2-Ethyl-5-methoxypyrazine

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  • Identifiers

    CAS number
    68039-50-9

    Molecular formula
    C7H10N2O

    SMILES
    CCC1=CN=C(C=N1)OC

  • Odor profile

    Fragrance
    Nutty 79.92%
    Green 73.73%
    Earthy 71.16%
    Roasted 64.72%
    Potato 52.86%
    Musty 52.71%
    Vegetable 50.52%
    Cocoa 49.96%
    Hazelnut 49.08%
    Chocolate 38.03%

     

    Flavor
    Nutty 58.39%
    Sweet 51.93%
    Earthy 45.76%
    Potato 42.56%
    Musty 39.41%
    Roasted 38.09%
    Coffee 36.6%
    Caramel 35.05%
    Cocoa 34.42%
    Peanut 32.74%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    0.9

    pKa est.
    4.72 (weak acid)

    Molecular weight
    138.17 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Moderate

    Boiling point est.
    209°C

    Flash point

    • 98.29 ˚C est.

  • Synonyms

    • 2-Ethyl-5-methoxypyrazine
    • 68039-50-9
    • Pyrazine, 2-ethyl-5-methoxy-
    • SAM61DOI2G
    • 68739-00-4
    • Pyrazine, 2-ethyl-5(or 6)-methoxy-
    • DTXSID00867711
    • EINECS 272-125-0
    • FEMA NO. 3280, 2-ETHYL-5-METHOXY-
    • 2-Ethyl-(or methyl)-(3,5 or 6)-methoxypyrazine
    • 2-Ethyl-5(or6)-methoxypyrazine
    • UNII-SAM61DOI2G
    • FEMA No. 3280
    • 2-Ethyl-5(or 6)-methoxypyrazine
    • SCHEMBL3504139
    • DTXCID60815879
    • WPGWHDYIRYZAHO-UHFFFAOYSA-N
    • NS00126402
    • Q27289110

  • Applications

    2-Ethyl-5-methoxypyrazine (CAS 68039-50-9) is a potent odorant used primarily as a fragrance ingredient and flavor additive to impart green, bell pepper-like notes. In perfumery and cosmetics, it is employed to deliver fresh, herbaceous character and to enhance leafy or vegetal accords in formulations. In the flavor industry, it is used to reproduce bell pepper and green herbaceous nuances in foods and beverages at very low concentrations due to its high potency. It may also serve as an intermediate in the synthesis of other pyrazine aroma compounds and can appear in household products as a fragrance component under appropriate regulatory controls. Its use is subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 121.91
    methanol 186.58
    isopropanol 62.32
    water 2.42
    ethyl acetate 134.13
    n-propanol 83.71
    acetone 102.21
    n-butanol 83.88
    acetonitrile 120.17
    DMF 179.96
    toluene 70.14
    isobutanol 65.52
    1,4-dioxane 226.92
    methyl acetate 118.24
    THF 207.26
    2-butanone 83.79
    n-pentanol 56.92
    sec-butanol 57.38
    n-hexane 2.95
    ethylene glycol 50.78
    NMP 174.79
    cyclohexane 14.39
    DMSO 276.65
    n-butyl acetate 88.24
    n-octanol 19.25
    chloroform 519.96
    n-propyl acetate 63.34
    acetic acid 433.17
    dichloromethane 602.93
    cyclohexanone 197.52
    propylene glycol 36.3
    isopropyl acetate 55.9
    DMAc 171.06
    2-ethoxyethanol 123.32
    isopentanol 72.89
    n-heptane 4.1
    ethyl formate 167.85
    1,2-dichloroethane 271.18
    n-hexanol 53.05
    2-methoxyethanol 248.34
    isobutyl acetate 36.83
    tetrachloromethane 80.55
    n-pentyl acetate 42.34
    transcutol 279.72
    n-heptanol 25.2
    ethylbenzene 24.27
    MIBK 35.96
    2-propoxyethanol 111.34
    tert-butanol 90.04
    MTBE 58.3
    2-butoxyethanol 62.78
    propionic acid 144.08
    o-xylene 45.24
    formic acid 246.32
    diethyl ether 56.49
    m-xylene 36.88
    p-xylene 45.9
    chlorobenzene 161.04
    dimethyl carbonate 47.58
    n-octane 1.77
    formamide 335.07
    cyclopentanone 166.14
    2-pentanone 59.68
    anisole 65.74
    cyclopentyl methyl ether 73.54
    gamma-butyrolactone 267.59
    1-methoxy-2-propanol 108.08
    pyridine 325.32
    3-pentanone 50.83
    furfural 409.09
    n-dodecane 1.89
    diethylene glycol 113.91
    diisopropyl ether 13.18
    tert-amyl alcohol 76.98
    acetylacetone 93.89
    n-hexadecane 2.17
    acetophenone 75.62
    methyl propionate 86.18
    isopentyl acetate 77.13
    trichloroethylene 654.29
    n-nonanol 18.64
    cyclohexanol 92.88
    benzyl alcohol 82.35
    2-ethylhexanol 36.33
    isooctanol 22.06
    dipropyl ether 27.25
    1,2-dichlorobenzene 149.16
    ethyl lactate 38.25
    propylene carbonate 177.25
    n-methylformamide 177.76
    2-pentanol 38.97
    n-pentane 4.16
    1-propoxy-2-propanol 62.77
    1-methoxy-2-propyl acetate 75.82
    2-(2-methoxypropoxy) propanol 62.49
    mesitylene 23.23
    ε-caprolactone 176.82
    p-cymene 25.33
    epichlorohydrin 311.52
    1,1,1-trichloroethane 234.25
    2-aminoethanol 83.68
    morpholine-4-carbaldehyde 212.56
    sulfolane 275.54
    2,2,4-trimethylpentane 4.77
    2-methyltetrahydrofuran 147.38
    n-hexyl acetate 49.66
    isooctane 2.42
    2-(2-butoxyethoxy)ethanol 87.67
    sec-butyl acetate 36.41
    tert-butyl acetate 54.22
    decalin 6.43
    glycerin 79.88
    diglyme 174.19
    acrylic acid 168.28
    isopropyl myristate 19.03
    n-butyric acid 214.35
    acetyl acetate 123.5
    di(2-ethylhexyl) phthalate 34.4
    ethyl propionate 53.64
    nitromethane 475.34
    1,2-diethoxyethane 75.27
    benzonitrile 138.57
    trioctyl phosphate 20.15
    1-bromopropane 84.95
    gamma-valerolactone 294.3
    n-decanol 14.17
    triethyl phosphate 38.5
    4-methyl-2-pentanol 23.99
    propionitrile 100.21
    vinylene carbonate 205.48
    1,1,2-trichlorotrifluoroethane 291.33
    DMS 59.31
    cumene 20.19
    2-octanol 15.38
    2-hexanone 44.55
    octyl acetate 25.87
    limonene 34.05
    1,2-dimethoxyethane 158.85
    ethyl orthosilicate 38.25
    tributyl phosphate 28.62
    diacetone alcohol 67.98
    N,N-dimethylaniline 44.34
    acrylonitrile 160.18
    aniline 136.79
    1,3-propanediol 134.96
    bromobenzene 155.15
    dibromomethane 286.76
    1,1,2,2-tetrachloroethane 424.62
    2-methyl-cyclohexyl acetate 55.39
    tetrabutyl urea 34.77
    diisobutyl methanol 20.62
    2-phenylethanol 78.14
    styrene 36.87
    dioctyl adipate 40.1
    dimethyl sulfate 84.47
    ethyl butyrate 66.35
    methyl lactate 55.6
    butyl lactate 37.79
    diethyl carbonate 58.02
    propanediol butyl ether 46.24
    triethyl orthoformate 51.8
    p-tert-butyltoluene 22.53
    methyl 4-tert-butylbenzoate 58.47
    morpholine 231.72
    tert-butylamine 49.47
    n-dodecanol 11.51
    dimethoxymethane 102.06
    ethylene carbonate 152.71
    cyrene 71.53
    2-ethoxyethyl acetate 69.45
    2-ethylhexyl acetate 59.74
    1,2,4-trichlorobenzene 176.18
    4-methylpyridine 224.08
    dibutyl ether 24.79
    2,6-dimethyl-4-heptanol 20.62
    DEF 101.42
    dimethyl isosorbide 117.25
    tetrachloroethylene 333.47
    eugenol 67.54
    triacetin 60.36
    span 80 54.36
    1,4-butanediol 45.2
    1,1-dichloroethane 206.35
    2-methyl-1-pentanol 59.02
    methyl formate 151.27
    2-methyl-1-butanol 67.28
    n-decane 2.57
    butyronitrile 108.98
    3,7-dimethyl-1-octanol 24.82
    1-chlorooctane 14.11
    1-chlorotetradecane 6.91
    n-nonane 2.13
    undecane 2.15
    tert-butylcyclohexane 5.09
    cyclooctane 3.48
    cyclopentanol 93.09
    tetrahydropyran 149.93
    tert-amyl methyl ether 44.67
    2,5,8-trioxanonane 127.47
    1-hexene 14.32
    2-isopropoxyethanol 64.2
    2,2,2-trifluoroethanol 147.83
    methyl butyrate 82.63

    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