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 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
CAS :
Molecular Formula : C20H26N6O4S
Molecular Weight : 446.52
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] => 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_number] => PA 19 09590 [category_ids] => ,80,71,78,70,82,121,88, [chemical_name] => [weight] => 479.55 [form] => C21H29N5O6S [cas] => 226956-43-0 [pslug] => 226956-43-0-4-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-pa1909590 [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 09590
Molecular Formula : C21H29N5O6S
Molecular Weight : 479.55
stdClass Object ( [pname] => Propoxyphenyl Homohydroxysildenafil [catalogue_number] => PA 19 09610 [category_ids] => ,79,80,88, [chemical_name] => [weight] => 518.63 [form] => C24H34N6O5S [cas] => 139755-87-6 [pslug] => 139755-87-6-propoxyphenyl-homohydroxysildenafil-pa1909610 [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 09610
Molecular Formula : C24H34N6O5S
Molecular Weight : 518.63
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 Formula : C23H32N6O4S
Molecular Weight : 488.6
stdClass Object ( [pname] => Descarbonsildenafil [catalogue_number] => PA 19 09630 [category_ids] => ,79,80,78,70,82,88, [chemical_name] => [weight] => 462.57 [form] => C21H30N6O4S [cas] => 1393816-99-3 [pslug] => 1393816-99-3-descarbonsildenafil-pa1909630 [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 09630
Molecular Formula : C21H30N6O4S
Molecular Weight : 462.57
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] => (Z)-N'-(5-Chloro-4-methyl-2-propyl-1H-imidazol-1-yl)-2-ethoxy-5-((4-ethylpiperazin-1-yl)sulfonyl)benzimidamide [catalogue_number] => PA 19 09700 [category_ids] => ,71,78,70,82,79,92,80,88, [chemical_name] => [weight] => 497.05 [form] => C22H33ClN6O3S [cas] => NA [pslug] => z-n-5-chloro-4-methyl-2-propyl-1h-imidazol-1-yl-2-ethoxy-5-4-ethylpiperazin-1-yl-sulfonyl-benzimidamide-pa1909700 [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 09700
Molecular Formula : C22H33ClN6O3S
Molecular Weight : 497.05
stdClass Object ( [pname] => (E)-4-((2-Ethoxybenzylidene)amino)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide [catalogue_number] => PA 19 09720 [category_ids] => ,71,78,70,82,88,79,92, [chemical_name] => [weight] => 314.38 [form] => C17H22N4O2 [cas] => 845302-49-0 [pslug] => 845302-49-0-e-4-2-ethoxybenzylidene-amino-1-methyl-3-propyl-1h-pyrazole-5-carboxamide-pa1909720 [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 09720
Molecular Formula : C17H22N4O2
Molecular Weight : 314.38
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] => 4-(2-Ethoxybenzamido)-3-isobutyl-1-methyl-1H-pyrazole-5-carboxamide [catalogue_number] => PA 19 09770 [category_ids] => ,71,78,70,82,88, [chemical_name] => [weight] => 344.42 [form] => C18H24N4O3 [cas] => 1467610-62-3 [pslug] => 1467610-62-3-4-2-ethoxybenzamido-3-isobutyl-1-methyl-1h-pyrazole-5-carboxamide-pa1909770 [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 09770
Molecular Formula : C18H24N4O3
Molecular Weight : 344.42
stdClass Object ( [pname] => Homo Sildenafil [catalogue_number] => PA 19 09780 [category_ids] => ,71,78,70,82,88, [chemical_name] => [weight] => 488.61 [form] => C23H32N6O4S [cas] => 642928-07-2 [pslug] => 642928-07-2-homo-sildenafil-pa1909780 [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 09780
Molecular Weight : 488.61
stdClass Object ( [pname] => S-des[2-(1-Methyl-2-pyrrolidinyl)ethyl]amine S-Hydroxy Udenafil [catalogue_number] => PA 19 09790 [category_ids] => ,71,78,70,82,88, [chemical_name] => [weight] => 406.46 [form] => C18H22N4O5S [cas] => 2761158-33-0 [pslug] => 2761158-33-0-s-des-2-1-methyl-2-pyrrolidinyl-ethyl-amine-s-hydroxy-udenafil-pa1909790 [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 09790
Molecular Formula : C18H22N4O5S
Molecular Weight : 406.46
stdClass Object ( [pname] => Propoxyphenyl-thiohydroxyhomosildenafil [catalogue_number] => PA 19 09800 [category_ids] => ,79,80,74,71,88, [chemical_name] => [weight] => 534.69 [form] => C24H34N6O4S2 [cas] => 479073-90-0 [pslug] => 479073-90-0-propoxyphenyl-thiohydroxyhomosildenafil-pa1909800 [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 09800
Molecular Formula : C24H34N6O4S2
Molecular Weight : 534.69
stdClass Object ( [pname] => Thiodimethylsildenafil [catalogue_number] => PA 19 09810 [category_ids] => ,79,80,76,74,71,88, [chemical_name] => [weight] => 504.67 [form] => C23H32N6O3S2 [cas] => 1260112-90-0 [pslug] => 1260112-90-0-thiodimethylsildenafil-pa1909810 [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 09810
Molecular Formula : C23H32N6O3S2
Molecular Weight : 504.67
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] => Ethyl 4-ethoxy-3-(1-methyl-7-oxo-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonate [catalogue_number] => PA 19 09880 [category_ids] => ,74,71,78,70,82,88, [chemical_name] => [weight] => 420.48 [form] => C19H24N4O5S [cas] => 1971915-89-5 [pslug] => 1971915-89-5-ethyl-4-ethoxy-3-1-methyl-7-oxo-3-propyl-6-7-dihydro-1h-pyrazolo-4-3-d-pyrimidin-5-yl-benzenesulfonate-pa1909880 [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 09880
Molecular Formula : C19H24N4O5S
Molecular Weight : 420.48
stdClass Object ( [pname] => 2-Ethoxy-5-(ethoxysulfonyl)benzoic Acid [catalogue_number] => PA 19 09890 [category_ids] => ,74,71,78,70,82,88, [chemical_name] => [weight] => 274.29 [form] => C11H14O6S [cas] => 2731926-23-9 [pslug] => 2731926-23-9-2-ethoxy-5-ethoxysulfonyl-benzoic-acid-pa1909890 [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 09890
Molecular Formula : C11H14O6S
Molecular Weight : 274.29
stdClass Object ( [pname] => Ethyl 2-ethoxy-5-(ethoxysulfonyl)benzoate [catalogue_number] => PA 19 09900 [category_ids] => ,74,71,78,70,82,88, [chemical_name] => [weight] => 302.34 [form] => C13H18O6S [cas] => NA [pslug] => ethyl-2-ethoxy-5-ethoxysulfonyl-benzoate-pa1909900 [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 09900
Molecular Formula : C13H18O6S
Molecular Weight : 302.34
stdClass Object ( [pname] => Methyl 2-ethoxy-5-(methoxysulfonyl)benzoate [catalogue_number] => PA 19 09910 [category_ids] => ,74,71,78,70,82,88, [chemical_name] => [weight] => 274.29 [form] => C11H14O6S [cas] => NA [pslug] => methyl-2-ethoxy-5-methoxysulfonyl-benzoate-pa1909910 [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 09910
stdClass Object ( [pname] => 2-Ethoxy-5-((4-ethylpiperazin-1-yl)sulfonyl)benzoic Acid [catalogue_number] => PA 19 09920 [category_ids] => ,74,71,78,70,82,88, [chemical_name] => [weight] => 342.41 [form] => C15H22N2O5S [cas] => 1245644-35-2 [pslug] => 1245644-35-2-2-ethoxy-5-4-ethylpiperazin-1-yl-sulfonyl-benzoic-acid-pa1909920 [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 09920
Molecular Formula : C15H22N2O5S
Molecular Weight : 342.41
stdClass Object ( [pname] => 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_number] => PA 19 09930 [category_ids] => ,74,71,78,70,82,88, [chemical_name] => [weight] => 460.55 [form] => C21H28N6O4S [cas] => 263897-18-3 [pslug] => 263897-18-3-5-2-methoxy-5-4-methylpiperazin-1-yl-sulfonyl-phenyl-1-methyl-3-propyl-1-6-dihydro-7h-pyrazolo-4-3-d-pyrimidin-7-one-pa1909930 [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 09930
Molecular Formula : C21H28N6O4S
Molecular Weight : 460.55
stdClass Object ( [pname] => 4-(2-Methoxy-5-((4-methylpiperazin-1-yl)sulfonyl)benzamido)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide [catalogue_number] => PA 19 09940 [category_ids] => ,74,71,78,70,82,88, [chemical_name] => [weight] => 478.57 [form] => C21H30N6O5S [cas] => 263897-17-2 [pslug] => 263897-17-2-4-2-methoxy-5-4-methylpiperazin-1-yl-sulfonyl-benzamido-1-methyl-3-propyl-1h-pyrazole-5-carboxamide-pa1909940 [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 09940
stdClass Object ( [pname] => 4-(2-Methoxy-5-((4-methylpiperazin-1-yl)sulfonyl)phenyl)-1-methyl-3-propyl-1H-pyrazole-5-carboxamide [catalogue_number] => PA 19 09950 [category_ids] => ,74,71,78,70,82,88, [chemical_name] => [weight] => 435.54 [form] => C20H29N5O4S [cas] => NA [pslug] => 4-2-methoxy-5-4-methylpiperazin-1-yl-sulfonyl-phenyl-1-methyl-3-propyl-1h-pyrazole-5-carboxamide-pa1909950 [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 09950
Molecular Formula : C20H29N5O4S
Molecular Weight : 435.54
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