Cas no 20189-42-8 (3-Ethyl-4-methylpyrrole-2,5-dione)

3-Ethyl-4-methylpyrrole-2,5-dione is a heterocyclic organic compound belonging to the pyrrole-dione class, characterized by its diketone functional groups at the 2 and 5 positions. This compound is of interest in synthetic organic chemistry due to its utility as a versatile intermediate in the preparation of pharmaceuticals, agrochemicals, and functional materials. Its structural features, including the ethyl and methyl substituents, influence its reactivity and solubility, making it suitable for selective modifications. The compound’s stability under standard conditions and compatibility with various reaction conditions further enhance its applicability in multi-step synthesis. It is commonly employed in research settings for the development of novel heterocyclic frameworks.
3-Ethyl-4-methylpyrrole-2,5-dione structure
20189-42-8 structure
Product Name:3-Ethyl-4-methylpyrrole-2,5-dione
CAS No:20189-42-8
MF:C7H9NO2
MW:139.151861906052
MDL:MFCD20727838
CID:257538
PubChem ID:29995
Update Time:2025-06-07

3-Ethyl-4-methylpyrrole-2,5-dione Chemical and Physical Properties

Names and Identifiers

    • 3-Ethyl-4-methylpyrrole-2,5-dione
    • 1H-Pyrrole-2,5-dione,3-ethyl-4-methyl-
    • 3-ethyl-4-methyl-pyrrole-2,5-dione
    • 1H-Pyrrole-2,5-dione
    • 2-ethyl-3-methylmaleimide
    • 2-ethyl-3-methylMi
    • 3-methyl-4-ethyl-1H-pyrrole-2,5-dione
    • ethyl methyl maleimide
    • Maleimide,2-ethyl-3-methyl
    • Methylethylmaleimide
    • Ethylmethylmaleimide
    • CUBICSJJYOPOIA-UHFFFAOYSA-N
    • 3-ethyl-4-methyl-2,5-dihydro-1H-pyrrole-2,5-dione
    • DTXSID30174021
    • CHEBI:192721
    • 3-ethyl-4-methylpyrrole-2, 5-dione
    • S5G691PF96
    • CS-0449303
    • 3-Ethyl-4-methyl-2,5-pyrrolidine-dione
    • Maleimide, 2-ethyl-3-methyl-
    • 1H-Pyrrole-2,5-dione, 3-ethyl-4-methyl-
    • AKOS015951008
    • SCHEMBL6239729
    • NS00010668
    • UNII-S5G691PF96
    • Q27288659
    • BCP06211
    • 20189-42-8
    • 3-ETHYL-4-METHYL-1H-PYRROLE-2,5-DIONE
    • DB-366468
    • MDL： MFCD20727838
    • Inchi： 1S/C7H9NO2/c1-3-5-4(2)6(9)8-7(5)10/h3H2,1-2H3,(H,8,9,10)
    • InChI Key： CUBICSJJYOPOIA-UHFFFAOYSA-N
    • SMILES： O=C1C(CC)=C(C)C(N1)=O

Computed Properties

  • Exact Mass: 139.06300
  • Monoisotopic Mass: 139.063
  • Isotope Atom Count: 0
  • Hydrogen Bond Donor Count: 1
  • Hydrogen Bond Acceptor Count: 3
  • Heavy Atom Count: 10
  • Rotatable Bond Count: 1
  • Complexity: 228
  • Covalently-Bonded Unit Count: 1
  • Defined Atom Stereocenter Count: 0
  • Undefined Atom Stereocenter Count : 0
  • Defined Bond Stereocenter Count: 0
  • Undefined Bond Stereocenter Count: 0
  • Surface Charge: 0
  • Tautomer Count: 21
  • XLogP3: 0.5
  • Topological Polar Surface Area: 46.2A^2

Experimental Properties

  • Density: 1.116
  • Melting Point: 67-68 oC
  • Boiling Point: 253 oC
  • Flash Point: 119 oC
  • Refractive Index: 1.484
  • PSA: 46.17000
  • LogP: 0.69810

3-Ethyl-4-methylpyrrole-2,5-dione Security Information

3-Ethyl-4-methylpyrrole-2,5-dione Customs Data

  • HS CODE：2925190090
  • Customs Data：

    China Customs Code:

    2925190090

    Overview:

    2925190090 Other imides and their derivative salts. VAT:17.0% Tax refund rate:9.0% Regulatory conditions:nothing MFN tariff:6.5% general tariff:30.0%

    Declaration elements:

    Product Name, component content, use to

    Summary:

    2925190090 other imides and their derivatives; salts thereof VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0%

3-Ethyl-4-methylpyrrole-2,5-dione Pricemore >>

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