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 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] => 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] => 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] => 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
Molecular Formula : C34H38N8O6S
Molecular Weight : 686.79
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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