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.
stdClass Object ( [pname] => Sildenafil Citrate - Impurity A [catalogue_number] => PA 19 09010 [category_ids] => 88,82,80,78,75,71,70 [chemical_name] => [weight] => 488.60 [form] => C23H32N6O4S [cas] => 1391053-95-4 [pslug] => 1391053-95-4-sildenafil-citrate-impurity-a-pa1909010 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 09010
CAS :
Molecular Formula : C23H32N6O4S
Molecular Weight : 488.60
stdClass Object ( [pname] => Sildenafil Citrate - Impurity B [catalogue_number] => PA 19 09020 [category_ids] => 70,71,75,78,80,82,88 [chemical_name] => [weight] => 490.58 [form] => C22H30N6O5S [cas] => 1094598-75-0 [pslug] => 1094598-75-0-sildenafil-citrate-impurity-b-pa1909020 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 09020
Molecular Formula : C22H30N6O5S
Molecular Weight : 490.58
stdClass Object ( [pname] => Sildenafil Citrate - Impurity C [catalogue_number] => PA 19 09030 [category_ids] => ,80,71,76,75,78,70,82,88, [chemical_name] => [weight] => 446.52 [form] => C20H26N6O4S [cas] => 139755-91-2 [pslug] => 139755-91-2-sildenafil-citrate-impurity-c-pa1909030 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 09030
Molecular Formula : C20H26N6O4S
Molecular Weight : 446.52
stdClass Object ( [pname] => Sildenafil Citrate - Impurity D [catalogue_number] => PA 19 09040 [category_ids] => 88,82,80,78,75,71,70 [chemical_name] => [weight] => 392.43 [form] => C17H20N4O5S [cas] => 1357931-55-5 [pslug] => 1357931-55-5-sildenafil-citrate-impurity-d-pa1909040 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 09040
Molecular Formula : C17H20N4O5S
Molecular Weight : 392.43
stdClass Object ( [pname] => Sildenafil Citrate - Impurity G [catalogue_number] => PA 19 09070 [category_ids] => ,80,71,75,78,70,82,88, [chemical_name] => [weight] => 834.96 [form] => C38H46N10O8S2 [cas] => 1346602-67-2 [pslug] => 1346602-67-2-sildenafil-citrate-impurity-g-pa1909070 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 09070
Molecular Formula : C38H46N10O8S2
Molecular Weight : 834.96
stdClass Object ( [pname] => Sildenafil Amide Impurity Hydrochloride [catalogue_number] => PA 19 09530 [category_ids] => ,79,71,70,75, [chemical_name] => [weight] => 218.68 [form] => C8H15ClN4O [cas] => 247584-10-7 [pslug] => 247584-10-7-sildenafil-amide-impurity-hydrochloride-pa1909530 [latest_product] => 0 [linkproducts] => 1 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 09530
Molecular Formula : C8H15ClN4O
Molecular Weight : 218.68
stdClass Object ( [pname] => Sildenafil Carboxamide Impurity [catalogue_number] => PA 19 09550 [category_ids] => ,70,71,75,78,82, [chemical_name] => [weight] => 330.38 [form] => C17H22N4O3 [cas] => 139756-03-9 [pslug] => 139756-03-9-sildenafil-carboxamide-impurity-pa1909550 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 09550
Molecular Formula : C17H22N4O3
Molecular Weight : 330.38
stdClass Object ( [pname] => Sildenafil Citrate - Impurity F [catalogue_number] => PA 19 09580 [category_ids] => 82,78,76,75,70 [chemical_name] => [weight] => 460.55 [form] => C21H28N6O4S [cas] => 139755-82-1 [pslug] => 139755-82-1-sildenafil-citrate-impurity-f-pa1909580 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 09580
Molecular Formula : C21H28N6O4S
Molecular Weight : 460.55
stdClass Object ( [pname] => Propoxyphenyl Sildenafil [catalogue_number] => PA 19 09620 [category_ids] => ,79,80,71,75,78,70,82,88, [chemical_name] => [weight] => 488.6 [form] => C23H32N6O4S [cas] => 877777-10-1 [pslug] => 877777-10-1-propoxyphenyl-sildenafil-pa1909620 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 09620
Molecular Weight : 488.6
stdClass Object ( [pname] => Sildenafil Methyl Sulfonate Ester Impurity [catalogue_number] => PA 19 09670 [category_ids] => 88,82,80,79,78,76,75,71,70 [chemical_name] => [weight] => 406.46 [form] => C18H22N4O5S [cas] => 2512206-40-3 [pslug] => 2512206-40-3-sildenafil-methyl-sulfonate-ester-impurity-pa1909670 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 09670
Molecular Formula : C18H22N4O5S
Molecular Weight : 406.46
stdClass Object ( [pname] => Demethylpiperazinyl Iso Sildenafil Sulfonyl Chloride [catalogue_number] => PA 19 09690 [category_ids] => ,80,71,75,78,70,82,88, [chemical_name] => [weight] => 410.88 [form] => C17H19ClN4O4S [cas] => 501120-42-9 [pslug] => 501120-42-9-demethylpiperazinyl-iso-sildenafil-sulfonyl-chloride-pa1909690 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 09690
Molecular Formula : C17H19ClN4O4S
Molecular Weight : 410.88
stdClass Object ( [pname] => 4-[2-Ethoxy-5-(1-piperazinylsulfonyl)benzoamido]-1-methyl-3-propyl-1H-pyrazole-5-carboxamide [catalogue_number] => PA 19 09760 [category_ids] => ,79,80,69,71,78,70,82,88,75, [chemical_name] => [weight] => 478.57 [form] => C21H30N6O5S [cas] => 300547-20-0 [pslug] => 300547-20-0-4-2-ethoxy-5-1-piperazinylsulfonyl-benzoamido-1-methyl-3-propyl-1h-pyrazole-5-carboxamide-pa1909760 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 09760
Molecular Formula : C21H30N6O5S
Molecular Weight : 478.57
stdClass Object ( [pname] => 3-[[[5-Aminocarbonyl-1-methyl-3-propyl-1H-pyrazol-4-yl]amino]carbonyl]-4-ethoxy-benzenesulfonyl Dimer [catalogue_number] => PA 19 09960 [category_ids] => ,80,71,75,78,70,82,88, [chemical_name] => [weight] => 722.81 [form] => C34H42N8O8S [cas] => 1391054-84-4 [pslug] => 1391054-84-4-3-5-aminocarbonyl-1-methyl-3-propyl-1h-pyrazol-4-yl-amino-carbonyl-4-ethoxy-benzenesulfonyl-dimer-pa1909960 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 09960
Molecular Formula : C34H42N8O8S
Molecular Weight : 722.81
stdClass Object ( [pname] => Demethylpiperazinyl Desethyl Sildenafil Sulfonyl Chloride [catalogue_number] => PA 19 09830 [category_ids] => ,80,71,75,78,70,82,88, [chemical_name] => [weight] => 382.82 [form] => C15H15ClN4O4S [cas] => 139756-27-7 [pslug] => 139756-27-7-demethylpiperazinyl-desethyl-sildenafil-sulfonyl-chloride-pa1909830 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 09830
Molecular Formula : C15H15ClN4O4S
Molecular Weight : 382.82
stdClass Object ( [pname] => De(methypiperazinyl) Sildenafil Dimer [catalogue_number] => PA 19 09860 [category_ids] => ,80,71,75,78,70,82,88, [chemical_name] => [weight] => 686.79 [form] => C34H38N8O6S [cas] => 1346603-48-2 [pslug] => 1346603-48-2-de-methypiperazinyl-sildenafil-dimer-pa1909860 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 09860
Molecular Formula : C34H38N8O6S
Molecular Weight : 686.79
stdClass Object ( [pname] => 2-Ethoxy-5-[(4-methyl-1-piperazinyl)sulfonyl]- benzoic Acid [catalogue_number] => PA 19 0091000 [category_ids] => ,75,76,78,70,82, [chemical_name] => [weight] => 328.38 [form] => C14H20N2O5S [cas] => 194602-23-8 [pslug] => 194602-23-8-2-ethoxy-5-4-methyl-1-piperazinyl-sulfonyl-benzoic-acid-pa190091000 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 0091000
Molecular Formula : C14H20N2O5S
Molecular Weight : 328.38
stdClass Object ( [pname] => 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_number] => PA 19 0091001 [category_ids] => ,75,76,78,70,82, [chemical_name] => [weight] => 485 [form] => C20H29ClN6O4S [cas] => NA [pslug] => 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-pa190091001 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 0091001
Molecular Formula : C20H29ClN6O4S
Molecular Weight : 485
stdClass Object ( [pname] => 5-(2-Isobutyl)-4-amino-1H-pyrazole-3-carboxylic acid [catalogue_number] => PA 19 0091003 [category_ids] => ,75,76,78,70,82, [chemical_name] => [weight] => 183.21 [form] => C8H13N3O2 [cas] => 1093415-88-3 [pslug] => 1093415-88-3-5-2-isobutyl-4-amino-1h-pyrazole-3-carboxylic-acid-pa190091003 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 0091003
Molecular Formula : C8H13N3O2
Molecular Weight : 183.21
stdClass Object ( [pname] => 5-(5-Chlorosulfonyl-2-ethoxyphenyl)-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one [catalogue_number] => PA 19 0091004 [category_ids] => ,75,76,78,70,82, [chemical_name] => [weight] => 396.85 [form] => C16H17ClN4O4S [cas] => 139756-31-3 [pslug] => 139756-31-3-5-5-chlorosulfonyl-2-ethoxyphenyl-3-propyl-1-6-dihydro-7h-pyrazolo-4-3-d-pyrimidin-7-one-pa190091004 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 0091004
Molecular Formula : C16H17ClN4O4S
Molecular Weight : 396.85
stdClass Object ( [pname] => Desmethyl Thiosildenafil [catalogue_number] => PA 19 0091005 [category_ids] => ,75,76,78,70,82, [chemical_name] => [weight] => 476.61 [form] => C21H28N6O3S2 [cas] => 479073-86-4 [pslug] => 479073-86-4-desmethyl-thiosildenafil-pa190091005 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 0091005
Molecular Formula : C21H28N6O3S2
Molecular Weight : 476.61
stdClass Object ( [pname] => 5-(2-(Benzyloxy)phenyl)-1,4-dihydro-7H-[1,2,3]triazolo[4,5-d]pyrimidin-7-one [catalogue_number] => PA 19 0091006 [category_ids] => ,75,76,78,70,82, [chemical_name] => [weight] => 319.32 [form] => C17H13N5O2 [cas] => 37762-20-2 [pslug] => 37762-20-2-5-2-benzyloxy-phenyl-1-4-dihydro-7h-1-2-3-triazolo-4-5-d-pyrimidin-7-one-pa190091006 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 0091006
Molecular Formula : C17H13N5O2
Molecular Weight : 319.32
stdClass Object ( [pname] => 3-Isobutylpyrazolo[4,3-d]pyrimidine [catalogue_number] => PA 19 0091007 [category_ids] => ,75,76,78,70,82, [chemical_name] => [weight] => 176.22 [form] => C9H12N4 [cas] => 1346600-82-5 [pslug] => 1346600-82-5-3-isobutylpyrazolo-4-3-d-pyrimidine-pa190091007 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 0091007
Molecular Formula : C9H12N4
Molecular Weight : 176.22
stdClass Object ( [pname] => De(methypiperazinyl) Sildenafil Dimer [catalogue_number] => PA 19 0091008 [category_ids] => ,75,76,78,70,82, [chemical_name] => [weight] => 686.79 [form] => C34H38N8O6S [cas] => 1346603-48-2 [pslug] => 1346603-48-2-de-methypiperazinyl-sildenafil-dimer-pa190091008 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 19 0091008
stdClass Object ( [pname] => Sildenafil Citrate (IPRSS015) [catalogue_number] => PA IPRSS015 [category_ids] => ,75,76,78,70,82, [chemical_name] => [weight] => NA [form] => NA [cas] => NA [pslug] => sildenafil-citrate-iprss015-paiprss015 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA IPRSS015
Molecular Formula : NA
Molecular Weight : NA
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