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Heterocyclic building blocks

Ethadione

Also known as Epinyl, Petisan, Neo-Absentol

CAS 520-77-4Formula C7H11NO3Molar mass 157.17 g/molEC 208-297-0
GHS signal word: Warning. Pictograms: Harmful or irritant
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Ethadione chemical structure, C7H11NO3, CAS 520-77-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
520-77-4
Formula
C7H11NO3
Molar mass
157.17 g/mol
EC number
208-297-0
HS code
293499
Category
Heterocyclic building blocks

What is Ethadione?

Plain description, key identifiers and synonyms

Ethadione is an oxazolidinone.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
3-ethyl-5,5-dimethyl-1,3-oxazolidine-2,4-dione
CAS number
520-77-4 CAS number cross-checked
EC number
208-297-0
Molecular formula
C7H11NO3
UNII
I0F8O700BB
InChIKey
SIGSNYAYBSJATD-UHFFFAOYSA-N
InChI
InChI=1S/C7H11NO3/c1-4-8-5(9)7(2,3)11-6(8)10/h4H2,1-3H3
SMILES (canonical and isomeric)
CCN1C(=O)C(OC1=O)(C)C

Synonyms

  • Epinyl
  • Petisan
  • Neo-Absentol
  • 3-ethyl-5,5-dimethyl-1,3-oxazolidine-2,4-dione
  • 3-Ethyl-5,5-dimethyl-2,4-oxazolidinedione
  • 3-Ethyl-5,5-dimethyl-2,4-diketooxazolidine
  • Petidion
  • Ethadionum
  • Didione
  • Dimedion
  • Aethadion
  • Dimedione
  • Petidiol
  • 3-Ethyl-5,5-dimethyloxazolidine-2,4-dione
  • Ethylmethyloxyzolidin-dion
  • 3-Ethyl-5,5-dimethyl-2,4-oxazolinedione
  • 2, 3-ethyl-5,5-dimethyl-
  • 2,4-Oxazolidinedione, 3-ethyl-5,5-dimethyl-

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
157.17 g/molcalc.
Exact mass
157.0739 Dacalc.
LogP (octanol/water)
0.76calc.
Topological polar surface area
46.61 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
1calc.
Heavy atoms
11calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.71calc.
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=C1COC(=O)N1

O=C1COC(=O)N1

1 ring, 7 atoms, the 2,4-Oxazolidinedione ring system.

100 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

Hazard statements

  • H319Causes serious eye irritation.
Precautionary statements (4)
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P337 + P317If eye irritation persists: Get medical help.

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

Ethadione suppliers

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Ethadione 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

Roles

  • anticonvulsant
  • central nervous system depressant
  • central nervous system drug
  • pharmaceutical

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 Ethadione 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 Ethadione is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Ethadione?

Ethadione is an oxazolidinone.

What is the CAS number of Ethadione?

The CAS registry number of Ethadione is 520-77-4.

What is the molecular formula and weight of Ethadione?

The molecular formula of Ethadione is C7H11NO3 and its molar mass is 157.17 g/mol.

What is Ethadione used for?

Known uses and roles of Ethadione include building blocks in research and laboratory, screening compounds in research and laboratory, anticonvulsant, central nervous system depressant, central nervous system drug and 1 more.

Is Ethadione hazardous?

Ethadione carries the GHS signal word "Warning". Main hazards: causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Ethadione?

Ethadione 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 Ethadione?

Post a free request on CompoundList and suppliers of Ethadione will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Ethadione?

Suppliers quote Ethadione 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 Ethadione

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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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