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Heterocyclic building blocks

Fenspiride

Also known as Eurespal, Fenspirida, Viarespan

CAS 5053-06-5Formula C15H20N2O2Molar mass 260.34 g/molEC 225-751-3
GHS signal word: Warning. Pictograms: Harmful or irritant, Serious health hazard 5 suppliers listed
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Fenspiride chemical structure, C15H20N2O2, CAS 5053-06-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
5053-06-5
Formula
C15H20N2O2
Molar mass
260.34 g/mol
EC number
225-751-3
HS code
293499
Category
Heterocyclic building blocks

What is Fenspiride?

Plain description, key identifiers and synonyms

8-(2-phenylethyl)-1-oxa-3,8-diazaspiro[4.5]decan-2-one is an azaspiro compound.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
8-(2-phenylethyl)-1-oxa-3,8-diazaspiro[4.5]decan-2-one
CAS number
5053-06-5 CAS number cross-checked
EC numbers
225-751-3, 921-658-3
Molecular formula
C15H20N2O2
UNII
S983QC7HKM
MDL number
MFCD00867054
InChIKey
FVNFBBAOMBJTST-UHFFFAOYSA-N
InChI
InChI=1S/C15H20N2O2/c18-14-16-12-15(19-14)7-10-17(11-8-15)9-6-13-4-2-1-3-5-13/h1-5H,6-12H2,(H,16,18)
SMILES (canonical and isomeric)
C1CN(CCC12CNC(=O)O2)CCC3=CC=CC=C3

Synonyms

  • Eurespal
  • Fenspirida
  • Viarespan
  • Fenspiridum
  • Pneumorel
  • 1-Oxa-3,8-diazaspiro(4,5)decan-2-one, 8-(2-phenylethyl)-
  • 1-Oxa-3,8-diazaspiro(4.5)decan-2-one, 8-(2-phenylethyl)-
  • Decaspiride
  • Respiride
  • 8-(2-phenylethyl)-1-oxa-3,8-diazaspiro[4.5]decan-2-one
  • 8-Phenethyl-1-oxa-3,8-diaza-spiro[4.5]decan-2-one
  • 8-Phenethyl-1-oxa-3,8-diazaspiro[4.5]decan-2-one
  • Fenspiride (INN)
  • 8-Phenethyl-1-oxa-3,8-diazaspiro(4.5)decan-2-one
  • Eurespal (TN)
  • DivK1c_000526
  • Sdccgsbi-0050480.p004

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
260.34 g/molcalc.
Exact mass
260.1525 Dacalc.
LogP (octanol/water)
1.8calc.
Topological polar surface area
41.57 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
3calc.
Heavy atoms
19calc.
Rings
3calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.53calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=C1NCC2(CCN(CCc3ccccc3)CC2)O1

O=C1NCC2(CCN(CCc3ccccc3)CC2)O1

3 rings, 19 atoms. This chemical is the scaffold itself.

24 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H302Harmful if swallowed.
  • H361Suspected of damaging fertility or the unborn child.
  • H412Harmful to aquatic life with long lasting effects.
Precautionary statements (10)
  • P203Obtain, read and follow all safety instructions before use.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P318If exposed or concerned, get medical advice.
  • P330Rinse mouth.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Fenspiride suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 5 suppliers
5 of 5 offers
  • Capot
    China, HangzhouUnclaimed profile
    FenspirideGrade, purity and minimum order on request
    Price on request
    View
  • Chemenu. Inc.
    China, ShanghaiUnclaimed profile
    FenspirideGrade, purity and minimum order on request
    Price on request
    View
  • J&W PharmLab, LLC
    United States, LevittownUnclaimed profile
    FenspirideGrade, purity and minimum order on request
    Price on request
    View
  • Synblock Inc
    Canada, MontrealUnclaimed profile
    FenspirideGrade, purity and minimum order on request
    Price on request
    View
  • Thoreauchem
    China, HongKongUnclaimed profile
    FenspirideGrade, purity and minimum order on request
    Price on request
    View

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

5 suppliers in 3 countries

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Fenspiride price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Use classes: Pharmaceuticals.

Pharmacological actions

  • Bronchodilator Agents

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Fenspiride is traded under.

HS 2934.99Indicative HS code

Nucleic acids and their salts, other heterocyclic compounds, not elsewhere classified in heading 2934

World exports in 2024
$26.7B
+15.0% vs 2023, imports $26.3B
2019 to 2024
Top exporters
  1. Ireland26.3%
  2. China15.7%
  3. Singapore10.3%
Top importers
  1. United States24.5%
  2. Germany23.1%
  3. Japan4.5%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Fenspiride is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Fenspiride, based on the data on this page

What is Fenspiride?

8-(2-phenylethyl)-1-oxa-3,8-diazaspiro[4.5]decan-2-one is an azaspiro compound.

What is the CAS number of Fenspiride?

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

What is the molecular formula and weight of Fenspiride?

The molecular formula of Fenspiride is C15H20N2O2 and its molar mass is 260.34 g/mol.

What is Fenspiride used for?

Use classes: Pharmaceuticals.

Is Fenspiride hazardous?

Fenspiride carries the GHS signal word "Warning". Main hazards: harmful if swallowed, suspected of damaging fertility or the unborn child, harmful to aquatic life with long lasting effects. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Fenspiride?

Fenspiride is usually classified under HS code 293499 (Nucleic acids and their salts, whether or not chemically defined, other heterocyclic…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Fenspiride?

CompoundList lists 5 suppliers of Fenspiride in China, Canada and United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Fenspiride?

Suppliers quote Fenspiride on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Fenspiride

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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