2,3-Dimethyl-5-propylpyrazine

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  • Identifiers

    CAS number
    32262-98-9

    Molecular formula
    C9H14N2

    SMILES
    CCCC1=CN=C(C(=N1)C)C

    Safety labels

  • Odor profile

    Fragrance
    Nutty 71.35%
    Roasted 66.43%
    Earthy 58.57%
    Cocoa 53.24%
    Hazelnut 52.77%
    Burnt 52.23%
    Musty 51.04%
    Chocolate 42.69%
    Coffee 42.43%
    Potato 41.61%

     

    Flavor
    Nutty 62.01%
    Roasted 58.6%
    Earthy 53.97%
    Potato 49.43%
    Musty 46.33%
    Meaty 44.41%
    Hazelnut 44.26%
    Burnt 42.9%
    Roast 42.36%
    Cocoa 41.38%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    1.7

    pKa est.
    4.92 (weak acid)

    Molecular weight
    150.22 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Moderate

    Boiling point est.
    222°C

    Flash point

    • 84.33 ˚C est.

  • Synonyms

    • 2,3-Dimethyl-5-propylpyrazine
    • 32262-98-9
    • 2,3-Dimethyl-5-n-propylpyrazine
    • DTXSID80334395
    • RefChem:81837
    • DTXCID90285485
    • RHCYSZMTNWMCOO-UHFFFAOYSA-N
    • PYRAZINE, 2,3-DIMETHYL-5-PROPYL- (8CI,9CI)
    • Pyrazine, 2,3-dimethyl-5-propyl-
    • SCHEMBL9953811
    • CHEBI:193684
    • AKOS006370456
    • DB-086747
    • NS00113838
    • 32262-98-9

  • Applications

    2,3-Dimethyl-5-propylpyrazine (CAS 32262-98-9) is primarily used as an odorant and flavoring agent in the fragrance and food industries. It is evaluated for roasted, nutty, and savory notes that can enhance meat, snack, and seasoned profiles. In perfumery and cosmetics, it serves as a fragrance ingredient contributing woody-roasted facets to formulations. It is also used as an intermediate in the synthesis of related pyrazine derivatives for industrial manufacturing. In household products and air fresheners, it can impart characteristic aroma notes, and in coatings, inks, or polymer formulations it may serve as an odorant or aroma additive under regulatory constraints. Use is typically governed by local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 378.96
    methanol 456.42
    isopropanol 267.65
    water 1.95
    ethyl acetate 255.48
    n-propanol 346.29
    acetone 263.43
    n-butanol 353.73
    acetonitrile 244.57
    DMF 419.47
    toluene 300.92
    isobutanol 309.23
    1,4-dioxane 499.84
    methyl acetate 233.28
    THF 612.11
    2-butanone 285.92
    n-pentanol 289.96
    sec-butanol 306.95
    n-hexane 133.85
    ethylene glycol 64.78
    NMP 500.78
    cyclohexane 208.64
    DMSO 338.89
    n-butyl acetate 442.25
    n-octanol 190.66
    chloroform 1900.62
    n-propyl acetate 206.96
    acetic acid 340.17
    dichloromethane 1453.17
    cyclohexanone 605.49
    propylene glycol 87.62
    isopropyl acetate 163.55
    DMAc 408.96
    2-ethoxyethanol 231.44
    isopentanol 302.88
    n-heptane 97.78
    ethyl formate 279.73
    1,2-dichloroethane 640.13
    n-hexanol 388.31
    2-methoxyethanol 341.95
    isobutyl acetate 164.78
    tetrachloromethane 426.41
    n-pentyl acetate 235.5
    transcutol 527.07
    n-heptanol 195.8
    ethylbenzene 187.68
    MIBK 160.18
    2-propoxyethanol 359.2
    tert-butanol 273.1
    MTBE 286.82
    2-butoxyethanol 241.88
    propionic acid 244.38
    o-xylene 203.14
    formic acid 121.61
    diethyl ether 292.6
    m-xylene 189.59
    p-xylene 274.22
    chlorobenzene 505.06
    dimethyl carbonate 100.69
    n-octane 47.93
    formamide 124.45
    cyclopentanone 529.34
    2-pentanone 233.87
    anisole 225.68
    cyclopentyl methyl ether 332.76
    gamma-butyrolactone 578.48
    1-methoxy-2-propanol 225.72
    pyridine 598.25
    3-pentanone 225.31
    furfural 600.4
    n-dodecane 37.19
    diethylene glycol 209.65
    diisopropyl ether 103.11
    tert-amyl alcohol 304.49
    acetylacetone 219.84
    n-hexadecane 41.64
    acetophenone 224.06
    methyl propionate 198.23
    isopentyl acetate 367.33
    trichloroethylene 1232.77
    n-nonanol 160.89
    cyclohexanol 333.61
    benzyl alcohol 227.94
    2-ethylhexanol 268.67
    isooctanol 154.29
    dipropyl ether 235.12
    1,2-dichlorobenzene 451.68
    ethyl lactate 107.73
    propylene carbonate 421.88
    n-methylformamide 221.32
    2-pentanol 221.99
    n-pentane 102.78
    1-propoxy-2-propanol 282.83
    1-methoxy-2-propyl acetate 234.04
    2-(2-methoxypropoxy) propanol 189.91
    mesitylene 128.53
    ε-caprolactone 448.55
    p-cymene 161.5
    epichlorohydrin 588.06
    1,1,1-trichloroethane 711.8
    2-aminoethanol 136.15
    morpholine-4-carbaldehyde 411.69
    sulfolane 578.88
    2,2,4-trimethylpentane 62.36
    2-methyltetrahydrofuran 496.09
    n-hexyl acetate 298.03
    isooctane 36.51
    2-(2-butoxyethoxy)ethanol 232.23
    sec-butyl acetate 145.89
    tert-butyl acetate 161.77
    decalin 86.3
    glycerin 110.22
    diglyme 398.69
    acrylic acid 213.47
    isopropyl myristate 122.46
    n-butyric acid 390.66
    acetyl acetate 191.23
    di(2-ethylhexyl) phthalate 139.94
    ethyl propionate 167.04
    nitromethane 329.52
    1,2-diethoxyethane 282.22
    benzonitrile 406.39
    trioctyl phosphate 99.63
    1-bromopropane 499.51
    gamma-valerolactone 569.81
    n-decanol 121.07
    triethyl phosphate 133.33
    4-methyl-2-pentanol 127.53
    propionitrile 300.91
    vinylene carbonate 430.08
    1,1,2-trichlorotrifluoroethane 417.17
    DMS 192.2
    cumene 146.28
    2-octanol 145.77
    2-hexanone 239.45
    octyl acetate 158.36
    limonene 224.25
    1,2-dimethoxyethane 410.49
    ethyl orthosilicate 136.69
    tributyl phosphate 124.79
    diacetone alcohol 164.39
    N,N-dimethylaniline 192.23
    acrylonitrile 315.82
    aniline 310.85
    1,3-propanediol 220.81
    bromobenzene 584.09
    dibromomethane 1046.04
    1,1,2,2-tetrachloroethane 1054.24
    2-methyl-cyclohexyl acetate 212.77
    tetrabutyl urea 153.8
    diisobutyl methanol 125.78
    2-phenylethanol 281.15
    styrene 232.56
    dioctyl adipate 169.44
    dimethyl sulfate 153.36
    ethyl butyrate 251.62
    methyl lactate 106.72
    butyl lactate 176.03
    diethyl carbonate 184.55
    propanediol butyl ether 189.48
    triethyl orthoformate 189.95
    p-tert-butyltoluene 144.99
    methyl 4-tert-butylbenzoate 195.82
    morpholine 469.23
    tert-butylamine 231.28
    n-dodecanol 98.89
    dimethoxymethane 228.49
    ethylene carbonate 358.28
    cyrene 181.05
    2-ethoxyethyl acetate 229.16
    2-ethylhexyl acetate 315.5
    1,2,4-trichlorobenzene 470.8
    4-methylpyridine 580.1
    dibutyl ether 241.73
    2,6-dimethyl-4-heptanol 125.78
    DEF 321.46
    dimethyl isosorbide 321.27
    tetrachloroethylene 800.08
    eugenol 203.79
    triacetin 196.83
    span 80 198.32
    1,4-butanediol 111.88
    1,1-dichloroethane 674.33
    2-methyl-1-pentanol 276.61
    methyl formate 199.89
    2-methyl-1-butanol 334.37
    n-decane 60.2
    butyronitrile 388.18
    3,7-dimethyl-1-octanol 174.68
    1-chlorooctane 180.0
    1-chlorotetradecane 77.32
    n-nonane 63.87
    undecane 45.48
    tert-butylcyclohexane 77.28
    cyclooctane 67.52
    cyclopentanol 331.2
    tetrahydropyran 549.08
    tert-amyl methyl ether 233.64
    2,5,8-trioxanonane 275.44
    1-hexene 291.85
    2-isopropoxyethanol 166.28
    2,2,2-trifluoroethanol 119.41
    methyl butyrate 263.58

    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