2-Ethenyl-3-ethyl-5-methylpyrazine

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  • Identifiers

    CAS number
    181589-32-2

    Molecular formula
    C9H12N2

    SMILES
    CCC1=NC(=CN=C1C=C)C

  • Odor profile

    Nutty 56.62%
    Roasted 54.29%
    Earthy 51.69%
    Burnt 41.9%
    Musty 41.21%
    Hazelnut 41.04%
    Potato 39.58%
    Popcorn 38.95%
    Cocoa 37.94%
    Coffee 35.92%

    Scent© AI

  • Properties

    XLogP3-AA
    1.9

    pKa est.
    4.86 (weak acid)

    Molecular weight
    148.2 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Moderate

    Boiling point

    • 202.00 to 203.00 °C. @ 760.00 mm Hg

    Flash point est.
    76.41 ˚C

  • Synonyms

    • 2-ethenyl-3-ethyl-5-methylpyrazine
    • 181589-32-2
    • 3-Ethyl-5-methyl-2-vinylpyrazine
    • DTXSID70424032
    • 2-Ethenyl-3-ethyl-5-methylpyrazine, 9CI
    • ethenyl-ethylmethylpyrazine,2-ethenyl-3-ethyl-5-methylpyrazine
    • 3-Ethyl-5-methyl-2-ethenylpyrazine
    • 2-Ethenyl-3-ethyl-5-methyl-pyrazine
    • starbld0006349
    • ethenyl ethyl methyl pyrazine
    • SCHEMBL1312618
    • DTXCID60374870
    • CHEBI:186753
    • AKOS006326920
    • DB-313955
    • 2-Ethenyl-3-ethyl-5-methylpyrazine (Stabilized with ~1% Hydroquinone)

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 230.78
    methanol 249.89
    isopropanol 176.77
    water 0.8
    ethyl acetate 387.11
    n-propanol 222.22
    acetone 500.06
    n-butanol 213.66
    acetonitrile 311.17
    DMF 619.23
    toluene 342.14
    isobutanol 190.37
    1,4-dioxane 578.28
    methyl acetate 375.14
    THF 897.53
    2-butanone 442.38
    n-pentanol 210.17
    sec-butanol 217.05
    n-hexane 130.56
    ethylene glycol 58.39
    NMP 682.83
    cyclohexane 187.74
    DMSO 509.39
    n-butyl acetate 572.1
    n-octanol 216.82
    chloroform 1331.62
    n-propyl acetate 311.41
    acetic acid 240.23
    dichloromethane 1525.44
    cyclohexanone 676.55
    propylene glycol 71.23
    isopropyl acetate 240.22
    DMAc 521.31
    2-ethoxyethanol 248.45
    isopentanol 194.78
    n-heptane 155.94
    ethyl formate 337.64
    1,2-dichloroethane 850.41
    n-hexanol 327.46
    2-methoxyethanol 313.14
    isobutyl acetate 221.41
    tetrachloromethane 358.24
    n-pentyl acetate 308.75
    transcutol 519.48
    n-heptanol 186.9
    ethylbenzene 252.97
    MIBK 234.34
    2-propoxyethanol 360.79
    tert-butanol 209.67
    MTBE 288.5
    2-butoxyethanol 226.86
    propionic acid 235.59
    o-xylene 273.82
    formic acid 68.26
    diethyl ether 366.73
    m-xylene 294.6
    p-xylene 345.0
    chlorobenzene 522.77
    dimethyl carbonate 200.95
    n-octane 82.06
    formamide 98.98
    cyclopentanone 790.83
    2-pentanone 368.7
    anisole 323.48
    cyclopentyl methyl ether 483.07
    gamma-butyrolactone 838.7
    1-methoxy-2-propanol 239.36
    pyridine 599.58
    3-pentanone 352.53
    furfural 707.05
    n-dodecane 67.09
    diethylene glycol 201.01
    diisopropyl ether 149.33
    tert-amyl alcohol 227.82
    acetylacetone 392.04
    n-hexadecane 76.29
    acetophenone 321.19
    methyl propionate 346.94
    isopentyl acetate 418.54
    trichloroethylene 1390.56
    n-nonanol 184.18
    cyclohexanol 259.19
    benzyl alcohol 234.88
    2-ethylhexanol 265.96
    isooctanol 155.93
    dipropyl ether 377.37
    1,2-dichlorobenzene 515.98
    ethyl lactate 147.34
    propylene carbonate 533.75
    n-methylformamide 269.13
    2-pentanol 168.4
    n-pentane 113.52
    1-propoxy-2-propanol 290.79
    1-methoxy-2-propyl acetate 344.98
    2-(2-methoxypropoxy) propanol 228.56
    mesitylene 221.96
    ε-caprolactone 557.63
    p-cymene 248.08
    epichlorohydrin 853.5
    1,1,1-trichloroethane 845.3
    2-aminoethanol 100.33
    morpholine-4-carbaldehyde 570.61
    sulfolane 937.15
    2,2,4-trimethylpentane 74.91
    2-methyltetrahydrofuran 648.52
    n-hexyl acetate 407.39
    isooctane 54.5
    2-(2-butoxyethoxy)ethanol 270.98
    sec-butyl acetate 204.23
    tert-butyl acetate 247.13
    decalin 127.88
    glycerin 91.7
    diglyme 510.84
    acrylic acid 212.09
    isopropyl myristate 196.56
    n-butyric acid 307.36
    acetyl acetate 260.95
    di(2-ethylhexyl) phthalate 179.63
    ethyl propionate 297.69
    nitromethane 430.09
    1,2-diethoxyethane 393.39
    benzonitrile 423.14
    trioctyl phosphate 149.2
    1-bromopropane 545.34
    gamma-valerolactone 747.08
    n-decanol 155.6
    triethyl phosphate 201.53
    4-methyl-2-pentanol 113.85
    propionitrile 302.17
    vinylene carbonate 534.99
    1,1,2-trichlorotrifluoroethane 417.75
    DMS 322.69
    cumene 204.93
    2-octanol 162.95
    2-hexanone 330.8
    octyl acetate 243.54
    limonene 313.74
    1,2-dimethoxyethane 493.8
    ethyl orthosilicate 187.95
    tributyl phosphate 184.71
    diacetone alcohol 211.04
    N,N-dimethylaniline 267.87
    acrylonitrile 353.91
    aniline 268.93
    1,3-propanediol 153.12
    bromobenzene 690.51
    dibromomethane 1041.36
    1,1,2,2-tetrachloroethane 1004.48
    2-methyl-cyclohexyl acetate 296.01
    tetrabutyl urea 228.84
    diisobutyl methanol 155.77
    2-phenylethanol 304.01
    styrene 297.68
    dioctyl adipate 257.27
    dimethyl sulfate 299.33
    ethyl butyrate 403.79
    methyl lactate 145.6
    butyl lactate 199.03
    diethyl carbonate 289.13
    propanediol butyl ether 195.96
    triethyl orthoformate 257.22
    p-tert-butyltoluene 218.41
    methyl 4-tert-butylbenzoate 271.63
    morpholine 506.77
    tert-butylamine 168.36
    n-dodecanol 134.14
    dimethoxymethane 434.01
    ethylene carbonate 438.67
    cyrene 232.8
    2-ethoxyethyl acetate 324.39
    2-ethylhexyl acetate 373.54
    1,2,4-trichlorobenzene 548.23
    4-methylpyridine 599.59
    dibutyl ether 350.56
    2,6-dimethyl-4-heptanol 155.77
    DEF 437.93
    dimethyl isosorbide 441.76
    tetrachloroethylene 730.57
    eugenol 259.79
    triacetin 301.36
    span 80 222.96
    1,4-butanediol 101.25
    1,1-dichloroethane 770.39
    2-methyl-1-pentanol 207.37
    methyl formate 300.96
    2-methyl-1-butanol 204.97
    n-decane 99.67
    butyronitrile 353.07
    3,7-dimethyl-1-octanol 203.29
    1-chlorooctane 265.16
    1-chlorotetradecane 129.96
    n-nonane 105.52
    undecane 79.91
    tert-butylcyclohexane 113.97
    cyclooctane 90.79
    cyclopentanol 298.65
    tetrahydropyran 603.12
    tert-amyl methyl ether 259.94
    2,5,8-trioxanonane 364.91
    1-hexene 268.74
    2-isopropoxyethanol 191.61
    2,2,2-trifluoroethanol 101.13
    methyl butyrate 386.37

    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