7-Ethyl-5,6-dihydro-1,4-dimethylazulene

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  • Identifiers

    CAS number
    18454-89-2

    Molecular formula
    C14H18

    SMILES
    CCC1=CC2=C(C=CC2=C(CC1)C)C

    Safety labels

  • Odor profile

    Fragrance
    Spicy 50.77%
    Fruity 50.46%
    Woody 48.88%
    Herbal 30.29%
    Floral 27.81%
    Fresh 27.34%
    Sweet 25.68%
    Tropical 25.54%
    Dry 23.92%
    Citrus 22.88%

     

    Flavor
    Herbal 42.04%
    Woody 39.28%
    Spicy 32.23%
    Spice 27.32%
    Wood 27.0%
    Fresh 24.94%
    Mint 23.72%
    Camphor 23.38%
    Basil 22.35%
    Floral 22.01%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    2.7

    pKa est.
    9.1 (weak base)

    Molecular weight
    186.29 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Very slow

    Boiling point est.
    289°C

    Flash point

    • 92.18 ˚C est.

  • Synonyms

    • 7-ethyl-1,4-dimethyl-5,6-dihydroazulene
    • 7-Ethyl-5,6-dihydro-1,4-dimethylazulene
    • CHEBI:230161
    • DTXSID901280048
    • 18454-89-2
    • 18454-89-2

  • Applications

    7-Ethyl-5,6-dihydro-1,4-dimethylazulene (CAS 18454-89-2) is typically used as an intermediate or building block in organic synthesis for azulene-derived materials. It may serve as a precursor for fragrance-related compounds in perfumery and cosmetics, as a dye/pigment precursor for coatings, inks, and plastics, and as a scaffold for developing specialty polymers or conjugated materials explored for electronics and optoelectronics, depending on formulation and regulatory constraints. It can also function as a laboratory reagent or reference material in analytical and synthetic workflows. Actual use is subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 41.47
    methanol 18.23
    isopropanol 55.33
    water 0.03
    ethyl acetate 183.52
    n-propanol 61.66
    acetone 199.59
    n-butanol 73.35
    acetonitrile 75.83
    DMF 320.84
    toluene 404.95
    isobutanol 66.36
    1,4-dioxane 401.56
    methyl acetate 188.69
    THF 577.8
    2-butanone 282.69
    n-pentanol 69.57
    sec-butanol 78.04
    n-hexane 82.96
    ethylene glycol 7.58
    NMP 388.87
    cyclohexane 133.21
    DMSO 139.08
    n-butyl acetate 332.67
    n-octanol 123.39
    chloroform 585.81
    n-propyl acetate 185.59
    acetic acid 35.16
    dichloromethane 584.82
    cyclohexanone 469.0
    propylene glycol 15.55
    isopropyl acetate 158.43
    DMAc 330.68
    2-ethoxyethanol 74.0
    isopentanol 82.47
    n-heptane 130.27
    ethyl formate 94.54
    1,2-dichloroethane 374.51
    n-hexanol 158.15
    2-methoxyethanol 79.65
    isobutyl acetate 175.44
    tetrachloromethane 146.41
    n-pentyl acetate 220.77
    transcutol 246.6
    n-heptanol 111.95
    ethylbenzene 281.86
    MIBK 172.22
    2-propoxyethanol 154.23
    tert-butanol 88.98
    MTBE 200.57
    2-butoxyethanol 119.93
    propionic acid 55.82
    o-xylene 264.61
    formic acid 3.94
    diethyl ether 190.04
    m-xylene 289.88
    p-xylene 348.24
    chlorobenzene 335.56
    dimethyl carbonate 98.76
    n-octane 71.62
    formamide 11.77
    cyclopentanone 536.52
    2-pentanone 217.09
    anisole 308.41
    cyclopentyl methyl ether 316.07
    gamma-butyrolactone 376.68
    1-methoxy-2-propanol 85.51
    pyridine 466.68
    3-pentanone 241.08
    furfural 291.68
    n-dodecane 54.68
    diethylene glycol 65.41
    diisopropyl ether 108.41
    tert-amyl alcohol 100.39
    acetylacetone 245.59
    n-hexadecane 64.66
    acetophenone 283.56
    methyl propionate 171.96
    isopentyl acetate 321.47
    trichloroethylene 669.35
    n-nonanol 119.89
    cyclohexanol 127.3
    benzyl alcohol 146.1
    2-ethylhexanol 175.03
    isooctanol 105.19
    dipropyl ether 279.99
    1,2-dichlorobenzene 312.68
    ethyl lactate 75.48
    propylene carbonate 237.06
    n-methylformamide 65.71
    2-pentanol 68.69
    n-pentane 57.27
    1-propoxy-2-propanol 150.44
    1-methoxy-2-propyl acetate 252.34
    2-(2-methoxypropoxy) propanol 171.87
    mesitylene 210.32
    ε-caprolactone 336.94
    p-cymene 222.85
    epichlorohydrin 420.76
    1,1,1-trichloroethane 430.65
    2-aminoethanol 16.82
    morpholine-4-carbaldehyde 339.06
    sulfolane 379.54
    2,2,4-trimethylpentane 44.52
    2-methyltetrahydrofuran 425.05
    n-hexyl acetate 295.43
    isooctane 39.7
    2-(2-butoxyethoxy)ethanol 172.47
    sec-butyl acetate 163.8
    tert-butyl acetate 195.78
    decalin 104.55
    glycerin 19.64
    diglyme 317.6
    acrylic acid 44.82
    isopropyl myristate 185.29
    n-butyric acid 89.58
    acetyl acetate 142.61
    di(2-ethylhexyl) phthalate 141.0
    ethyl propionate 184.17
    nitromethane 87.17
    1,2-diethoxyethane 275.27
    benzonitrile 237.09
    trioctyl phosphate 107.72
    1-bromopropane 318.15
    gamma-valerolactone 426.32
    n-decanol 103.31
    triethyl phosphate 148.02
    4-methyl-2-pentanol 64.99
    propionitrile 119.63
    vinylene carbonate 211.87
    1,1,2-trichlorotrifluoroethane 161.3
    DMS 245.28
    cumene 197.14
    2-octanol 105.12
    2-hexanone 212.44
    octyl acetate 201.83
    limonene 286.53
    1,2-dimethoxyethane 258.42
    ethyl orthosilicate 141.79
    tributyl phosphate 122.54
    diacetone alcohol 143.97
    N,N-dimethylaniline 248.84
    acrylonitrile 118.94
    aniline 179.65
    1,3-propanediol 30.85
    bromobenzene 463.79
    dibromomethane 423.91
    1,1,2,2-tetrachloroethane 487.15
    2-methyl-cyclohexyl acetate 252.96
    tetrabutyl urea 179.92
    diisobutyl methanol 120.57
    2-phenylethanol 211.07
    styrene 295.29
    dioctyl adipate 213.95
    dimethyl sulfate 143.18
    ethyl butyrate 255.05
    methyl lactate 57.38
    butyl lactate 116.27
    diethyl carbonate 178.27
    propanediol butyl ether 85.9
    triethyl orthoformate 181.64
    p-tert-butyltoluene 209.36
    methyl 4-tert-butylbenzoate 256.62
    morpholine 331.84
    tert-butylamine 77.9
    n-dodecanol 92.55
    dimethoxymethane 211.28
    ethylene carbonate 174.46
    cyrene 174.09
    2-ethoxyethyl acetate 232.62
    2-ethylhexyl acetate 306.56
    1,2,4-trichlorobenzene 358.32
    4-methylpyridine 443.58
    dibutyl ether 244.43
    2,6-dimethyl-4-heptanol 120.57
    DEF 249.35
    dimethyl isosorbide 354.44
    tetrachloroethylene 301.47
    eugenol 192.82
    triacetin 224.49
    span 80 151.25
    1,4-butanediol 21.74
    1,1-dichloroethane 352.79
    2-methyl-1-pentanol 88.41
    methyl formate 66.67
    2-methyl-1-butanol 85.0
    n-decane 82.54
    butyronitrile 131.06
    3,7-dimethyl-1-octanol 132.29
    1-chlorooctane 188.2
    1-chlorotetradecane 102.41
    n-nonane 85.03
    undecane 66.41
    tert-butylcyclohexane 95.04
    cyclooctane 76.89
    cyclopentanol 130.62
    tetrahydropyran 433.89
    tert-amyl methyl ether 179.57
    2,5,8-trioxanonane 262.44
    1-hexene 173.4
    2-isopropoxyethanol 84.87
    2,2,2-trifluoroethanol 17.23
    methyl butyrate 219.01

    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