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Heterocyclic building blocks

Paramethadione

Also known as Parametadione, Paradione, Isoethadione

CAS 115-67-3Formula C7H11NO3Molar mass 157.17 g/molEC 204-098-8
GHS signal word: Danger. Pictograms: Harmful or irritant, Serious health hazard 3 suppliers listed
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Paramethadione chemical structure, C7H11NO3, CAS 115-67-3
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Clear, colorless liquid
Melting point
31 to 32
Boiling point
101 to 102
Density
1.118-1.1240 @ 25 °C/4 DEG
Solubility
SLIGHTLY SOL IN WATER, FREELY SOL IN ALCOHOL, BENZENE, CHLOROFORM, ETHER
HS code
293499
Category
Heterocyclic building blocks
Illustrative photo, clear liquid in a volumetric flask on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Paramethadione?

Plain description, key identifiers and synonyms

Paramethadione is an oxazolidinone. It has a role as an anticonvulsant. It is functionally related to a 5-ethyl-5-methyl-1,3-oxazolidine-2,4-dione.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
5-ethyl-3,5-dimethyl-1,3-oxazolidine-2,4-dione
CAS number
115-67-3 CAS number cross-checked
EC number
204-098-8
Molecular formula
C7H11NO3
UNII
Z615FRW64N
InChIKey
VQASKUSHBVDKGU-UHFFFAOYSA-N
InChI
InChI=1S/C7H11NO3/c1-4-7(2)5(9)8(3)6(10)11-7/h4H2,1-3H3
SMILES (canonical and isomeric)
CCC1(C(=O)N(C(=O)O1)C)C

Synonyms

  • Parametadione
  • Paradione
  • Isoethadione
  • 5-Ethyl-3,5-dimethyl-1,3-oxazolidine-2,4-dione
  • Paramethadionum
  • Parametadiona
  • 2,4-Oxazolidinedione, 5-ethyl-3,5-dimethyl-
  • 3,5-Dimethyl-5-ethyloxazolidine-2,4-dione
  • 5-Ethyl-3,5-dimethyl-2,4-oxazolidinedione
  • 5-ethyl-3,5-dimethyloxazolinedione
  • 5-Ethyl-3,5-dimethyloxazolidine-2,4-dione
  • Paramethadione-d3
  • Paramethadione (INN)
  • Isoethadione, Paradione
  • Paradione (TN)
  • paramethadione (500 mg)
  • 4-27-00-03255 (Beilstein Handbook Reference)
  • 5-Ethyl-3,5-dimethyl-1,3-oxazolidine-2,4-dione #

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

Appearance
Clear, colorless liquidexp.
Odour
FRUITY, ESTERLIKE ODORexp.
Melting point
31 to 32exp.
Boiling point
101 to 102exp.
Density
1.118-1.1240 @ 25 °C/4 DEGexp.
Solubility
SLIGHTLY SOL IN WATER, FREELY SOL IN ALCOHOL, BENZENE, CHLOROFORM, ETHERexp.

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
1calc.
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
Danger
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
  • H360May damage fertility or the unborn child.
Precautionary statements (18)
  • P203Obtain, read and follow all safety instructions before use.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P318If exposed or concerned, get medical advice.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • 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

Paramethadione suppliers

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

All 3 suppliers

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

3 suppliers in 1 country

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Paramethadione price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Veterinary medication:.

Therapeutic category: Anticonvulsant.

Roles

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

How it is made

Spielman, us patent 2,575,693 (1951 to abbott).

Ethyl alpha-hydroxy-alpha-methylbutyrate & urea...refluxed for 24 hr in presence of sodium methoxide, resulting in condensation cyclization with formation of sodium deriv of 5-ethyl-5-methyl-2,4-oxazolidinedione. After distilling off alc, dimethyl sulfate...added to effect desired n-methylation.

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

Frequently asked questions

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

What is Paramethadione?

Paramethadione is an oxazolidinone. It has a role as an anticonvulsant. It is functionally related to a 5-ethyl-5-methyl-1,3-oxazolidine-2,4-dione.

What is the CAS number of Paramethadione?

The CAS registry number of Paramethadione is 115-67-3.

What is the molecular formula and weight of Paramethadione?

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

What is Paramethadione used for?

Veterinary medication:. Therapeutic category: Anticonvulsant.

Is Paramethadione hazardous?

Paramethadione carries the GHS signal word "Danger". Main hazards: causes skin irritation, causes serious eye irritation, may cause respiratory irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Paramethadione?

Paramethadione 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 Paramethadione?

CompoundList lists 3 suppliers of Paramethadione in India. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Paramethadione in India?

3 suppliers in India list Paramethadione on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Paramethadione?

Suppliers quote Paramethadione 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 Paramethadione

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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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