2-Methyl-3-(2-propen-1-yl)pyrazine

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  • Identifiers

    CAS number
    55138-62-0

    Molecular formula
    C8H10N2

    SMILES
    CC1=NC=CN=C1CC=C

    Safety labels

  • Odor profile

    Fragrance
    Nutty 60.79%
    Roasted 53.39%
    Green 48.04%
    Earthy 44.7%
    Musty 42.04%
    Burnt 39.18%
    Cocoa 37.88%
    Hazelnut 35.57%
    Popcorn 34.9%
    Potato 33.15%

     

    Flavor
    Nutty 63.0%
    Roasted 45.98%
    Cocoa 37.19%
    Hazelnut 35.73%
    Roast 35.39%
    Musty 34.87%
    Popcorn 33.36%
    Coffee 30.75%
    Vegetable 30.51%
    Potato 29.39%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    1.3

    pKa est.
    4.33 (weak acid)

    Molecular weight
    134.18 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Moderate

    Boiling point est.
    219°C

    Flash point

    • 78.27 ˚C est.

  • Synonyms

    • 55138-62-0
    • RefChem:1063700
    • 2-Methyl-3-(2-propen-1-yl)pyrazine
    • 2-Methyl-3-(2-propenyl)pyrazine
    • 2-methyl-3-prop-2-enylpyrazine
    • 2-Allyl-3-methylpyrazine
    • 2-methyl-3-(prop-2-en-1-yl)pyrazine
    • Pyrazine, 2-methyl-3-(2-propenyl)-
    • 155150-19-9
    • 2-Allyl-3-methylpyrazine #
    • SCHEMBL28323729
    • DTXSID80342692
    • AQCVFCFCPBWGSY-UHFFFAOYSA-N
    • CHEBI:179428
    • 55138-62-0

  • Applications

    2-Methyl-3-(2-propen-1-yl)pyrazine (CAS 55138-62-0) is a heterocyclic aroma compound primarily used as an odorant in perfumery and as a flavor-building block for savory profiles; it is commonly evaluated for use in fragrance formulations and flavor chemistry to contribute nutty, roasted, and green pyrazine notes. The allyl group provides potential as a reactive monomer or intermediate in polymeric systems, enabling crosslinking or functionalization in coatings, inks, or specialty polymers. It may also serve as a synthesis intermediate in pharmaceutical- or agrochemical-related research, and as a fragrance ingredient in cosmetics and household products, subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 97.2
    methanol 113.4
    isopropanol 74.32
    water 2.19
    ethyl acetate 86.77
    n-propanol 93.4
    acetone 98.72
    n-butanol 85.31
    acetonitrile 104.63
    DMF 227.68
    toluene 110.86
    isobutanol 86.5
    1,4-dioxane 176.2
    methyl acetate 95.25
    THF 214.88
    2-butanone 118.71
    n-pentanol 73.79
    sec-butanol 81.63
    n-hexane 23.12
    ethylene glycol 39.77
    NMP 257.79
    cyclohexane 47.18
    DMSO 258.9
    n-butyl acetate 110.93
    n-octanol 63.54
    chloroform 430.5
    n-propyl acetate 60.02
    acetic acid 101.77
    dichloromethane 482.78
    cyclohexanone 199.35
    propylene glycol 43.44
    isopropyl acetate 50.68
    DMAc 241.86
    2-ethoxyethanol 88.77
    isopentanol 73.6
    n-heptane 39.45
    ethyl formate 100.69
    1,2-dichloroethane 229.27
    n-hexanol 114.4
    2-methoxyethanol 127.46
    isobutyl acetate 48.08
    tetrachloromethane 117.63
    n-pentyl acetate 68.59
    transcutol 225.67
    n-heptanol 60.62
    ethylbenzene 65.42
    MIBK 53.78
    2-propoxyethanol 128.61
    tert-butanol 89.59
    MTBE 77.75
    2-butoxyethanol 81.83
    propionic acid 99.49
    o-xylene 90.74
    formic acid 39.36
    diethyl ether 81.59
    m-xylene 80.14
    p-xylene 88.17
    chlorobenzene 166.4
    dimethyl carbonate 45.88
    n-octane 17.34
    formamide 49.41
    cyclopentanone 202.7
    2-pentanone 78.78
    anisole 92.1
    cyclopentyl methyl ether 121.82
    gamma-butyrolactone 229.86
    1-methoxy-2-propanol 93.25
    pyridine 193.92
    3-pentanone 90.74
    furfural 244.2
    n-dodecane 14.97
    diethylene glycol 99.76
    diisopropyl ether 32.76
    tert-amyl alcohol 91.61
    acetylacetone 84.34
    n-hexadecane 16.66
    acetophenone 93.64
    methyl propionate 91.15
    isopentyl acetate 91.76
    trichloroethylene 397.57
    n-nonanol 55.77
    cyclohexanol 99.78
    benzyl alcohol 82.0
    2-ethylhexanol 86.48
    isooctanol 49.58
    dipropyl ether 95.79
    1,2-dichlorobenzene 159.77
    ethyl lactate 49.38
    propylene carbonate 152.62
    n-methylformamide 104.28
    2-pentanol 55.64
    n-pentane 25.57
    1-propoxy-2-propanol 101.15
    1-methoxy-2-propyl acetate 86.22
    2-(2-methoxypropoxy) propanol 89.56
    mesitylene 55.4
    ε-caprolactone 154.48
    p-cymene 68.95
    epichlorohydrin 241.95
    1,1,1-trichloroethane 233.77
    2-aminoethanol 61.51
    morpholine-4-carbaldehyde 203.05
    sulfolane 317.06
    2,2,4-trimethylpentane 19.21
    2-methyltetrahydrofuran 177.28
    n-hexyl acetate 92.36
    isooctane 12.05
    2-(2-butoxyethoxy)ethanol 103.65
    sec-butyl acetate 42.09
    tert-butyl acetate 55.28
    decalin 30.14
    glycerin 59.96
    diglyme 186.47
    acrylic acid 92.36
    isopropyl myristate 48.97
    n-butyric acid 116.49
    acetyl acetate 60.59
    di(2-ethylhexyl) phthalate 59.42
    ethyl propionate 63.22
    nitromethane 127.26
    1,2-diethoxyethane 101.75
    benzonitrile 134.31
    trioctyl phosphate 44.47
    1-bromopropane 154.99
    gamma-valerolactone 204.19
    n-decanol 47.22
    triethyl phosphate 59.26
    4-methyl-2-pentanol 37.65
    propionitrile 112.9
    vinylene carbonate 155.93
    1,1,2-trichlorotrifluoroethane 168.12
    DMS 77.79
    cumene 56.66
    2-octanol 44.56
    2-hexanone 72.0
    octyl acetate 61.59
    limonene 92.87
    1,2-dimethoxyethane 157.53
    ethyl orthosilicate 56.82
    tributyl phosphate 52.0
    diacetone alcohol 69.07
    N,N-dimethylaniline 85.29
    acrylonitrile 129.56
    aniline 110.36
    1,3-propanediol 72.55
    bromobenzene 197.12
    dibromomethane 326.08
    1,1,2,2-tetrachloroethane 310.27
    2-methyl-cyclohexyl acetate 82.91
    tetrabutyl urea 69.89
    diisobutyl methanol 49.69
    2-phenylethanol 100.81
    styrene 76.65
    dioctyl adipate 69.28
    dimethyl sulfate 89.55
    ethyl butyrate 96.46
    methyl lactate 58.08
    butyl lactate 62.09
    diethyl carbonate 72.64
    propanediol butyl ether 73.46
    triethyl orthoformate 71.14
    p-tert-butyltoluene 60.39
    methyl 4-tert-butylbenzoate 93.52
    morpholine 166.35
    tert-butylamine 70.97
    n-dodecanol 41.43
    dimethoxymethane 117.55
    ethylene carbonate 122.99
    cyrene 96.39
    2-ethoxyethyl acetate 80.99
    2-ethylhexyl acetate 81.42
    1,2,4-trichlorobenzene 175.48
    4-methylpyridine 184.86
    dibutyl ether 79.41
    2,6-dimethyl-4-heptanol 49.69
    DEF 132.08
    dimethyl isosorbide 157.43
    tetrachloroethylene 227.96
    eugenol 91.42
    triacetin 80.36
    span 80 84.99
    1,4-butanediol 45.37
    1,1-dichloroethane 218.49
    2-methyl-1-pentanol 74.56
    methyl formate 94.46
    2-methyl-1-butanol 82.82
    n-decane 21.16
    butyronitrile 115.87
    3,7-dimethyl-1-octanol 61.47
    1-chlorooctane 62.81
    1-chlorotetradecane 32.46
    n-nonane 21.29
    undecane 17.42
    tert-butylcyclohexane 26.88
    cyclooctane 19.06
    cyclopentanol 125.51
    tetrahydropyran 156.53
    tert-amyl methyl ether 71.93
    2,5,8-trioxanonane 150.09
    1-hexene 57.91
    2-isopropoxyethanol 67.62
    2,2,2-trifluoroethanol 51.08
    methyl butyrate 86.31

    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