :

    288-32-4

  • Molecular Formula : C3H4N2

  • Molecular Weight : 68.08

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09070

Sildenafil Citrate - Impurity G

Sildenafil Dimer Impurity

  • Catalogue No.:PA 19 09070

  • CAS :

    1346602-67-2

  • Molecular Formula : C38H46N10O8S2

  • Molecular Weight : 834.96

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09510

Sildenafil Aldehyde

Sildenafil Aldehyde

  • Catalogue No.:PA 19 09510

  • CAS :

    332374-42-2

  • Molecular Formula : C14H20N2O4S

  • Molecular Weight : 312.38

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09520

Sildenafil Amino Amide Impurity

Sildenafil Amino Amide Impurity

  • Catalogue No.:PA 19 09520

  • CAS :

    139756-02-8

  • Molecular Formula : C8H14N4O

  • Molecular Weight : 182.22

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09530

Sildenafil Amide Impurity Hydrochloride

Sildenafil Amide Impurity Hydrochloride

  • Catalogue No.:PA 19 09530

  • CAS :

    247584-10-7

  • Molecular Formula : C8H15ClN4O

  • Molecular Weight : 218.68

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09540

Sildenafil Chloro Impurity

Sildenafil Chloro Impurity

  • Catalogue No.:PA 19 09540

  • CAS :

    42926-52-3

  • Molecular Formula : C9H9ClO2

  • Molecular Weight : 184.62

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09550

Sildenafil Carboxamide Impurity

Sildenafil Carboxamide Impurity

  • Catalogue No.:PA 19 09550

  • CAS :

    139756-03-9

  • Molecular Formula : C17H22N4O3

  • Molecular Weight : 330.38

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09560

Sildenafil Lactam Impurity

Sildenafil Lactam Impurity

  • Catalogue No.:PA 19 09560

  • CAS :

    139756-21-1

  • Molecular Formula : C17H20N4O2

  • Molecular Weight : 312.37

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09570

Sildenafil Chlorosulfonyl Impurity

Sildenafil Chlorosulfonyl Impurity

  • Catalogue No.:PA 19 09570

  • CAS :

    139756-22-2

  • Molecular Formula : C17H19ClN4O4S

  • Molecular Weight : 410.88

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09580

Sildenafil Citrate - Impurity F

5-[2-Ethoxy-5-(piperazin-1-ylsulfonyl)phenyl]-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one

  • Catalogue No.:PA 19 09580

  • CAS :

    139755-82-1

  • Molecular Formula : C21H28N6O4S

  • Molecular Weight : 460.55

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09590

4-Ethoxy-N,N-bis(2-hydroxyethyl)-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonamide

4-Ethoxy-N,N-bis(2-hydroxyethyl)-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonamide

  • Catalogue No.:PA 19 09590

  • CAS :

    226956-43-0

  • Molecular Formula : C21H29N5O6S

  • Molecular Weight : 479.55

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09600

O-Desethyl-O-propyl Methisosildenafil

O-Desethyl-O-propyl Methisosildenafil

  • Catalogue No.:PA 19 09600

  • CAS :

    1391053-82-9

  • Molecular Formula : C24H34N6O4S

  • Molecular Weight : 502.63

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09610

Propoxyphenyl Homohydroxysildenafil

Propoxyphenyl Homohydroxysildenafil

  • Catalogue No.:PA 19 09610

  • CAS :

    139755-87-6

  • Molecular Formula : C24H34N6O5S

  • Molecular Weight : 518.63

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09620

Propoxyphenyl Sildenafil

Propoxyphenyl Sildenafil

  • Catalogue No.:PA 19 09620

  • CAS :

    877777-10-1

  • Molecular Formula : C23H32N6O4S

  • Molecular Weight : 488.6

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09630

Descarbonsildenafil

Descarbonsildenafil

  • Catalogue No.:PA 19 09630

  • CAS :

    1393816-99-3

  • Molecular Formula : C21H30N6O4S

  • Molecular Weight : 462.57

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09640

5-(5-Carboxy-2-ethoxyphenyl)-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one

5-(5-Carboxy-2-ethoxyphenyl)-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one

  • Catalogue No.:PA 19 09640

  • CAS :

    147676-78-6

  • Molecular Formula : C18H20N4O4

  • Molecular Weight : 356.38

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09650

4-Amino-1-methyl-5-propyl-1H-pyrazole-3-carboxamide

4-Amino-1-methyl-5-propyl-1H-pyrazole-3-carboxamide

  • Catalogue No.:PA 19 09650

  • CAS :

    247583-78-4

  • Molecular Formula : C8H14N4O

  • Molecular Weight : 182.22

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09660

Sildenafil Amide Impurity

Sildenafil Amide Impurity

  • Catalogue No.:PA 19 09660

  • CAS :

    139756-01-7

  • Molecular Formula : C8H12N4O3

  • Molecular Weight : 212.21

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09670

Sildenafil Methyl Sulfonate Ester Impurity

Sildenafil Methyl Sulfonate Ester Impurity

  • Catalogue No.:PA 19 09670

  • CAS :

    2512206-40-3

  • Molecular Formula : C18H22N4O5S

  • Molecular Weight : 406.46

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09680

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

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

  • Catalogue No.:PA 19 09680

  • CAS :

    139756-00-6

  • Molecular Formula : C8H11N3O4

  • Molecular Weight : 213.19

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09690

Demethylpiperazinyl Iso Sildenafil Sulfonyl Chloride

Demethylpiperazinyl Iso Sildenafil Sulfonyl Chloride

  • Catalogue No.:PA 19 09690

  • CAS :

    501120-42-9

  • Molecular Formula : C17H19ClN4O4S

  • Molecular Weight : 410.88

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09700

(Z)-N'-(5-Chloro-4-methyl-2-propyl-1H-imidazol-1-yl)-2-ethoxy-5-((4-ethylpiperazin-1-yl)sulfonyl)benzimidamide

(Z)-N'-(5-Chloro-4-methyl-2-propyl-1H-imidazol-1-yl)-2-ethoxy-5-((4-ethylpiperazin-1-yl)sulfonyl)benzimidamide

  • Catalogue No.:PA 19 09700

  • CAS :

    NA

  • Molecular Formula : C22H33ClN6O3S

  • Molecular Weight : 497.05

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09710

(Z)-N'-(5-Chloro-4-methyl-2-propyl-1H-imidazol-1-yl)-2-ethoxybenzimidamide

(Z)-N'-(5-Chloro-4-methyl-2-propyl-1H-imidazol-1-yl)-2-ethoxybenzimidamide

  • Catalogue No.:PA 19 09710

  • CAS :

    NA

  • Molecular Formula : C16H21ClN4O

  • Molecular Weight : 320.82

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09720

(E)-4-((2-Ethoxybenzylidene)amino)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide

(E)-4-((2-Ethoxybenzylidene)amino)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide

  • Catalogue No.:PA 19 09720

  • CAS :

    845302-49-0

  • Molecular Formula : C17H22N4O2

  • Molecular Weight : 314.38

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09730

Iso Sildenafil

Iso Sildenafil

  • Catalogue No.:PA 19 09730

  • CAS :

    253178-46-0

  • Molecular Formula : C22H30N6O4S

  • Molecular Weight : 474.58

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09740

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

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

  • Catalogue No.:PA 19 09740

  • CAS :

    732307-70-9

  • Molecular Formula : C8H12N4O2

  • Molecular Weight : 196.21

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09750

4-(Hydroxyamino)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide

4-(Hydroxyamino)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide

  • Catalogue No.:PA 19 09750

  • CAS :

    2512217-97-7

  • Molecular Formula : C8H14N4O2

  • Molecular Weight : 198.23

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09760

4-[2-Ethoxy-5-(1-piperazinylsulfonyl)benzoamido]-1-methyl-3-propyl-1H-pyrazole-5-carboxamide

4-[2-Ethoxy-5-(1-piperazinylsulfonyl)benzoamido]-1-methyl-3-propyl-1H-pyrazole-5-carboxamide

  • Catalogue No.:PA 19 09760

  • CAS :

    300547-20-0

  • Molecular Formula : C21H30N6O5S

  • Molecular Weight : 478.57

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09770

4-(2-Ethoxybenzamido)-3-isobutyl-1-methyl-1H-pyrazole-5-carboxamide

4-(2-Ethoxybenzamido)-3-isobutyl-1-methyl-1H-pyrazole-5-carboxamide

  • Catalogue No.:PA 19 09770

  • CAS :

    1467610-62-3

  • Molecular Formula : C18H24N4O3

  • Molecular Weight : 344.42

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09780

Homo Sildenafil

Homo Sildenafil

  • Catalogue No.:PA 19 09780

  • CAS :

    642928-07-2

  • Molecular Formula : C23H32N6O4S

  • Molecular Weight : 488.61

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09790

S-des[2-(1-Methyl-2-pyrrolidinyl)ethyl]amine S-Hydroxy Udenafil

S-des[2-(1-Methyl-2-pyrrolidinyl)ethyl]amine S-Hydroxy Udenafil

  • Catalogue No.:PA 19 09790

  • CAS :

    2761158-33-0

  • Molecular Formula : C18H22N4O5S

  • Molecular Weight : 406.46

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09800

Propoxyphenyl-​thiohydroxyhomosilde​nafil

Propoxyphenyl-​thiohydroxyhomosilde​nafil

  • Catalogue No.:PA 19 09800

  • CAS :

    479073-90-0

  • Molecular Formula : C24H34N6O4S2

  • Molecular Weight : 534.69

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09810

Thiodimethylsildenafil

Thiodimethylsildenafil

  • Catalogue No.:PA 19 09810

  • CAS :

    1260112-90-0

  • Molecular Formula : C23H32N6O3S2

  • Molecular Weight : 504.67

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Drug Reference Standards & Impurity Synthesis in India
PA IPIPRS 77 14

Sildenafil Citrate (IPRS/77/14)-from IPC

Sildenafil Citrate (IPRS/77/14)-from IPC

  • Catalogue No.:PA IPIPRS 77 14

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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Drug Reference Standards & Impurity Synthesis in India
PA EPY0001891

Sildenafil for peak identification (Y0001891)

Sildenafil for peak identification (Y0001891)

  • Catalogue No.:PA EPY0001891

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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Drug Reference Standards & Impurity Synthesis in India
PA USP1612561

Sildenafil Citrate (1612561)

Sildenafil Citrate (1612561)

  • Catalogue No.:PA USP1612561

  • CAS :

    171599-83-0

  • Molecular Formula : NA

  • Molecular Weight : NA

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Drug Reference Standards & Impurity Synthesis in India
PA USP1612685

Sildenafil Related Compound A (5-[2-Ethoxy-5-[(4-methylpiperazin-1-yl)sulfonyl]phenyl]-1-methyl-3-( (1612685)

Sildenafil Related Compound A (5-[2-Ethoxy-5-[(4-methylpiperazin-1-yl)sulfonyl]phenyl]-1-methyl-3-( (1612685)

  • Catalogue No.:PA USP1612685

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09960

3-[[[5-Aminocarbonyl-1-methyl-3-propyl-1H-pyrazol-4-yl]amino]carbonyl]-4-ethoxy-benzenesulfonyl Dimer

3-[[[5-Aminocarbonyl-1-methyl-3-propyl-1H-pyrazol-4-yl]amino]carbonyl]-4-ethoxy-benzenesulfonyl Dimer

  • Catalogue No.:PA 19 09960

  • CAS :

    1391054-84-4

  • Molecular Formula : C34H42N8O8S

  • Molecular Weight : 722.81

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09970

3-[[[5-(Aminocarbonyl)-1-methyl-3-propyl-1H-pyrazol-4-yl]amino]carbonyl]-4-propoxy-benzenesulfonyl Chloride

3-[[[5-(Aminocarbonyl)-1-methyl-3-propyl-1H-pyrazol-4-yl]amino]carbonyl]-4-propoxy-benzenesulfonyl Chloride

  • Catalogue No.:PA 19 09970

  • CAS :

    374776-34-8

  • Molecular Formula : C18H23ClN4O5S

  • Molecular Weight : 442.92

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PA 19 09980

4-Amino-1-methyl-3-(2-methylpropyl)-1H-pyrazole-5-carboxamide

4-Amino-1-methyl-3-(2-methylpropyl)-1H-pyrazole-5-carboxamide

  • Catalogue No.:PA 19 09980

  • CAS :

    268204-00-8

  • Molecular Formula : C9H16N4O

  • Molecular Weight : 196.25

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09820

Chlorodenafil

Chlorodenafil

  • Catalogue No.:PA 19 09820

  • CAS :

    1058653-74-9

  • Molecular Formula : C19H21ClN4O3

  • Molecular Weight : 388.85

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09830

Demethylpiperazinyl Desethyl Sildenafil Sulfonyl Chloride

Demethylpiperazinyl Desethyl Sildenafil Sulfonyl Chloride

  • Catalogue No.:PA 19 09830

  • CAS :

    139756-27-7

  • Molecular Formula : C15H15ClN4O4S

  • Molecular Weight : 382.82

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09880

Ethyl 4-ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonate

Ethyl 4-ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonate

  • Catalogue No.:PA 19 09880

  • CAS :

    1971915-89-5

  • Molecular Formula : C19H24N4O5S

  • Molecular Weight : 420.48

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Drug Reference Standards & Impurity Synthesis in India
PA 19 09890

2-Ethoxy-5-(ethoxysulfonyl)benzoic Acid

2-Ethoxy-5-(ethoxysulfonyl)benzoic Acid

  • Catalogue No.:PA 19 09890

  • CAS :

    2731926-23-9

  • Molecular Formula : C11H14O6S

  • Molecular Weight : 274.29

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PA 19 09900

Ethyl 2-ethoxy-5-(ethoxysulfonyl)benzoate

Ethyl 2-ethoxy-5-(ethoxysulfonyl)benzoate

  • Catalogue No.:PA 19 09900

  • CAS :

    NA

  • Molecular Formula : C13H18O6S

  • Molecular Weight : 302.34

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PA 19 09910

Methyl 2-ethoxy-5-(methoxysulfonyl)benzoate

Methyl 2-ethoxy-5-(methoxysulfonyl)benzoate

  • Catalogue No.:PA 19 09910

  • CAS :

    NA

  • Molecular Formula : C11H14O6S

  • Molecular Weight : 274.29

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PA 19 09920

2-Ethoxy-5-((4-ethylpiperazin-1-yl)sulfonyl)benzoic Acid

2-Ethoxy-5-((4-ethylpiperazin-1-yl)sulfonyl)benzoic Acid

  • Catalogue No.:PA 19 09920

  • CAS :

    1245644-35-2

  • Molecular Formula : C15H22N2O5S

  • Molecular Weight : 342.41

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PA 19 09930

5-(2-methoxy-5-((4-methylpiperazin-1-yl)sulfonyl)phenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one

5-(2-methoxy-5-((4-methylpiperazin-1-yl)sulfonyl)phenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one

  • Catalogue No.:PA 19 09930

  • CAS :

    263897-18-3

  • Molecular Formula : C21H28N6O4S

  • Molecular Weight : 460.55

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PA 19 09940

4-(2-Methoxy-5-((4-methylpiperazin-1-yl)sulfonyl)benzamido)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide

4-(2-Methoxy-5-((4-methylpiperazin-1-yl)sulfonyl)benzamido)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide

  • Catalogue No.:PA 19 09940

  • CAS :

    263897-17-2

  • Molecular Formula : C21H30N6O5S

  • Molecular Weight : 478.57

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PA 19 09950

4-(2-Methoxy-5-((4-methylpiperazin-1-yl)sulfonyl)phenyl)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide

4-(2-Methoxy-5-((4-methylpiperazin-1-yl)sulfonyl)phenyl)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide

  • Catalogue No.:PA 19 09950

  • CAS :

    NA

  • Molecular Formula : C20H29N5O4S

  • Molecular Weight : 435.54

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PA 19 09515

2-Methoxy-5-((4-methylpiperazin-1-yl)sulfonyl)benzoic Acid

2-Methoxy-5-((4-methylpiperazin-1-yl)sulfonyl)benzoic Acid

  • Catalogue No.:PA 19 09515

  • CAS :

    263897-16-1

  • Molecular Formula : C13H18N2O5S

  • Molecular Weight : 314.36

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PA 19 09525

2-Hydroxy-5-[(4-methyl-1-piperazinyl)sulfonyl]benzoic Acid

2-Hydroxy-5-[(4-methyl-1-piperazinyl)sulfonyl]benzoic Acid

  • Catalogue No.:PA 19 09525

  • CAS :

    960009-35-2

  • Molecular Formula : C12H16N2O5S

  • Molecular Weight : 300.33

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PA 19 09990

5,5'-(Piperazine-1,4-disulfonyl)bis(2-ethoxybenzoic Acid)

5,5'-(Piperazine-1,4-disulfonyl)bis(2-ethoxybenzoic Acid)

  • Catalogue No.:PA 19 09990

  • CAS :

    2725318-34-1

  • Molecular Formula : C22H26N2O10S2

  • Molecular Weight : 542.57

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PA 19 09535

Nor Acetildenafil

Nor Acetildenafil

  • Catalogue No.:PA 19 09535

  • CAS :

    949091-38-7

  • Molecular Formula : C24H32N6O3

  • Molecular Weight : 452.55

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PA 19 0091000

2-Ethoxy-5-[(4-methyl-1-piperazinyl)sulfonyl]- benzoic Acid

2-Ethoxy-5-[(4-methyl-1-piperazinyl)sulfonyl]- benzoic Acid

  • Catalogue No.:PA 19 0091000

  • CAS :

    194602-23-8

  • Molecular Formula : C14H20N2O5S

  • Molecular Weight : 328.38

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PA 19 0091001

3-(4,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxy-N-[2-(methylamino)ethyl]benzenesulfonamide Hydrochloride

3-(4,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxy-N-[2-(methylamino)ethyl]benzenesulfonamide Hydrochloride

  • Catalogue No.:PA 19 0091001

  • CAS :

    NA

  • Molecular Formula : C20H29ClN6O4S

  • Molecular Weight : 485

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Drug Reference Standards & Impurity Synthesis in India
PA 19 0091003

5-(2-Isobutyl)-4-amino-1H-pyrazole-3-carboxylic acid

5-(2-Isobutyl)-4-amino-1H-pyrazole-3-carboxylic acid

  • Catalogue No.:PA 19 0091003

  • CAS :

    1093415-88-3

  • Molecular Formula : C8H13N3O2

  • Molecular Weight : 183.21

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Drug Reference Standards & Impurity Synthesis in India
PA 19 0091004

5-(5-Chlorosulfonyl-2-ethoxyphenyl)-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one

5-(5-Chlorosulfonyl-2-ethoxyphenyl)-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one

  • Catalogue No.:PA 19 0091004

  • CAS :

    139756-31-3

  • Molecular Formula : C16H17ClN4O4S

  • Molecular Weight : 396.85

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Drug Reference Standards & Impurity Synthesis in India
PA 19 0091005

Desmethyl Thiosildenafil

Desmethyl Thiosildenafil

  • Catalogue No.:PA 19 0091005

  • CAS :

    479073-86-4

  • Molecular Formula : C21H28N6O3S2

  • Molecular Weight : 476.61

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Drug Reference Standards & Impurity Synthesis in India
PA 19 0091006

5-(2-(Benzyloxy)phenyl)-1,4-dihydro-7H-[1,2,3]triazolo[4,5-d]pyrimidin-7-one

5-(2-(Benzyloxy)phenyl)-1,4-dihydro-7H-[1,2,3]triazolo[4,5-d]pyrimidin-7-one

  • Catalogue No.:PA 19 0091006

  • CAS :

    37762-20-2

  • Molecular Formula : C17H13N5O2

  • Molecular Weight : 319.32

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Drug Reference Standards & Impurity Synthesis in India
PA 19 0091007

3-Isobutylpyrazolo[4,3-d]pyrimidine

3-Isobutylpyrazolo[4,3-d]pyrimidine

  • Catalogue No.:PA 19 0091007

  • CAS :

    1346600-82-5

  • Molecular Formula : C9H12N4

  • Molecular Weight : 176.22

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Drug Reference Standards & Impurity Synthesis in India
PA 19 0091008

De(methypiperazinyl) Sildenafil Dimer

De(methypiperazinyl) Sildenafil Dimer

  • Catalogue No.:PA 19 0091008

  • CAS :

    1346603-48-2

  • Molecular Formula : C34H38N8O6S

  • Molecular Weight : 686.79

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Drug Reference Standards & Impurity Synthesis in India
PA IPRSS015

Sildenafil Citrate (IPRSS015)

Sildenafil Citrate (IPRSS015)

  • Catalogue No.:PA IPRSS015

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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Drug Reference Standards & Impurity Synthesis in India
PA WSM 00919016

Sildenafil Citrate (WSM)

Sildenafil Citrate (WSM)

  • Catalogue No.:PA WSM 00919016

  • CAS :

    171599-83-0

  • Molecular Formula : C28H38N6O11S

  • Molecular Weight : 666.71

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