Pyrazine, 2-methyl-3-(3-methylbutyl)-

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  • Identifiers

    CAS number
    32737-06-7

    Molecular formula
    C10H16N2

    SMILES
    CC1=NC=CN=C1CCC(C)C

  • Odor profile

    Fragrance
    Green 68.69%
    Earthy 53.51%
    Nutty 47.79%
    Fruity 41.78%
    Vegetable 40.15%
    Roasted 38.53%
    Burnt 34.1%
    Musty 33.31%
    Woody 32.93%
    Leafy 30.65%

     

    Flavor
    Green 75.75%
    Herbal 56.42%
    Pepper 48.2%
    Earthy 47.55%
    Musty 38.69%
    Earth 37.25%
    Pea 33.46%
    Raw 31.11%
    Spice 29.94%
    Vegetable 29.68%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    2.4

    pKa est.
    5.03 (weak acid)

    Molecular weight
    164.25 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Moderately slow

    Boiling point est.
    246°C

    Flash point

    • 100.13 ˚C est.

  • Synonyms

    • 2-Methyl-3-(3-methylbutyl)pyrazine
    • Pyrazine, 2-methyl-3-(3-methylbutyl)-
    • 32737-06-7
    • DTXSID5067712
    • DTXCID8038564
    • SCHEMBL10203039
    • DFLVTNJDHBTOSQ-UHFFFAOYSA-N

  • Applications

    Pyrazine, 2-methyl-3-(3-methylbutyl)- (CAS 32737-06-7) is primarily used as a fragrance ingredient in perfumery, providing roasted and complex aroma notes. It is also evaluated as an aroma compound for flavor applications in processed foods and beverages under controlled usage. In cosmetics and personal care, it can serve as a fragrance component in products such as moisturizers and cleansers. In household and cleaning products, it can contribute to pleasant scents and odor masking. In industrial manufacturing and the plastics/coatings sector, it may be used as an odorant or as an intermediate in aroma-related syntheses.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 266.04
    methanol 249.6
    isopropanol 152.61
    water 0.62
    ethyl acetate 206.27
    n-propanol 204.38
    acetone 205.37
    n-butanol 219.22
    acetonitrile 145.9
    DMF 299.28
    toluene 183.61
    isobutanol 167.1
    1,4-dioxane 380.7
    methyl acetate 174.39
    THF 532.1
    2-butanone 193.85
    n-pentanol 145.74
    sec-butanol 143.5
    n-hexane 24.39
    ethylene glycol 47.46
    NMP 312.78
    cyclohexane 69.59
    DMSO 282.0
    n-butyl acetate 401.79
    n-octanol 71.62
    chloroform 1034.83
    n-propyl acetate 132.36
    acetic acid 260.08
    dichloromethane 829.46
    cyclohexanone 452.13
    propylene glycol 79.44
    isopropyl acetate 128.2
    DMAc 250.88
    2-ethoxyethanol 151.35
    isopentanol 179.37
    n-heptane 33.72
    ethyl formate 212.05
    1,2-dichloroethane 415.59
    n-hexanol 297.88
    2-methoxyethanol 285.62
    isobutyl acetate 105.35
    tetrachloromethane 185.4
    n-pentyl acetate 119.19
    transcutol 579.3
    n-heptanol 96.69
    ethylbenzene 75.75
    MIBK 93.48
    2-propoxyethanol 318.9
    tert-butanol 176.64
    MTBE 148.5
    2-butoxyethanol 158.58
    propionic acid 181.1
    o-xylene 109.28
    formic acid 76.57
    diethyl ether 139.2
    m-xylene 112.7
    p-xylene 116.59
    chlorobenzene 301.94
    dimethyl carbonate 56.68
    n-octane 10.7
    formamide 82.28
    cyclopentanone 420.93
    2-pentanone 155.52
    anisole 122.29
    cyclopentyl methyl ether 224.73
    gamma-butyrolactone 449.52
    1-methoxy-2-propanol 192.43
    pyridine 431.37
    3-pentanone 121.21
    furfural 471.34
    n-dodecane 9.66
    diethylene glycol 209.46
    diisopropyl ether 42.87
    tert-amyl alcohol 157.8
    acetylacetone 174.69
    n-hexadecane 11.02
    acetophenone 127.63
    methyl propionate 136.25
    isopentyl acetate 302.25
    trichloroethylene 854.01
    n-nonanol 65.1
    cyclohexanol 223.42
    benzyl alcohol 139.33
    2-ethylhexanol 181.12
    isooctanol 72.17
    dipropyl ether 153.25
    1,2-dichlorobenzene 256.98
    ethyl lactate 66.3
    propylene carbonate 352.69
    n-methylformamide 143.96
    2-pentanol 112.74
    n-pentane 25.17
    1-propoxy-2-propanol 252.14
    1-methoxy-2-propyl acetate 253.48
    2-(2-methoxypropoxy) propanol 132.12
    mesitylene 68.65
    ε-caprolactone 346.93
    p-cymene 88.71
    epichlorohydrin 448.46
    1,1,1-trichloroethane 410.52
    2-aminoethanol 103.58
    morpholine-4-carbaldehyde 354.55
    sulfolane 425.76
    2,2,4-trimethylpentane 19.27
    2-methyltetrahydrofuran 401.11
    n-hexyl acetate 150.96
    isooctane 11.4
    2-(2-butoxyethoxy)ethanol 182.65
    sec-butyl acetate 89.72
    tert-butyl acetate 128.02
    decalin 30.63
    glycerin 99.17
    diglyme 321.29
    acrylic acid 161.26
    isopropyl myristate 62.09
    n-butyric acid 356.43
    acetyl acetate 147.52
    di(2-ethylhexyl) phthalate 85.51
    ethyl propionate 99.5
    nitromethane 266.71
    1,2-diethoxyethane 228.09
    benzonitrile 237.9
    trioctyl phosphate 59.01
    1-bromopropane 246.68
    gamma-valerolactone 508.03
    n-decanol 51.35
    triethyl phosphate 86.29
    4-methyl-2-pentanol 68.92
    propionitrile 169.72
    vinylene carbonate 310.27
    1,1,2-trichlorotrifluoroethane 336.67
    DMS 116.84
    cumene 59.85
    2-octanol 53.57
    2-hexanone 125.06
    octyl acetate 83.32
    limonene 138.21
    1,2-dimethoxyethane 246.35
    ethyl orthosilicate 90.84
    tributyl phosphate 76.41
    diacetone alcohol 137.34
    N,N-dimethylaniline 92.41
    acrylonitrile 189.7
    aniline 228.02
    1,3-propanediol 164.5
    bromobenzene 329.16
    dibromomethane 545.31
    1,1,2,2-tetrachloroethane 676.08
    2-methyl-cyclohexyl acetate 160.32
    tetrabutyl urea 92.39
    diisobutyl methanol 82.84
    2-phenylethanol 192.35
    styrene 99.42
    dioctyl adipate 101.42
    dimethyl sulfate 90.59
    ethyl butyrate 195.53
    methyl lactate 80.09
    butyl lactate 110.98
    diethyl carbonate 127.31
    propanediol butyl ether 121.58
    triethyl orthoformate 144.65
    p-tert-butyltoluene 83.92
    methyl 4-tert-butylbenzoate 118.54
    morpholine 434.95
    tert-butylamine 128.3
    n-dodecanol 43.33
    dimethoxymethane 150.13
    ethylene carbonate 265.85
    cyrene 124.69
    2-ethoxyethyl acetate 160.91
    2-ethylhexyl acetate 250.39
    1,2,4-trichlorobenzene 280.43
    4-methylpyridine 400.47
    dibutyl ether 100.77
    2,6-dimethyl-4-heptanol 82.84
    DEF 189.5
    dimethyl isosorbide 270.17
    tetrachloroethylene 475.4
    eugenol 123.67
    triacetin 120.71
    span 80 143.51
    1,4-butanediol 67.85
    1,1-dichloroethane 387.46
    2-methyl-1-pentanol 141.04
    methyl formate 129.42
    2-methyl-1-butanol 175.34
    n-decane 14.54
    butyronitrile 221.28
    3,7-dimethyl-1-octanol 82.44
    1-chlorooctane 61.03
    1-chlorotetradecane 28.37
    n-nonane 13.47
    undecane 11.48
    tert-butylcyclohexane 26.14
    cyclooctane 21.2
    cyclopentanol 203.43
    tetrahydropyran 414.1
    tert-amyl methyl ether 109.06
    2,5,8-trioxanonane 218.69
    1-hexene 93.81
    2-isopropoxyethanol 106.58
    2,2,2-trifluoroethanol 80.54
    methyl butyrate 160.5

    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