2-Acetyl-1,4,5,6-tetrahydropyridine

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  • Identifiers

    CAS number
    25343-57-1

    Molecular formula
    C7H11NO

    SMILES
    CC(=O)C1=CCCCN1

  • Odor profile

    Fragrance
    Nutty 73.6%
    Roasted 66.77%
    Popcorn 60.6%
    Caramellic 56.57%
    Sweet 41.18%
    Burnt 39.03%
    Buttery 29.89%
    Musty 27.28%
    Coffee 26.93%
    Hazelnut 26.55%

     

    Flavor
    Roasted 39.25%
    Nutty 38.79%
    Roast 32.39%
    Cooked 27.37%
    Popcorn 25.02%
    Nut 24.82%
    Taco 23.69%
    Chip 23.61%
    Corn 23.38%
    Bread crust 22.12%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    1.1

    pKa est.
    7.42 (neutral)

    Molecular weight
    125.17 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Moderately slow

    Boiling point est.
    221°C

    Flash point

    • 96.14 ˚C est.

  • Synonyms

    • 25343-57-1
    • 2-Acetyl-1,4,5,6-tetrahydropyridine
    • 2-Acetyltetrahydropyridine
    • Ethanone, 1-(1,4,5,6-tetrahydro-2-pyridinyl)-
    • 1-(1,4,5,6-tetrahydropyridin-2-yl)ethanone
    • 6-acetyl-1,2,3,4-tetrahydropyridine
    • 1-(1,2,3,4-tetrahydropyridin-6-yl)ethanone
    • 1,4,5,6-Tetrahydro-2-acetopyridine
    • 1-(1,4,5,6-tetrahydropyridin-2-yl)ethan-1-one
    • SCHEMBL2130103
    • CHEBI:59534
    • HRAOWRVFLSYJKN-UHFFFAOYSA-N
    • AKOS006312668
    • 1-(1,4,5,6-Tetrahydro-2-pyridinyl)ethanone #
    • Q27126768

  • Applications

    2-Acetyl-1,4,5,6-tetrahydropyridine (CAS 25343-57-1) is mainly used as an intermediate in fragrance chemistry, serving as a building block for cyclic aroma compounds and as an odorant in perfumery; it may be evaluated for use in flavor and fragrance formulations to contribute specific scent notes and is encountered in cosmetics/personal care and household products as a fragrance component; in industrial manufacturing and polymer/plastics sectors it is used as a synthetic intermediate within fragrance systems or as a specialty chemical precursor; its role is typically as an odorant or scent-formation intermediate rather than a primary active ingredient, with use governed by local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 385.34
    methanol 768.92
    isopropanol 218.94
    water 27.53
    ethyl acetate 120.11
    n-propanol 261.81
    acetone 238.88
    n-butanol 193.58
    acetonitrile 230.21
    DMF 529.06
    toluene 67.6
    isobutanol 167.61
    1,4-dioxane 358.79
    methyl acetate 130.8
    THF 314.6
    2-butanone 158.88
    n-pentanol 143.88
    sec-butanol 149.48
    n-hexane 8.84
    ethylene glycol 209.66
    NMP 488.5
    cyclohexane 7.78
    DMSO 734.38
    n-butyl acetate 82.73
    n-octanol 78.5
    chloroform 490.82
    n-propyl acetate 69.53
    acetic acid 408.65
    dichloromethane 418.4
    cyclohexanone 233.8
    propylene glycol 164.32
    isopropyl acetate 74.11
    DMAc 306.69
    2-ethoxyethanol 225.65
    isopentanol 131.78
    n-heptane 7.16
    ethyl formate 130.49
    1,2-dichloroethane 192.46
    n-hexanol 132.45
    2-methoxyethanol 398.07
    isobutyl acetate 52.46
    tetrachloromethane 69.55
    n-pentyl acetate 73.25
    transcutol 575.36
    n-heptanol 73.69
    ethylbenzene 34.98
    MIBK 85.99
    2-propoxyethanol 238.43
    tert-butanol 178.33
    MTBE 99.31
    2-butoxyethanol 146.58
    propionic acid 252.16
    o-xylene 56.27
    formic acid 339.93
    diethyl ether 101.08
    m-xylene 61.74
    p-xylene 46.38
    chlorobenzene 137.48
    dimethyl carbonate 54.1
    n-octane 4.83
    formamide 258.99
    cyclopentanone 337.58
    2-pentanone 127.23
    anisole 86.05
    cyclopentyl methyl ether 144.34
    gamma-butyrolactone 395.32
    1-methoxy-2-propanol 253.56
    pyridine 236.19
    3-pentanone 90.18
    furfural 366.69
    n-dodecane 5.92
    diethylene glycol 264.99
    diisopropyl ether 28.86
    tert-amyl alcohol 132.79
    acetylacetone 149.67
    n-hexadecane 6.55
    acetophenone 91.82
    methyl propionate 111.04
    isopentyl acetate 72.38
    trichloroethylene 399.26
    n-nonanol 62.89
    cyclohexanol 117.63
    benzyl alcohol 109.11
    2-ethylhexanol 65.74
    isooctanol 60.83
    dipropyl ether 47.76
    1,2-dichlorobenzene 118.02
    ethyl lactate 67.18
    propylene carbonate 182.45
    n-methylformamide 325.96
    2-pentanol 102.86
    n-pentane 9.17
    1-propoxy-2-propanol 142.8
    1-methoxy-2-propyl acetate 98.32
    2-(2-methoxypropoxy) propanol 122.46
    mesitylene 40.18
    ε-caprolactone 197.43
    p-cymene 31.18
    epichlorohydrin 325.09
    1,1,1-trichloroethane 169.01
    2-aminoethanol 298.43
    morpholine-4-carbaldehyde 372.39
    sulfolane 487.88
    2,2,4-trimethylpentane 9.28
    2-methyltetrahydrofuran 215.74
    n-hexyl acetate 109.01
    isooctane 8.2
    2-(2-butoxyethoxy)ethanol 178.23
    sec-butyl acetate 49.48
    tert-butyl acetate 78.7
    decalin 9.54
    glycerin 265.49
    diglyme 281.59
    acrylic acid 263.85
    isopropyl myristate 40.34
    n-butyric acid 222.08
    acetyl acetate 92.67
    di(2-ethylhexyl) phthalate 54.41
    ethyl propionate 61.67
    nitromethane 432.61
    1,2-diethoxyethane 114.51
    benzonitrile 160.47
    trioctyl phosphate 42.01
    1-bromopropane 112.33
    gamma-valerolactone 370.46
    n-decanol 46.73
    triethyl phosphate 41.6
    4-methyl-2-pentanol 62.45
    propionitrile 163.9
    vinylene carbonate 179.64
    1,1,2-trichlorotrifluoroethane 261.18
    DMS 85.01
    cumene 31.58
    2-octanol 49.89
    2-hexanone 85.69
    octyl acetate 56.09
    limonene 41.73
    1,2-dimethoxyethane 237.23
    ethyl orthosilicate 40.53
    tributyl phosphate 47.16
    diacetone alcohol 120.73
    N,N-dimethylaniline 69.67
    acrylonitrile 246.01
    aniline 145.16
    1,3-propanediol 260.79
    bromobenzene 123.55
    dibromomethane 249.72
    1,1,2,2-tetrachloroethane 299.22
    2-methyl-cyclohexyl acetate 59.21
    tetrabutyl urea 61.74
    diisobutyl methanol 40.12
    2-phenylethanol 98.07
    styrene 45.0
    dioctyl adipate 58.04
    dimethyl sulfate 125.19
    ethyl butyrate 59.45
    methyl lactate 108.63
    butyl lactate 73.1
    diethyl carbonate 43.4
    propanediol butyl ether 159.47
    triethyl orthoformate 47.33
    p-tert-butyltoluene 29.38
    methyl 4-tert-butylbenzoate 94.27
    morpholine 316.83
    tert-butylamine 103.81
    n-dodecanol 35.44
    dimethoxymethane 185.32
    ethylene carbonate 129.88
    cyrene 123.16
    2-ethoxyethyl acetate 103.39
    2-ethylhexyl acetate 56.33
    1,2,4-trichlorobenzene 145.95
    4-methylpyridine 218.65
    dibutyl ether 52.79
    2,6-dimethyl-4-heptanol 40.12
    DEF 169.61
    dimethyl isosorbide 167.61
    tetrachloroethylene 210.76
    eugenol 110.79
    triacetin 103.05
    span 80 109.15
    1,4-butanediol 144.9
    1,1-dichloroethane 212.45
    2-methyl-1-pentanol 111.42
    methyl formate 215.14
    2-methyl-1-butanol 135.65
    n-decane 9.03
    butyronitrile 156.78
    3,7-dimethyl-1-octanol 66.1
    1-chlorooctane 41.03
    1-chlorotetradecane 17.33
    n-nonane 8.33
    undecane 7.12
    tert-butylcyclohexane 11.78
    cyclooctane 4.12
    cyclopentanol 176.42
    tetrahydropyran 182.8
    tert-amyl methyl ether 74.5
    2,5,8-trioxanonane 189.24
    1-hexene 38.91
    2-isopropoxyethanol 139.4
    2,2,2-trifluoroethanol 159.2
    methyl butyrate 87.03

    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