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Pharmaceutical Reference Standards / Impurity Standards

Sildenafil

Sildenafil

CAT. No.S050000
CAS. No.139755-83-2
Mol. F.C22H30N6O4S
Mol. W.474.58 g/mol
Stock Status:Custom Synthesis

Sildenafil Base

Sildenafil Base

CAT. No.S050000A
CAS. No.139755-83-2
Mol. F.C22H30N6O4S
Mol. W.474.58 g/mol
Stock Status:Custom Synthesis

Sildenafil Citrate

Sildenafil Citrate

CAT. No.S050001
CAS. No.171599-83-0
Mol. F.C28H38N6O11S
Mol. W.666.70 g/mol
Stock Status:Instock

Sildenafil Amino Amide Impurity

Sildenafil Amino Amide Impurity

CAT. No.S050002
CAS. No.139756-02-8
Mol. F.C8H14N4O
Mol. W.182.20 g/mol
Stock Status:Instock

Sildenafil Amide Impurity Hydrochloride

Sildenafil Amide Impurity Hydrochloride

CAT. No.S050003
CAS. No.247584-10-7
Mol. F.C8H14N4O.HCl
Mol. W.218.68 g/mol
Stock Status:Custom Synthesis

Sildenafil Di-Amide Impurity

Sildenafil Di-Amide Impurity

CAT. No.S050004
CAS. No.139756-03-9
Mol. F.C17H22N4O3
Mol. W.330.38 g/mol
Stock Status:Instock

Sildenafil Chlorosulfonyl Impurity

Sildenafil Chlorosulfonyl Impurity

CAT. No.S050005
CAS. No.139756-22-2
Mol. F.C17H19ClN4O4S
Mol. W.410.88 g/mol
Stock Status:Instock

Sildenafil Chloro Impurity

Sildenafil Chloro Impurity

CAT. No.S050006
CAS. No.42926-52-3
Mol. F.C9H9N4ClO2
Mol. W.184.62g/mol
Stock Status:Custom Synthesis

Sildenafil Aldehyde Impurity

Sildenafil Aldehyde Impurity

CAT. No.S050007
CAS. No.332374-42-2
Mol. F.C14H20N4O4S
Mol. W.312.38 g/mol
Stock Status:Custom Synthesis

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

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

CAT. No.S050008
CAS. No.501120-40-7
Mol. F.C17H20N4O2
Mol. W.312.37 g/mol
Stock Status:Instock

Sildenafil EP Impurity F

Sildenafil EP Impurity F

CAT. No.S050009
CAS. No.139755-82-1
Mol. F.C21H28N6O4S
Mol. W.460.55 g/mol
Stock Status:Instock

Sildenafil EP Impurity A

Sildenafil EP Impurity A

CAT. No.S050010
CAS. No.1391053-95-4
Mol. F.C23H32N6O4S
Mol. W.488.60 g/mol
Stock Status:Instock

Sildenafil EP Impurity A

Sildenafil EP Impurity A

CAT. No.S050010A
CAS. No.1391053-95-4
Mol. F.C23H32N6O4S
Mol. W.488.60 g/mol
Stock Status:Custom Synthesis

Sildenafil EP Impurity D

Sildenafil EP Impurity D

CAT. No.S050011
CAS. No.1357931-55-5
Mol. F.C17H20N4O5S
Mol. W.392.43 g/mol
Stock Status:Instock

Sildenafil EP Impurity E

Sildenafil EP Impurity E

CAT. No.S050012
CAS. No.288-32-4
Mol. F.C3H4N2
Mol. W.68.08 g/mol
Stock Status:Limited Stock

Sildenafil EP Impurity B

Sildenafil EP Impurity B

CAT. No.S050013
CAS. No.1094598-75-0
Mol. F.C22H30N6O5S
Mol. W.490.58 g/mol
Stock Status:Instock

4-(2-ethoxybenzamido)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide

4-(2-ethoxybenzamido)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide

CAT. No.S050014
CAS. No.139756-03-9
Mol. F.C17H22N4O3
Mol. W.330.38 g/mol
Stock Status:Custom Synthesis

Sildenafil EP Impurity C

Sildenafil EP Impurity C

CAT. No.S050015
CAS. No.139755-91-2
Mol. F.C20H26N6O4S
Mol. W.446.52 g/mol
Stock Status:Instock

Sildenafil Acid Impurity

Sildenafil Acid Impurity

CAT. No.S050016
CAS. No.NA
Mol. F.C8H12N2O2
Mol. W.168.19g/mol
Stock Status:Instock

Sildenafil Amide Impurity

Sildenafil Amide Impurity

CAT. No.S050016A
CAS. No.139756-01-7
Mol. F.C8H12N4O3
Mol. W.212.21 g/mol
Stock Status:Instock

Sildenafil EP Impurity G

Sildenafil EP Impurity G

CAT. No.S050017
CAS. No.1346602-67-2
Mol. F.C38H46N10O8S2
Mol. W.834.96 g/mol
Stock Status:Instock

Sildenafil Methyl Sulfonate Ester Impurity

Sildenafil Methyl Sulfonate Ester Impurity

CAT. No.S050018
CAS. No.2512206-40-3
Mol. F.C18H22N4O5S
Mol. W.406.46 g/mol
Stock Status:Instock

Sildenafil Nitro Acid Impurity

Sildenafil Nitro Acid Impurity

CAT. No.S050019
CAS. No.NA
Mol. F.C8H11N3O4
Mol. W.213.19 g/mol
Stock Status:Instock

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

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

CAT. No.S050020
CAS. No.139756-00-6
Mol. F.C8H11N3O4
Mol. W.213.19g/mol
Stock Status:Instock

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

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

CAT. No.S050021
CAS. No.139756-01-7
Mol. F.C8H12N4O3
Mol. W.212.21 g/mol
Stock Status:Limited Stock

Sildenafil Monomethy Sulphate Impurity

Sildenafil Monomethy Sulphate Impurity

CAT. No.S050026
CAS. No.75-93-4
Mol. F.CH4O4S
Mol. W.112.11 g/mol
Stock Status:Custom Synthesis

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

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

CAT. No.S050027
CAS. No.247583-70-6
Mol. F.C8H12N2O2
Mol. W.168.19 g/mol
Stock Status:Custom Synthesis

Sildenafil Dimer

Sildenafil Dimer

CAT. No.S050030
CAS. No.1346602-67-2
Mol. F.C38H46N10O8S2
Mol. W.834.96 g/mol
Stock Status:Instock

Sildenafil N-Ethyl Impurity

Sildenafil N-Ethyl Impurity

CAT. No.S050033
CAS. No.642928-07-2
Mol. F.C23H32N6O4S
Mol. W.488.60 g/mol
Stock Status:Custom Synthesis

Sildenafil Aldehyde

Sildenafil Aldehyde

CAT. No.S050036
CAS. No.332374-42-2
Mol. F.C14H20N2O4S
Mol. W.312.38 g/mol
Stock Status:Custom Synthesis

Sildenafil Impurity B

Sildenafil Impurity B

CAT. No.S050047
CAS. No.200575-15-1
Mol. F.C22H32N6O5S
Mol. W.492.60 g/mol
Stock Status:Instock

Hydroxythiohomo Sildenafil

Hydroxythiohomo Sildenafil

CAT. No.S050050
CAS. No.479073-82-0
Mol. F.C23H32N6O4S2
Mol. W.520.67 g/mol
Stock Status:Custom Synthesis

Sildenafil Carboxylic Acid Impurity

Sildenafil Carboxylic Acid Impurity

CAT. No.S050051
CAS. No.147676-78-6
Mol. F.C18H20N4O4
Mol. W.356.38 g/mol
Stock Status:Custom Synthesis

methyl 4-methylpiperazine-1-sulfonate

methyl 4-methylpiperazine-1-sulfonate

CAT. No.S050054
CAS. No.NA
Mol. F.C6H14N2O3S
Mol. W.194.25 g/mol
Stock Status:Custom Synthesis

Sildenafil Impurity 7

Sildenafil Impurity 7

CAT. No.S050055
CAS. No.247583-72-8
Mol. F.C8H12N4O3
Mol. W.212.21 g/mol
Stock Status:Custom Synthesis

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

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

CAT. No.S050056
CAS. No.NA
Mol. F.C7H9N5O4
Mol. W.227.18 g/mol
Stock Status:Custom Synthesis

Sildenafil Lactam Impurity

Sildenafil Lactam Impurity

CAT. No.S050059
CAS. No.139756-21-1
Mol. F.C17H20N4O2
Mol. W.312.37 g/mol
Stock Status:Instock

2-ethoxy-5-(4-methylpiperazine-1-sulfonyl)-benzaldehyde hydrochloride

2-ethoxy-5-(4-methylpiperazine-1-sulfonyl)-benzaldehyde hydrochloride

CAT. No.S050060
CAS. No.NA
Mol. F.C14H21ClN2O4S
Mol. W.348.85 g/mol
Stock Status:Custom Synthesis

N-Nitroso Sildenafil

N-Nitroso Sildenafil

CAT. No.S050063
CAS. No.NA
Mol. F.C22H29N7O5S
Mol. W.503.57 g/mol
Stock Status:Custom Synthesis

Propoxyphenyl Thioaildenafil

Propoxyphenyl Thioaildenafil

CAT. No.S050064
CAS. No.856190-49-3
Mol. F.C24H34N6O3S2
Mol. W.518.70 g/mol
Stock Status:Custom Synthesis

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

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

CAT. No.S050065
CAS. No.NA
Mol. F.C17H19ClN4O2
Mol. W.346.81 g/mol
Stock Status:Custom Synthesis

N-Nitroso N-Desmethyl Sildenafil

N-Nitroso N-Desmethyl Sildenafil

CAT. No.S050066
CAS. No.NA
Mol. F.C21H27N7O5S
Mol. W.489.55 g/mol
Stock Status:Instock

Hydroxy Homo Sildenafil

Hydroxy Homo Sildenafil

CAT. No.S050068
CAS. No.139755-85-4
Mol. F.C23H32N6O5S
Mol. W.504.61 g/mol
Stock Status:Custom Synthesis

N-Nitroso Pyrazole N-Demethyl Sildenafil

N-Nitroso Pyrazole N-Demethyl Sildenafil

CAT. No.S050070
CAS. No.NA
Mol. F.C21H27N7O5S
Mol. W.489.60 g/mol
Stock Status:Custom Synthesis

Sildenafil Impurity 11

Sildenafil Impurity 11

CAT. No.S050071
CAS. No.NA
Mol. F.C21H27N7O5S
Mol. W.489.55 g/mol
Stock Status:Custom Synthesis

Thiohomosildenafil

Thiohomosildenafil

CAT. No.S050072
CAS. No.479073-80-8
Mol. F.C23H32N6O3S2
Mol. W.504.67 g/mol
Stock Status:Custom Synthesis

Sildenafil Ethyl Sulfonate Impurity

Sildenafil Ethyl Sulfonate Impurity

CAT. No.S050073
CAS. No.1971915-89-5
Mol. F.C19H24N4O5S
Mol. W.420.48 g/mol
Stock Status:Custom Synthesis

Sildenafil Impurity 12

Sildenafil Impurity 12

CAT. No.S050074
CAS. No.139756-26-6
Mol. F.C15H16N4O2
Mol. W.284.31 g/mol
Stock Status:Custom Synthesis

Metabolites

Desmethyl Carbodenafil

Desmethyl Carbodenafil

CAT. No.S050053
CAS. No.147676-79-7
Mol. F.C23H30N6O3
Mol. W.438.52 g/mol
Stock Status:Custom Synthesis

Descarbon Sildenafil

Descarbon Sildenafil

CAT. No.S050057
CAS. No.466684-88-8
Mol. F.C20H28N6O4S
Mol. W.448.54 g/mol
Stock Status:Custom Synthesis

Pyrazole N-Demethyl Sildenafil

Pyrazole N-Demethyl Sildenafil

CAT. No.S050058
CAS. No.139755-95-6
Mol. F.C21H28N6O4S
Mol. W.460.55 g/mol
Stock Status:Instock

Sildenafil Metabolite

Sildenafil Metabolite

CAT. No.S050061
CAS. No.NA
Mol. F.NA
Mol. W.NA
Stock Status:Custom Synthesis

Sildenafil Metabolite

Sildenafil Metabolite

CAT. No.S050062
CAS. No.NA
Mol. F.NA
Mol. W.NA
Stock Status:Custom Synthesis

Isotope Labelled Compounds

N-Desmethyl Sildenafil -D8

N-Desmethyl Sildenafil -D8

CAT. No.S050022
CAS. No.NA
Mol. F.C21H20D8N6O4S
Mol. W.468.60 g/mol
Stock Status:Instock

Sildenafil D3

Sildenafil D3

CAT. No.S050023
CAS. No.1126745-90-1
Mol. F.C22H27D3N6O4S
Mol. W.477.59 g/mol
Stock Status:Instock

Sildenafil-D8

Sildenafil-D8

CAT. No.S050028
CAS. No.951385-68-5
Mol. F.C22H22D8N6O4S
Mol. W.482.63 g/mol
Stock Status:Instock

Pyrazole N-Demethyl Sildenafil-D3

Pyrazole N-Demethyl Sildenafil-D3

CAT. No.S050029
CAS. No.1185044-03-4
Mol. F.C21H25D3N6O4S
Mol. W.463.57 g/mol
Stock Status:Custom Synthesis

Homo Sildenafil-D5

Homo Sildenafil-D5

CAT. No.S050046
CAS. No.1216711-61-3
Mol. F.C23H27D5N6O4S
Mol. W.493.63 g/mol
Stock Status:Instock

N-Desmethyl Sildenafil N-Glucuronide Sodium Salt

N-Desmethyl Sildenafil N-Glucuronide Sodium Salt

CAT. No.S050052
CAS. No.NA
Mol. F.C27H35N6NaO10S
Mol. W.NA
Stock Status:Custom Synthesis

Propoxyphenyl Thiosildenafil D8

Propoxyphenyl Thiosildenafil D8

CAT. No.S050067
CAS. No.NA
Mol. F.C23H24D8N6O3S2
Mol. W.512.72 g/mol
Stock Status:Custom Synthesis

Sildenafil Citrate-D3

Sildenafil Citrate-D3

CAT. No.S050069
CAS. No.NA
Mol. F.C22H27D3N6O4S.C6H8O7
Mol. W.669.71 g/mol
Stock Status:Custom Synthesis