2,5-Dimethyl-3-(2-propenyl)pyrazine

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  • Identifiers

    CAS number
    55138-69-7

    Molecular formula
    C9H12N2

    SMILES
    CC1=CN=C(C(=N1)CC=C)C

    Safety labels

  • Odor profile

    Fragrance
    Roasted 53.79%
    Nutty 51.67%
    Earthy 46.13%
    Burnt 41.17%
    Musty 38.78%
    Hazelnut 38.17%
    Cocoa 34.38%
    Coffee 32.63%
    Popcorn 32.05%
    Potato 31.66%

     

    Flavor
    Nutty 52.8%
    Roasted 48.37%
    Cocoa 39.47%
    Roast 34.62%
    Hazelnut 33.87%
    Meaty 33.46%
    Musty 32.83%
    Potato 31.18%
    Coffee 31.11%
    Popcorn 30.33%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    1.7

    pKa est.
    4.49 (weak acid)

    Molecular weight
    148.2 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Moderately slow

    Boiling point est.
    230°C

    Flash point

    • 80.35 ˚C est.

  • Synonyms

    • 2,5-Dimethyl-3-(2-propenyl)pyrazine
    • 2,5-dimethyl-3-(prop-2-en-1-yl)pyrazine
    • 3-Allyl-2,5-dimethylpyrazine
    • 2,5-dimethyl-3-prop-2-enylpyrazine
    • 3-Allyl-2,5-dimethylpyrazine #
    • CHEBI:193669
    • GHMVLFIPIFJTOS-UHFFFAOYSA-N
    • DTXSID001282316
    • 55138-69-7
    • 2,5-Dimethyl-3-(2-propen-1-yl)pyrazine
    • Pyrazine, 2,5-dimethyl-3-(2-propenyl)-
    • 55138-69-7

  • Applications

    2,5-Dimethyl-3-(2-propenyl)pyrazine (CAS 55138-69-7) is a pyrazine derivative that is considered an odorant and fragrance component for a range of industrial applications; in practice, it may be used as a fragrance ingredient in perfumery and flavor to create characteristic notes; it is also evaluated for cosmetics and personal care applications as a fragrance component; in household products such as fabric softeners, laundry detergents, and cleaners to impart scent; and it may serve as an aroma additive in coatings, inks, and industrial cleaning formulations.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 121.72
    methanol 130.33
    isopropanol 101.84
    water 1.28
    ethyl acetate 113.92
    n-propanol 121.48
    acetone 135.19
    n-butanol 120.73
    acetonitrile 95.51
    DMF 248.22
    toluene 137.51
    isobutanol 116.22
    1,4-dioxane 222.31
    methyl acetate 126.3
    THF 337.44
    2-butanone 158.52
    n-pentanol 105.29
    sec-butanol 123.73
    n-hexane 48.98
    ethylene glycol 40.02
    NMP 289.65
    cyclohexane 77.65
    DMSO 225.17
    n-butyl acetate 168.72
    n-octanol 107.74
    chloroform 533.36
    n-propyl acetate 86.32
    acetic acid 99.39
    dichloromethane 525.34
    cyclohexanone 256.99
    propylene glycol 56.95
    isopropyl acetate 74.83
    DMAc 285.32
    2-ethoxyethanol 110.25
    isopentanol 107.37
    n-heptane 64.29
    ethyl formate 114.66
    1,2-dichloroethane 252.87
    n-hexanol 175.2
    2-methoxyethanol 150.92
    isobutyl acetate 72.89
    tetrachloromethane 128.38
    n-pentyl acetate 107.2
    transcutol 249.2
    n-heptanol 96.73
    ethylbenzene 103.95
    MIBK 85.42
    2-propoxyethanol 176.14
    tert-butanol 123.44
    MTBE 128.67
    2-butoxyethanol 112.86
    propionic acid 112.08
    o-xylene 120.76
    formic acid 34.42
    diethyl ether 120.59
    m-xylene 111.9
    p-xylene 138.08
    chlorobenzene 189.1
    dimethyl carbonate 63.86
    n-octane 30.48
    formamide 39.58
    cyclopentanone 276.69
    2-pentanone 115.83
    anisole 129.01
    cyclopentyl methyl ether 182.73
    gamma-butyrolactone 276.05
    1-methoxy-2-propanol 122.92
    pyridine 210.28
    3-pentanone 124.45
    furfural 280.79
    n-dodecane 28.29
    diethylene glycol 119.51
    diisopropyl ether 54.26
    tert-amyl alcohol 133.1
    acetylacetone 117.91
    n-hexadecane 31.21
    acetophenone 127.36
    methyl propionate 117.67
    isopentyl acetate 139.22
    trichloroethylene 438.15
    n-nonanol 91.59
    cyclohexanol 137.9
    benzyl alcohol 109.51
    2-ethylhexanol 137.15
    isooctanol 79.28
    dipropyl ether 140.15
    1,2-dichlorobenzene 192.09
    ethyl lactate 67.76
    propylene carbonate 193.23
    n-methylformamide 97.67
    2-pentanol 87.29
    n-pentane 47.0
    1-propoxy-2-propanol 142.08
    1-methoxy-2-propyl acetate 129.67
    2-(2-methoxypropoxy) propanol 126.18
    mesitylene 80.13
    ε-caprolactone 205.97
    p-cymene 105.47
    epichlorohydrin 287.14
    1,1,1-trichloroethane 263.07
    2-aminoethanol 69.41
    morpholine-4-carbaldehyde 231.9
    sulfolane 349.39
    2,2,4-trimethylpentane 34.72
    2-methyltetrahydrofuran 262.21
    n-hexyl acetate 147.45
    isooctane 21.94
    2-(2-butoxyethoxy)ethanol 139.68
    sec-butyl acetate 67.69
    tert-butyl acetate 86.41
    decalin 50.16
    glycerin 67.48
    diglyme 225.76
    acrylic acid 97.24
    isopropyl myristate 79.93
    n-butyric acid 138.93
    acetyl acetate 81.82
    di(2-ethylhexyl) phthalate 89.58
    ethyl propionate 88.98
    nitromethane 122.92
    1,2-diethoxyethane 137.26
    benzonitrile 157.34
    trioctyl phosphate 68.65
    1-bromopropane 198.57
    gamma-valerolactone 254.89
    n-decanol 77.62
    triethyl phosphate 81.26
    4-methyl-2-pentanol 60.38
    propionitrile 117.27
    vinylene carbonate 197.87
    1,1,2-trichlorotrifluoroethane 190.39
    DMS 117.82
    cumene 87.5
    2-octanol 78.07
    2-hexanone 107.86
    octyl acetate 100.26
    limonene 138.33
    1,2-dimethoxyethane 195.18
    ethyl orthosilicate 78.24
    tributyl phosphate 78.19
    diacetone alcohol 96.78
    N,N-dimethylaniline 123.41
    acrylonitrile 123.0
    aniline 125.55
    1,3-propanediol 87.39
    bromobenzene 225.14
    dibromomethane 370.21
    1,1,2,2-tetrachloroethane 358.06
    2-methyl-cyclohexyl acetate 123.32
    tetrabutyl urea 101.04
    diisobutyl methanol 75.43
    2-phenylethanol 143.82
    styrene 113.79
    dioctyl adipate 109.94
    dimethyl sulfate 108.22
    ethyl butyrate 125.7
    methyl lactate 73.46
    butyl lactate 92.28
    diethyl carbonate 97.33
    propanediol butyl ether 113.18
    triethyl orthoformate 94.64
    p-tert-butyltoluene 92.31
    methyl 4-tert-butylbenzoate 130.95
    morpholine 201.99
    tert-butylamine 100.24
    n-dodecanol 68.28
    dimethoxymethane 155.94
    ethylene carbonate 155.75
    cyrene 130.56
    2-ethoxyethyl acetate 119.0
    2-ethylhexyl acetate 129.13
    1,2,4-trichlorobenzene 216.18
    4-methylpyridine 223.65
    dibutyl ether 125.22
    2,6-dimethyl-4-heptanol 75.43
    DEF 163.62
    dimethyl isosorbide 208.07
    tetrachloroethylene 252.95
    eugenol 125.48
    triacetin 120.99
    span 80 124.65
    1,4-butanediol 57.44
    1,1-dichloroethane 251.0
    2-methyl-1-pentanol 114.01
    methyl formate 96.0
    2-methyl-1-butanol 123.21
    n-decane 40.39
    butyronitrile 133.01
    3,7-dimethyl-1-octanol 101.48
    1-chlorooctane 104.91
    1-chlorotetradecane 54.72
    n-nonane 40.71
    undecane 32.92
    tert-butylcyclohexane 48.81
    cyclooctane 32.77
    cyclopentanol 159.88
    tetrahydropyran 230.75
    tert-amyl methyl ether 125.77
    2,5,8-trioxanonane 180.48
    1-hexene 105.78
    2-isopropoxyethanol 89.33
    2,2,2-trifluoroethanol 49.67
    methyl butyrate 117.45

    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