Sildenafil citrate
Also known as: Sildenafil citrate salt, Viagra, Revatio, 1-[[3-(6,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulfonyl]-4-methylpiperazine citrate, 5-[2-Ethoxy-5-[(4-methylpiperazin-1-yl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one citrate, 1-[[3-(4,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulfonyl]-4-methylpiperazine citrate salt, Sildenafil (citrate), Caverta
Sildenafil citrate (CAS 171599-83-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C28H38N6O11S and a molecular weight of 666.700 g/mol. Key properties include a melting point of 187-189ºC, a boiling point of 672.4ºC at 760 mmHg, a density of 1.447g/cm3 and a flash point of 360.5ºC. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 171599-83-0
- Jingsj CID
- J-1958718-9
- Molecular Formula
- C28H38N6O11S
- Molecular Weight
- 666.700 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 187-189ºC |
|---|---|
| Boiling Point | 672.4ºC at 760 mmHg |
| Density | 1.447g/cm3 |
| Flash Point | 360.5ºC |
| Exact Mass | 666.231934 |
| PSA | 253.93000 |
| LogP | 1.31900 |
| Vapor Pressure | 0mmHg at 25°C |
| Refractive Index | 1.683 |
| Storage Conditions | Desiccate at RT |
| Stability | Store in Freezer |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Target | IC50: 5.22 nM (PDE 5)[1] |
|---|---|
| Additional Information | [1]. Wang Z, et al. The Selectivity and Potency of the New PDE5 Inhibitor TPN729MA. J Sex Med. 2013 Nov;10(11):2790-7. [2]. Li BB, et al. Sildenafil potentiates the proliferative effect of porcine pulmonary artery smooth muscle cells induced by serotonin in vitro. Chin Med J (Engl). 2011 Sep;124(17):2733-40. [3]. Moretti R, et al. Sildenafil, a cyclic GMP phosphodiesterase inhibitor, induces microglial modulation after focal ischemia in the neonatal mouse brain. J Neuroinflammation. 2016 Apr 28;13(1):95. [4]. Korkmaz MF, et al. The Effect of Sildenafil on Recuperation from Sciatic Nerve Injury in Rats. Balkan Med J. 2016 Mar;33(2):204-11. |
Customs & Trade Information
| HS Code | 2935009090 |
|---|---|
| Summary | 2935009090 other sulphonamides VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:35.0% |
Frequently Asked Questions
What is the CAS number of Sildenafil citrate?
The CAS number of Sildenafil citrate is 171599-83-0.
What are the molecular formula and molecular weight of Sildenafil citrate?
Sildenafil citrate has molecular formula C28H38N6O11S and molecular weight 666.700 g/mol.
Is Sildenafil citrate hazardous?
Sildenafil citrate has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Sildenafil citrate (CAS 171599-83-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1958718-9 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.