2,3-Dimethyl-5-(1-propen-1-yl)pyrazine

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  • Identifiers

    CAS number
    80033-12-1

    Molecular formula
    C9H12N2

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

    Safety labels

  • Odor profile

    Fragrance
    Nutty 63.75%
    Roasted 62.39%
    Earthy 50.52%
    Musty 44.44%
    Hazelnut 44.36%
    Burnt 42.84%
    Cocoa 42.08%
    Coffee 37.8%
    Chocolate 37.44%
    Green 37.09%

     

    Flavor
    Nutty 57.75%
    Cocoa 46.28%
    Roasted 42.95%
    Hazelnut 36.09%
    Musty 33.5%
    Coffee 31.87%
    Chocolate 29.17%
    Roast 28.62%
    Potato 28.35%
    Earthy 27.92%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    1.6

    pKa est.
    4.58 (weak acid)

    Molecular weight
    148.2 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Slow

    Boiling point est.
    258°C

    Flash point

    • 93.22 ˚C est.

  • Synonyms

    • 2,3-Dimethyl-5-(1-propen-1-yl)pyrazine
    • 80033-12-1
    • RefChem:245035
    • 2,3-dimethyl-5-propenylpyrazine
    • DTXSID601284415
    • 2,3-Dimethyl-5-(prop-1-en-1-yl)pyrazine
    • 80033-12-1

  • Applications

    2,3-Dimethyl-5-(1-propen-1-yl)pyrazine (CAS 80033-12-1) is used as a specialty odorant in perfumery and as a flavor/aroma component in flavor formulations; it is also employed in cosmetics/personal care and household products for its distinctive pyrazine notes. The allyl substituent enables functionalization, making it suitable as a reactive monomer or crosslinking agent in polymers and coatings/inks, and it can serve as a chemical intermediate in organic synthesis for specialty materials.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 165.29
    methanol 198.47
    isopropanol 129.02
    water 1.59
    ethyl acetate 127.68
    n-propanol 161.65
    acetone 129.45
    n-butanol 164.24
    acetonitrile 119.87
    DMF 252.27
    toluene 188.31
    isobutanol 140.85
    1,4-dioxane 276.9
    methyl acetate 131.64
    THF 355.59
    2-butanone 159.25
    n-pentanol 132.59
    sec-butanol 154.55
    n-hexane 86.72
    ethylene glycol 32.95
    NMP 316.52
    cyclohexane 139.05
    DMSO 182.77
    n-butyl acetate 164.73
    n-octanol 97.72
    chloroform 880.93
    n-propyl acetate 94.08
    acetic acid 155.06
    dichloromethane 697.39
    cyclohexanone 281.6
    propylene glycol 46.93
    isopropyl acetate 80.9
    DMAc 297.81
    2-ethoxyethanol 119.88
    isopentanol 142.3
    n-heptane 64.01
    ethyl formate 127.23
    1,2-dichloroethane 325.5
    n-hexanol 173.94
    2-methoxyethanol 171.12
    isobutyl acetate 73.32
    tetrachloromethane 216.58
    n-pentyl acetate 108.78
    transcutol 283.64
    n-heptanol 99.54
    ethylbenzene 116.04
    MIBK 82.94
    2-propoxyethanol 167.63
    tert-butanol 148.75
    MTBE 148.65
    2-butoxyethanol 120.13
    propionic acid 122.05
    o-xylene 131.2
    formic acid 55.54
    diethyl ether 164.4
    m-xylene 117.91
    p-xylene 157.11
    chlorobenzene 240.92
    dimethyl carbonate 68.87
    n-octane 28.77
    formamide 67.35
    cyclopentanone 278.33
    2-pentanone 118.28
    anisole 141.63
    cyclopentyl methyl ether 189.14
    gamma-butyrolactone 284.99
    1-methoxy-2-propanol 126.85
    pyridine 314.99
    3-pentanone 133.18
    furfural 290.3
    n-dodecane 22.44
    diethylene glycol 104.42
    diisopropyl ether 58.36
    tert-amyl alcohol 166.56
    acetylacetone 108.66
    n-hexadecane 25.34
    acetophenone 126.94
    methyl propionate 117.23
    isopentyl acetate 144.82
    trichloroethylene 608.33
    n-nonanol 86.95
    cyclohexanol 172.28
    benzyl alcohol 124.85
    2-ethylhexanol 127.27
    isooctanol 77.75
    dipropyl ether 132.1
    1,2-dichlorobenzene 228.46
    ethyl lactate 63.17
    propylene carbonate 198.1
    n-methylformamide 113.11
    2-pentanol 116.06
    n-pentane 72.5
    1-propoxy-2-propanol 135.36
    1-methoxy-2-propyl acetate 115.31
    2-(2-methoxypropoxy) propanol 112.79
    mesitylene 79.93
    ε-caprolactone 220.49
    p-cymene 89.73
    epichlorohydrin 314.92
    1,1,1-trichloroethane 368.02
    2-aminoethanol 69.5
    morpholine-4-carbaldehyde 240.04
    sulfolane 320.86
    2,2,4-trimethylpentane 40.51
    2-methyltetrahydrofuran 279.51
    n-hexyl acetate 148.7
    isooctane 22.26
    2-(2-butoxyethoxy)ethanol 133.84
    sec-butyl acetate 71.61
    tert-butyl acetate 86.25
    decalin 56.44
    glycerin 56.45
    diglyme 216.15
    acrylic acid 111.36
    isopropyl myristate 69.65
    n-butyric acid 171.83
    acetyl acetate 97.08
    di(2-ethylhexyl) phthalate 80.02
    ethyl propionate 91.89
    nitromethane 156.45
    1,2-diethoxyethane 150.31
    benzonitrile 180.82
    trioctyl phosphate 54.95
    1-bromopropane 265.82
    gamma-valerolactone 267.94
    n-decanol 69.58
    triethyl phosphate 80.68
    4-methyl-2-pentanol 68.35
    propionitrile 146.5
    vinylene carbonate 204.5
    1,1,2-trichlorotrifluoroethane 230.91
    DMS 109.17
    cumene 88.58
    2-octanol 74.66
    2-hexanone 111.87
    octyl acetate 89.46
    limonene 122.38
    1,2-dimethoxyethane 211.36
    ethyl orthosilicate 82.72
    tributyl phosphate 66.88
    diacetone alcohol 90.75
    N,N-dimethylaniline 125.06
    acrylonitrile 149.26
    aniline 176.33
    1,3-propanediol 101.1
    bromobenzene 286.41
    dibromomethane 522.03
    1,1,2,2-tetrachloroethane 533.58
    2-methyl-cyclohexyl acetate 121.2
    tetrabutyl urea 83.61
    diisobutyl methanol 70.28
    2-phenylethanol 143.91
    styrene 140.25
    dioctyl adipate 94.65
    dimethyl sulfate 106.45
    ethyl butyrate 117.54
    methyl lactate 67.25
    butyl lactate 82.77
    diethyl carbonate 97.9
    propanediol butyl ether 93.5
    triethyl orthoformate 101.01
    p-tert-butyltoluene 82.41
    methyl 4-tert-butylbenzoate 119.17
    morpholine 266.2
    tert-butylamine 126.06
    n-dodecanol 57.1
    dimethoxymethane 146.4
    ethylene carbonate 163.36
    cyrene 117.81
    2-ethoxyethyl acetate 115.56
    2-ethylhexyl acetate 134.29
    1,2,4-trichlorobenzene 253.75
    4-methylpyridine 290.98
    dibutyl ether 126.84
    2,6-dimethyl-4-heptanol 70.28
    DEF 172.85
    dimethyl isosorbide 197.93
    tetrachloroethylene 382.08
    eugenol 123.34
    triacetin 111.33
    span 80 110.23
    1,4-butanediol 52.06
    1,1-dichloroethane 334.06
    2-methyl-1-pentanol 135.41
    methyl formate 99.54
    2-methyl-1-butanol 163.14
    n-decane 34.71
    butyronitrile 173.18
    3,7-dimethyl-1-octanol 94.52
    1-chlorooctane 99.32
    1-chlorotetradecane 45.4
    n-nonane 36.21
    undecane 26.79
    tert-butylcyclohexane 49.77
    cyclooctane 48.5
    cyclopentanol 179.66
    tetrahydropyran 295.08
    tert-amyl methyl ether 138.5
    2,5,8-trioxanonane 169.95
    1-hexene 159.35
    2-isopropoxyethanol 92.2
    2,2,2-trifluoroethanol 66.95
    methyl butyrate 124.12

    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