Fenspiride

芬司匹利

Also known as: Viarespan, Fluiden, Respiride, EINECS 225-751-3, UNII-S983QC7HKM, BRN 0533332, Fenspiridum, Fenspirida, 8-phenethyl-1-oxa-3,8-diazaspiro[4.5]decan-2-one, 8-(2-phenylethyl)-1-oxa-3,8-diazaspiro[4.5]decan-2-one

Fenspiride (CAS 5053-06-5) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C15H20N2O2 and a molecular weight of 260.332 g/mol. It is also known as Viarespan, Fluiden and Respiride. Key properties include a boiling point of 408.3±55.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 200.7±31.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 5053-06-5
Jingsj CID: J-1957200-4
Molecular Formula: C₁₅H₂₀N₂O₂
Chinese Name: 芬司匹利
Molecular Weight: 260.332 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

No offers for this compound yet.

Request a quote

Physicochemical Properties

Boiling Point	408.3±55.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	200.7±31.5 °C
Exact Mass	260.152466
PSA	41.57000
LogP	1.91
Vapor Pressure	0.0±1.0 mmHg at 25°C
Refractive Index	1.609

Activity & Biological Data

Target	-log IC50: 3.44 (PDE3); 4.16 (PDE4); approximately 3.8 (PDE5)[2]
Additional Information	[1]. Matuszewska A, et al. Long-term administration of fenspiride has no negative impact on bone mineral density and bone turnover in young growing rats. Adv Clin Exp Med. 2019 Jun;28(6):771-776. [2]. Cortijo J, et al. Effects of fenspiride on human bronchial cyclic nucleotide phosphodiesterase isoenzymes: functional and biochemical study. Eur J Pharmacol. 1998 Jan 2;341(1):79-86. [3]. De Castro CM, et al. Fenspiride: an anti-inflammatory drug with potential benefits in the treatment of endotoxemia. Eur J Pharmacol. 1995 Dec 29;294(2-3):669-76.

Target

-log IC50: 3.44 (PDE3); 4.16 (PDE4); approximately 3.8 (PDE5)[2]

Additional Information

[1]. Matuszewska A, et al. Long-term administration of fenspiride has no negative impact on bone mineral density and bone turnover in young growing rats. Adv Clin Exp Med. 2019 Jun;28(6):771-776. [2]. Cortijo J, et al. Effects of fenspiride on human bronchial cyclic nucleotide phosphodiesterase isoenzymes: functional and biochemical study. Eur J Pharmacol. 1998 Jan 2;341(1):79-86. [3]. De Castro CM, et al. Fenspiride: an anti-inflammatory drug with potential benefits in the treatment of endotoxemia. Eur J Pharmacol. 1995 Dec 29;294(2-3):669-76.

Customs & Trade Information

HS Code	2934999090
Summary	2934999090. other heterocyclic compounds. 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 Fenspiride?

The CAS number of Fenspiride is 5053-06-5.

What are the molecular formula and molecular weight of Fenspiride?

Fenspiride has molecular formula C15H20N2O2 and molecular weight 260.332 g/mol.

What are the upstream and downstream products of Fenspiride?

For Fenspiride, Upstream Products: Bis(trichloromethyl) carbonate, 4-(Aminomethyl)-1-phenethylpiperidin-4-ol, Diethyl carbonate.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Fenspiride (CAS 5053-06-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1957200-4 (accessed 2026-10-28).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.