Sildenafil Related Products 
Venkatasai is a leading innovator in the field of pharmaceutical reference standards, offering high-quality Reference Standards of Abacavir, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope-labeled compounds, and nitrosamines (N-NO products). Our Abacavir impurity reference standards play a vital role in pharmaceutical research, supporting product development, ANDA and DMF filings, quality control (QC), method validation, and stability studies. They are also instrumental in identifying unknown impurities and evaluating genotoxic potential. All Abacavir-related products are thoroughly characterized and supplied with comprehensive Certificates of Analysis (COA) and analytical data that comply with regulatory standards. EP/USP traceable standards can also be provided upon request. Furthermore, all supplied products undergo periodic re-testing to ensure continued quality and reliability.
2-ethoxybenzoic acid
CAT No: VS-S023026
CAS No: 134-11-2
Mol.F.: C9H10O3
Mol.Wt.: 166.2
Status: In Stock
2-Ethoxybenzoyl Chloride Impurity
CAT No: VS-S023010
CAS No: 42926-52-3
Mol.F.: C9H9ClO2
Mol.Wt.: 184.6
Status: In Stock
Amino Sildenafil
CAT No: VS-S023028
CAS No: 319491-68-4
Mol.F.: C18H23N5O4S
Mol.Wt.: 405.5
Status: In Stock
Chlorosulfone O-Desethyl Impurit
CAT No: VS-S023016
CAS No: 139756-27-7
Mol.F.: C15H15ClN4O4S
Mol.Wt.: 382.8
Status: Custom Synthesis
Demethylpiperazinyl Iso Sildenafil Sulfonyl Chloride
CAT No: VS-S023014
CAS No: 501120-42-9
Mol.F.: C17H19ClN4O4S
Mol.Wt.: 410.9
Status: Custom Synthesis
Des(methylpiperazinyl) Chlorosulfone Impurity
CAT No: VS-S023017
CAS No: 139756-31-3
Mol.F.: C16H17ClN4O4S
Mol.Wt.: 396.9
Status: Custom Synthesis
Homo Sildenafil
CAT No: VS-S023040
CAS No: 642928-07-2
Mol.F.: C23H32N6O4S
Mol.Wt.: 488.61
Status: In Stock
Iso Sildenafil
CAT No: VS-S023023
CAS No: 253178-46-0
Mol.F.: C22H30N6O4S
Mol.Wt.: 474.6
Status: Custom Synthesis
Isobutylpyrazolopyrimidine Impurity
CAT No: VS-S023020
CAS No: 1346600-82-5
Mol.F.: C9H12N4
Mol.Wt.: 176.2
Status: Custom Synthesis
N-Desmethyl Sildenafil-N-β-D-Glucuronide
CAT No: VS-S023030
CAS No: N/A
Mol.F.: C27H35N6O10S : Na
Mol.Wt.: 635.7 : 23.0
Status: Custom Synthesis
Sildenafil
CAT No: VS-S023000
CAS No: 139755-83-2
Mol.F.: C22H30N6O4S
Mol.Wt.: 474.6
Status: Custom Synthesis
Sildenafil Acid Impurity
CAT No: VS-S023024
CAS No: 139756-00-6
Mol.F.: C8H11N3O4
Mol.Wt.: 213.2
Status: In Stock
Sildenafil Amino Amide Impurity
CAT No: VS-S023011
CAS No: 139756-02-8
Mol.F.: C8H14N4O
Mol.Wt.: 182.2
Status: Custom Synthesis
Sildenafil Carboxylic Acid Impurity
CAT No: VS-S023012
CAS No: 147676-78-6
Mol.F.: C18H20N4O4
Mol.Wt.: 356.4
Status: Custom Synthesis
Sildenafil Chloroacetyl Impurity
CAT No: VS-S023013
CAS No: 1058653-74-9
Mol.F.: C19H21ClN4O3
Mol.Wt.: 388.9
Status: Custom Synthesis
Sildenafil Chlorosulfone Impurity
CAT No: VS-S023015
CAS No: 139756-22-2
Mol.F.: C17H19ClN4O4S
Mol.Wt.: 410.9
Status: Custom Synthesis
Sildenafil Citrate
CAT No: VS-S023029
CAS No: 171599-83-0
Mol.F.: C22H30N6O4S : C6H8O7
Mol.Wt.: 474.6 : 192.1
Status: Custom Synthesis
Sildenafil D8
CAT No: VS-S023041
CAS No: 951385-68-5
Mol.F.: C22H22D8N6O4S
Mol.Wt.: 482.6
Status: Custom Synthesis
Sildenafil Descarbon Impurity
CAT No: VS-S023018
CAS No: 1393816-99-3
Mol.F.: C21H30N6O4S
Mol.Wt.: 462.6
Status: Custom Synthesis
Sildenafil Di-Amide Impurity
CAT No: VS-S023019
CAS No: 139756-03-9
Mol.F.: C17H22N4O3
Mol.Wt.: 330.4
Status: In Stock
Sildenafil EP Impurity A
CAT No: VS-S023001
CAS No: 1391053-95-4
Mol.F.: C23H32N6O4S
Mol.Wt.: 488.6
Status: In Stock
Sildenafil EP Impurity B
CAT No: VS-S023002
CAS No: 1094598-75-0
Mol.F.: C22H30N6O5S
Mol.Wt.: 490.6
Status: In Stock
Sildenafil EP Impurity C
CAT No: VS-S023004
CAS No: 139755-91-2
Mol.F.: C20H26N6O4S
Mol.Wt.: 446.5
Status: In Stock
Sildenafil EP Impurity D
CAT No: VS-S023006
CAS No: 1357931-55-5
Mol.F.: C17H20N4O5S
Mol.Wt.: 392.4
Status: In Stock
Sildenafil EP Impurity E
CAT No: VS-S023007
CAS No: 288-32-4
Mol.F.: C3H4N2
Mol.Wt.: 68.1
Status: In Stock
Sildenafil EP Impurity F
CAT No: VS-S023008
CAS No: 139755-82-1
Mol.F.: C21H28N6O4S
Mol.Wt.: 460.6
Status: In Stock
Sildenafil EP Impurity G
CAT No: VS-S023009
CAS No: 1346602-67-2
Mol.F.: C38H46N10O8S2
Mol.Wt.: 835
Status: In Stock
Sildenafil Impurity 1
CAT No: VS-S023031
CAS No: 501120-38-3
Mol.F.: C17H22N4O3
Mol.Wt.: 330.4
Status: Custom Synthesis
Sildenafil Impurity 10
CAT No: VS-S023042
CAS No: 360068-47-9
Mol.F.: C8H10ClN3O3
Mol.Wt.: 231.64
Status: In Stock
Sildenafil Impurity 2
CAT No: VS-S023032
CAS No: 1004455-71-3
Mol.F.: C9H13N3O4
Mol.Wt.: 227.2
Status: Custom Synthesis
Sildenafil Impurity 3
CAT No: VS-S023033
CAS No: 1467610-65-6
Mol.F.: C18H22N4O2
Mol.Wt.: 326.4
Status: Custom Synthesis
Sildenafil Impurity 4
CAT No: VS-S023034
CAS No: 911715-34-9
Mol.F.: C9H14N4O3
Mol.Wt.: 226.2
Status: Custom Synthesis
Sildenafil Impurity 5
CAT No: VS-S023035
CAS No: 247583-78-4
Mol.F.: C8H14N4O
Mol.Wt.: 182.2
Status: Custom Synthesis
Sildenafil Impurity 6
CAT No: VS-S023036
CAS No: 268204-00-8
Mol.F.: C9H16N4O
Mol.Wt.: 196.3
Status: Custom Synthesis
Sildenafil Impurity 7
CAT No: VS-S023037
CAS No: 247583-72-8
Mol.F.: C8H12N4O3
Mol.Wt.: 212.2
Status: In Stock
Sildenafil Impurity 8
CAT No: VS-S023038
CAS No: 139755-98-9
Mol.F.: C23H32N6O4S
Mol.Wt.: 488.6
Status: Custom Synthesis
Sildenafil Impurity 9
CAT No: VS-S023039
CAS No: N/A
Mol.F.: C22H30N6O5S
Mol.Wt.: 490.6
Status: Custom Synthesis
Sildenafil Impurity B
CAT No: VS-S023003
CAS No: 200575-15-1
Mol.F.: C22H32N6O5S
Mol.Wt.: 492.6
Status: Custom Synthesis
Sildenafil Impurity C
CAT No: VS-S023005
CAS No: 139755-95-6
Mol.F.: C21H28N6O4S
Mol.Wt.: 460.6
Status: Custom Synthesis
Sildenafil Lactam Impurity
CAT No: VS-S023021
CAS No: 139756-21-1
Mol.F.: C17H20N4O2
Mol.Wt.: 312.4
Status: In Stock
Sildenafil Methyl Sulfonate Ester Impurity
CAT No: VS-S023027
CAS No: 2512206-40-3
Mol.F.: C18H22N4O5S
Mol.Wt.: 406.5
Status: In Stock
Sildenafil N-Desmethyl Thione Impurity
CAT No: VS-S023022
CAS No: 479073-86-4
Mol.F.: C21H28N6O3S2
Mol.Wt.: 476.6
Status: Custom Synthesis
Sildenafil Nitroamide
CAT No: VS-S023025
CAS No: 139756-01-7
Mol.F.: C8H12N4O3
Mol.Wt.: 212.2
Status: In Stock
