Cilostazol

Also known as: 6-[4-(1-Cyclohexyl-1H-tetrazol-5-yl)butoxy]-3,4-dihydro-2(1H)-quinolinone, Pletal, OPC-13013, OPC 21, Cilostal, RETAL, PLETAAL, CILASTAZOL, CILOSTAZOLE, 6-[4-(1-Cyclohexyl-1H-tetrazol-5-yl)butoxy]-3,4-dihydroquinolin-2(1H)-one, MFCD00866780

Cilostazol (CAS 73963-72-1) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C20H27N5O2 and a molecular weight of 369.461 g/mol. Key properties include a melting point of 159-160ºC, a boiling point of 664.7±55.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 355.8±31.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 73963-72-1
Jingsj CID: J-14416-1
Molecular Formula: C₂₀H₂₇N₅O₂
Molecular Weight: 369.461 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	159-160ºC
Boiling Point	664.7±55.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	355.8±31.5 °C
Exact Mass	369.216461
PSA	81.93000
LogP	3.05
Vapor Pressure	0.0±2.0 mmHg at 25°C
Refractive Index	1.676
Storage Conditions	Store at RT
Additional Property	DMSO: 18 mg/mL, soluble

Activity & Biological Data

Additional Information	[1]. Schr?r K. The pharmacology of cilostazol. Diabetes Obes Metab. 2002 Mar;4 Suppl 2:S14-9. [2]. Cone J, et al. Comparison of the effects of cilostazol and milrinone on intracellular cAMP levels and cellular function in platelets and cardiac cells. J Cardiovasc Pharmacol. 1999 Oct;34(4):497-504. [3]. Minami N, et al. Inhibition of shear stress-induced platelet aggregation by cilostazol, a specific inhibitor of cGMP-inhibited phosphodiesterase, in vitro and ex vivo. Life Sci. 1997;61(25):PL 383-9. [4]. Saito S, et al. Cilostazol attenuates hepatic stellate cell activation and protects mice against carbon tetrachloride-induced liver fibrosis. Hepatol Res. 2013 Apr 19. [5]. Jang JS, et al. A meta-analysis of randomized controlled trials appraising the efficacy and safety of cilostazol after coronary artery stent implantation. Cardiology. 2012;122(3):133-43.

Additional Information

[1]. Schr?r K. The pharmacology of cilostazol. Diabetes Obes Metab. 2002 Mar;4 Suppl 2:S14-9. [2]. Cone J, et al. Comparison of the effects of cilostazol and milrinone on intracellular cAMP levels and cellular function in platelets and cardiac cells. J Cardiovasc Pharmacol. 1999 Oct;34(4):497-504. [3]. Minami N, et al. Inhibition of shear stress-induced platelet aggregation by cilostazol, a specific inhibitor of cGMP-inhibited phosphodiesterase, in vitro and ex vivo. Life Sci. 1997;61(25):PL 383-9. [4]. Saito S, et al. Cilostazol attenuates hepatic stellate cell activation and protects mice against carbon tetrachloride-induced liver fibrosis. Hepatol Res. 2013 Apr 19. [5]. Jang JS, et al. A meta-analysis of randomized controlled trials appraising the efficacy and safety of cilostazol after coronary artery stent implantation. Cardiology. 2012;122(3):133-43.

Customs & Trade Information

HS Code	2933990090
Summary	2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of Cilostazol?

The CAS number of Cilostazol is 73963-72-1.

What are the molecular formula and molecular weight of Cilostazol?

Cilostazol has molecular formula C20H27N5O2 and molecular weight 369.461 g/mol.

What are the upstream and downstream products of Cilostazol?

For Cilostazol, Upstream Products: 6-Hydroxy-3,4-dihydroquinolin-2(1H)-one, 5-(4-Chlorobutyl)-1-cyclohexyl-1H-tetrazole.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Cilostazol (CAS 73963-72-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-14416-1 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.