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 E [catalogue_number] => PA 19 09050 [category_ids] => ,80,71,70,81, [chemical_name] => [weight] => 68.08 [form] => C3H4N2 [cas] => 288-32-4 [pslug] => 288-32-4-sildenafil-citrate-impurity-e-pa1909050 [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 09050
Molecular Formula : C3H4N2
Molecular Weight : 68.08
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 Aldehyde [catalogue_number] => PA 19 09510 [category_ids] => ,80,71,78,70,82, [chemical_name] => [weight] => 312.38 [form] => C14H20N2O4S [cas] => 332374-42-2 [pslug] => 332374-42-2-sildenafil-aldehyde-pa1909510 [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 09510
Molecular Formula : C14H20N2O4S
Molecular Weight : 312.38
stdClass Object ( [pname] => Sildenafil Chloro Impurity [catalogue_number] => PA 19 09540 [category_ids] => ,80,92, [chemical_name] => [weight] => 184.62 [form] => C9H9ClO2 [cas] => 42926-52-3 [pslug] => 42926-52-3-sildenafil-chloro-impurity-pa1909540 [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 09540
Molecular Formula : C9H9ClO2
Molecular Weight : 184.62
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] => O-Desethyl-O-propyl Methisosildenafil [catalogue_number] => PA 19 09600 [category_ids] => ,80,74,71,78,70,82, [chemical_name] => [weight] => 502.63 [form] => C24H34N6O4S [cas] => 1391053-82-9 [pslug] => 1391053-82-9-o-desethyl-o-propyl-methisosildenafil-pa1909600 [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 09600
Molecular Formula : C24H34N6O4S
Molecular Weight : 502.63
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 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] => 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] => (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] => (Z)-N'-(5-Chloro-4-methyl-2-propyl-1H-imidazol-1-yl)-2-ethoxybenzimidamide [catalogue_number] => PA 19 09710 [category_ids] => ,71,78,70,82,79,92,80, [chemical_name] => [weight] => 320.82 [form] => C16H21ClN4O [cas] => NA [pslug] => z-n-5-chloro-4-methyl-2-propyl-1h-imidazol-1-yl-2-ethoxybenzimidamide-pa1909710 [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 09710
Molecular Formula : C16H21ClN4O
Molecular Weight : 320.82
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] => 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] => 3-[[[5-(Aminocarbonyl)-1-methyl-3-propyl-1H-pyrazol-4-yl]amino]carbonyl]-4-propoxy-benzenesulfonyl Chloride [catalogue_number] => PA 19 09970 [category_ids] => ,80,71,78,70,82, [chemical_name] => [weight] => 442.92 [form] => C18H23ClN4O5S [cas] => 374776-34-8 [pslug] => 374776-34-8-3-5-aminocarbonyl-1-methyl-3-propyl-1h-pyrazol-4-yl-amino-carbonyl-4-propoxy-benzenesulfonyl-chloride-pa1909970 [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 09970
Molecular Formula : C18H23ClN4O5S
Molecular Weight : 442.92
stdClass Object ( [pname] => Chlorodenafil [catalogue_number] => PA 19 09820 [category_ids] => ,80,71,81,78,70,82, [chemical_name] => [weight] => 388.85 [form] => C19H21ClN4O3 [cas] => 1058653-74-9 [pslug] => 1058653-74-9-chlorodenafil-pa1909820 [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 09820
Molecular Formula : C19H21ClN4O3
Molecular Weight : 388.85
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] => 5-(5-Chlorosulfonyl-2-ethoxyphenyl)-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one [catalogue_number] => PA 19 09840 [category_ids] => ,80,71,122, [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-pa1909840 [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 09840
Molecular Formula : C16H17ClN4O4S
Molecular Weight : 396.85
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
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