Sildenafil Citrate

    WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 318693

CAS#: 171599-83-0 (citrate)

Description: Sildenafil is a selective inhibitor of PDE5 (type 5 cGMP phosphodiesterase) which catalyzes the hydrolysis of 3',5'-cyclic guanosine monophosphate (cGMP). As a PDE5 inhibitor, Sildenafil has been reported to enhance neuro-, synapto- and angiogenesis in rat models of stroke and also is reported to be a mild vasodilator. Sildenafil has also been shown to prevent indomethacin-induced small intestinal ulceration formation through an NO/cGMP- dependent mechanism.

Price and Availability

Size Price Shipping out time Quantity
500mg USD 150 Same day
1g USD 250 Same day
2g USD 450 Same day
5g USD 850 Same day
10g USD 1250 Same day
20g USD 2150 Same day
50g USD 3850 Same day
100g USD 4950 2 Weeks
Inquire bulk and customized quantity

Pricing updated 2021-01-26. Prices are subject to change without notice.

Sildenafil Citrate, purity > 98%, is in stock. The same day shipping out after order is received.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 318693
Name: Sildenafil Citrate
CAS#: 171599-83-0 (citrate)
Chemical Formula: C28H38N6O11S
Exact Mass:
Molecular Weight: 666.7
Elemental Analysis: C, 50.44; H, 5.75; N, 12.61; O, 26.40; S, 4.81

Related CAS #: 139755-83-2 (free base)   171599-83-0 (citrate)   252951-59-0 (nitrate)    

Synonym: Sildenafil Citrate; UK 92480-10; UK-92,480-10. Trade name: Revatio; VIAGRA.

IUPAC/Chemical Name: 5-(2-ethoxy-5-((4-methylpiperazin-1-yl)sulfonyl)phenyl)-1-methyl-3-propyl-1,4-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one 2-hydroxypropane-1,2,3-tricarboxylate


InChi Code: InChI=1S/C22H30N6O4S.C6H8O7/c1-5-7-17-19-20(27(4)25-17)22(29)24-21(23-19)16-14-15(8-9-18(16)32-6-2)33(30,31)28-12-10-26(3)11-13-28;7-3(8)1-6(13,5(11)12)2-4(9)10/h8-9,14H,5-7,10-13H2,1-4H3,(H,23,24,29);13H,1-2H2,(H,7,8)(H,9,10)(H,11,12)

SMILES Code: CCCC1=NN(C2=C1NC(=NC2=O)C3=C(C=CC(=C3)S(=O)(=O)N4CCN(CC4)C)OCC)C.C(C(=O)O)C(CC(=O)O)(C(=O)O)O

Technical Data

Solid powder

>98% (or refer to the Certificate of Analysis)

Certificate of Analysis:

Safety Data Sheet (SDS):

Shipping Condition:
Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition:
Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Soluble in DMSO, not in water

Shelf Life:
>2 years if stored properly

Drug Formulation:
This drug may be formulated in DMSO

Stock Solution Storage:
0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code:

Additional Information

Related CAS#
CAS#139755-83-2 (Sildenafil [INN:BAN])


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