3-Ethyl-4-methyl-1H-pyrrole-2,5-dione

Overview IFRA Botanical Request a quote

  • Identifiers

    CAS number
    20189-42-8

    Molecular formula
    C7H9NO2

    SMILES
    CCC1=C(C(=O)NC1=O)C

  • Odor profile

    Caramellic 56.13%
    Sweet 50.56%
    Burnt 44.18%
    Nutty 29.3%
    Roasted 28.04%
    Mint 26.02%
    Tobacco 24.82%
    Spicy 24.7%
    Coffee 21.46%
    Buttery 19.9%

    Scent© AI

  • Properties

    XLogP3-AA
    0.5

    pKa est.
    9.08 (weak base)

    Molecular weight
    139.15 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Slow

    Boiling point est.
    242°C

    Flash point est.
    135.87 ˚C

  • Synonyms

    • 20189-42-8
    • 3-ethyl-4-methylpyrrole-2,5-dione
    • 3-ETHYL-4-METHYL-1H-PYRROLE-2,5-DIONE
    • 3-ETHYL-4-METHYL-PYRROLE-2,5-DIONE
    • 2-Ethyl-3-methylmaleimide
    • 1H-Pyrrole-2,5-dione, 3-ethyl-4-methyl-
    • Ethylmethylmaleimide
    • Methylethylmaleimide
    • S5G691PF96
    • 3-ethyl-4-methyl-2,5-dihydro-1H-pyrrole-2,5-dione
    • Maleimide, 2-ethyl-3-methyl-
    • UNII-S5G691PF96
    • SCHEMBL6239729
    • DTXSID30174021
    • CHEBI:192721
    • CUBICSJJYOPOIA-UHFFFAOYSA-N
    • BCP06211
    • AKOS015951008
    • 3-Ethyl-4-methyl-2,5-pyrrolidine-dione
    • DB-366468
    • CS-0449303
    • NS00010668
    • Q27288659

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 90.82
    methanol 141.57
    isopropanol 70.75
    water 6.2
    ethyl acetate 50.45
    n-propanol 71.16
    acetone 93.96
    n-butanol 64.85
    acetonitrile 68.34
    DMF 246.03
    toluene 25.31
    isobutanol 49.2
    1,4-dioxane 150.79
    methyl acetate 65.85
    THF 186.94
    2-butanone 75.44
    n-pentanol 54.57
    sec-butanol 59.33
    n-hexane 2.66
    ethylene glycol 39.21
    NMP 215.6
    cyclohexane 1.83
    DMSO 241.66
    n-butyl acetate 34.65
    n-octanol 17.38
    chloroform 152.46
    n-propyl acetate 30.35
    acetic acid 125.32
    dichloromethane 156.6
    cyclohexanone 104.24
    propylene glycol 35.49
    isopropyl acetate 35.68
    DMAc 147.42
    2-ethoxyethanol 99.47
    isopentanol 56.93
    n-heptane 1.47
    ethyl formate 51.03
    1,2-dichloroethane 94.29
    n-hexanol 39.94
    2-methoxyethanol 182.7
    isobutyl acetate 20.6
    tetrachloromethane 19.89
    n-pentyl acetate 31.81
    transcutol 145.64
    n-heptanol 21.93
    ethylbenzene 15.28
    MIBK 43.42
    2-propoxyethanol 96.87
    tert-butanol 78.35
    MTBE 45.61
    2-butoxyethanol 58.81
    propionic acid 70.47
    o-xylene 20.38
    formic acid 99.99
    diethyl ether 47.76
    m-xylene 21.28
    p-xylene 22.41
    chlorobenzene 52.72
    dimethyl carbonate 41.18
    n-octane 0.91
    formamide 158.76
    cyclopentanone 156.51
    2-pentanone 59.44
    anisole 46.71
    cyclopentyl methyl ether 56.58
    gamma-butyrolactone 207.97
    1-methoxy-2-propanol 113.62
    pyridine 105.79
    3-pentanone 43.6
    furfural 183.32
    n-dodecane 0.98
    diethylene glycol 96.48
    diisopropyl ether 12.74
    tert-amyl alcohol 65.59
    acetylacetone 74.89
    n-hexadecane 1.14
    acetophenone 46.77
    methyl propionate 51.46
    isopentyl acetate 35.83
    trichloroethylene 192.38
    n-nonanol 17.46
    cyclohexanol 43.4
    benzyl alcohol 46.9
    2-ethylhexanol 19.46
    isooctanol 18.35
    dipropyl ether 16.57
    1,2-dichlorobenzene 51.42
    ethyl lactate 26.63
    propylene carbonate 86.05
    n-methylformamide 144.51
    2-pentanol 39.01
    n-pentane 2.18
    1-propoxy-2-propanol 51.49
    1-methoxy-2-propyl acetate 50.98
    2-(2-methoxypropoxy) propanol 51.7
    mesitylene 12.59
    ε-caprolactone 88.62
    p-cymene 10.69
    epichlorohydrin 197.88
    1,1,1-trichloroethane 76.69
    2-aminoethanol 64.65
    morpholine-4-carbaldehyde 189.19
    sulfolane 240.7
    2,2,4-trimethylpentane 2.23
    2-methyltetrahydrofuran 103.81
    n-hexyl acetate 43.66
    isooctane 1.74
    2-(2-butoxyethoxy)ethanol 69.56
    sec-butyl acetate 22.67
    tert-butyl acetate 46.58
    decalin 2.86
    glycerin 64.45
    diglyme 116.62
    acrylic acid 78.67
    isopropyl myristate 17.72
    n-butyric acid 76.5
    acetyl acetate 39.89
    di(2-ethylhexyl) phthalate 25.54
    ethyl propionate 30.38
    nitromethane 199.02
    1,2-diethoxyethane 40.3
    benzonitrile 59.45
    trioctyl phosphate 17.17
    1-bromopropane 42.26
    gamma-valerolactone 203.29
    n-decanol 12.77
    triethyl phosphate 21.82
    4-methyl-2-pentanol 25.09
    propionitrile 53.86
    vinylene carbonate 84.68
    1,1,2-trichlorotrifluoroethane 116.16
    DMS 45.17
    cumene 12.16
    2-octanol 15.69
    2-hexanone 42.72
    octyl acetate 23.62
    limonene 13.75
    1,2-dimethoxyethane 133.62
    ethyl orthosilicate 20.49
    tributyl phosphate 20.49
    diacetone alcohol 66.32
    N,N-dimethylaniline 35.23
    acrylonitrile 84.18
    aniline 50.58
    1,3-propanediol 101.52
    bromobenzene 46.05
    dibromomethane 86.02
    1,1,2,2-tetrachloroethane 128.49
    2-methyl-cyclohexyl acetate 30.29
    tetrabutyl urea 27.92
    diisobutyl methanol 13.14
    2-phenylethanol 43.57
    styrene 18.77
    dioctyl adipate 26.74
    dimethyl sulfate 86.75
    ethyl butyrate 25.99
    methyl lactate 45.61
    butyl lactate 30.59
    diethyl carbonate 22.03
    propanediol butyl ether 45.38
    triethyl orthoformate 22.94
    p-tert-butyltoluene 10.99
    methyl 4-tert-butylbenzoate 52.03
    morpholine 152.63
    tert-butylamine 37.8
    n-dodecanol 9.49
    dimethoxymethane 118.81
    ethylene carbonate 63.0
    cyrene 66.05
    2-ethoxyethyl acetate 47.07
    2-ethylhexyl acetate 27.66
    1,2,4-trichlorobenzene 65.4
    4-methylpyridine 97.79
    dibutyl ether 15.05
    2,6-dimethyl-4-heptanol 13.14
    DEF 68.28
    dimethyl isosorbide 91.09
    tetrachloroethylene 82.65
    eugenol 57.02
    triacetin 38.89
    span 80 42.99
    1,4-butanediol 41.89
    1,1-dichloroethane 82.56
    2-methyl-1-pentanol 48.36
    methyl formate 103.35
    2-methyl-1-butanol 52.1
    n-decane 1.52
    butyronitrile 52.79
    3,7-dimethyl-1-octanol 16.97
    1-chlorooctane 9.23
    1-chlorotetradecane 4.26
    n-nonane 1.24
    undecane 1.19
    tert-butylcyclohexane 3.01
    cyclooctane 0.84
    cyclopentanol 66.25
    tetrahydropyran 77.17
    tert-amyl methyl ether 35.06
    2,5,8-trioxanonane 81.35
    1-hexene 13.41
    2-isopropoxyethanol 59.66
    2,2,2-trifluoroethanol 68.3
    methyl butyrate 41.51

    Scent© AI

1 4

IFRA standard 51

Recommendation
No restriction
Maximum acceptable concentrations in the finished product (%)
Category 1
Products applied to the lips
 No restriction Category 7A
Rinse-off products applied to the hair with some hand contact
 No restriction
Category 2
Products applied to the axillae
 No restriction Category 7B
Leave-on products applied to the hair with some hand contact
 No restriction
Category 3
Products applied to the face/body using fingertips
 No restriction Category 8
Products with significant anogenital exposure
 No restriction
Category 4
Products related to fine fragrance
 No restriction Category 9
Products with body and hand exposure, primarily rinse off
 No restriction
Category 5A
Body lotion products applied to the body using the hands (palms), primarily leave on
 No restriction Category 10A
Household care products with mostly hand contact
 No restriction
Category 5B
Face moisturizer products applied to the face using the hands (palms), primarily leave on
 No restriction Category 10B
Household care products with mostly hand contact, including aerosol/spray products (with potential leave-on skin contact)
 No restriction
Category 5C
Hand cream products applied to the hands using the hands (palms), primarily leave on
 No restriction Category 11A
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate without UV exposure
 No restriction
Category 5D
Baby Creams, baby Oils and baby talc
 No restriction Category 11B
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate with potential UV exposure
 No restriction
Category 6
Products with oral and lip exposure
 No restriction Category 12
Products not intended for direct skin contact, minimal or insignificant transfer to skin
 No restriction

Botanical

Name CAS Botanical Proportion
Hedyotis diffusa (Malaysia) Hedyotis diffusa Willd. (syn. Oldenlandia diffusa Roxb.), fam. Rubiaceae 0.3%
Indian curry leaf tree (leaf) Murraya koenigii Spreng., fam. Rutaceae 0.01%