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Periodic Table/Compounds/sildenafil

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© Melvin Olsson 2025–2026
Data: IAEA & PubChem

sildenafil

C₂₂H₃₀N₆O₄S·474.600 g/mol·CID 135398744

IUPAC: 5-[2-ethoxy-5-(4-methylpiperazin-1-yl)sulfonylphenyl]-1-methyl-3-propyl-6H-pyrazolo[4,5-d]pyrimidin-7-one

Also known as: 139755-83-2, Aphrodil, Vizarsin, Sildenafilo, Patrex (+14 more)

2D structure of sildenafil

Molecular Structure

Molecular Propertiesmass · H-bonds · stereo

Molecular Weight

474.600g/mol

Exact Mass

474.204925Da

Monoisotopic Mass

474.204925Da

XLogP

1.5

Polar Surface Area

118.0Ų

Complexity

838

Formal Charge

0

H-Bond Donors

1

H-Bond Acceptors

8

Rotatable Bonds

7

Heavy Atoms

33

Stereo Centers

0

Bond Stereo

0

Drug-Likeness (Lipinski's Rule of Five)

✓ 474.6 g/mol
MW ≤ 500
✓ 1.5
LogP ≤ 5
✓ 1
H-bond donors ≤ 5
✓ 8
H-bond acceptors ≤ 10

Passes all rules — good oral bioavailability predicted

GHS Hazard Classification

Warning
Irritant
Irritant
Hazards
  • H302Harmful if swallowed
  • H319Causes serious eye irritation
  • H412Harmful to aquatic life with long lasting effects
  • H315Causes skin irritation
  • H335May cause respiratory irritation

Source: PubChem GHS Classification. Always consult the SDS for handling.

Chemical IdentifiersSMILES · InChI

InChI

InChI=1S/C22H30N6O4S/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/h8-9,14H,5-7,10-13H2,1-4H3,(H,23,24,29)

External Resources

PubChem ↗Wikipedia ↗