8-Ethyl-1,3,4,6,7,8-hexahydro-4,6,6,8-tetramethylcyclopenta(g)-2-benzopyran

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  • Identifiers

    CAS number
    78448-49-4

    Molecular formula
    C18H26O

    SMILES
    CCC1(CC(C2=C1C=C3COCC(C3=C2)C)(C)C)C

    Safety labels

  • Odor profile

    Fragrance
    Musk 63.36%
    Sweet 46.25%
    Amber 43.13%
    Powdery 40.82%
    Woody 40.45%
    Floral 39.45%
    Animal 35.67%
    Dry 34.39%
    Fruity 33.06%
    Spicy 28.55%

     

    Flavor
    Woody 56.4%
    Camphor 42.26%
    Earthy 38.41%
    Earth 32.25%
    Musty 31.76%
    Spicy 30.64%
    Spice 30.07%
    Wood 29.56%
    Herbal 25.65%
    Pine 24.78%

     

    Odor impact est.
    Medium

  • Properties

    XLogP3-AA
    5.1

    pKa est.
    6.61 (neutral)

    Molecular weight
    258.4 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    344°C

    Flash point

    • 150.66 ˚C est.

  • Synonyms

    • 78448-49-4
    • 8-ETHYL-1,3,4,6,7,8-HEXAHYDRO-4,6,6,8-TETRAMETHYLCYCLOPENTA[G]-2-BENZOPYRAN
    • 8-Ethyl-1,3,4,6,7,8-hexahydro-4,6,6,8-tetramethylcyclopenta(g)-2-benzopyran
    • RefChem:1074694
    • 278-913-0
    • EINECS 278-913-0
    • 8-Ethyl-4,6,6,8-tetramethyl-1,3,4,6,7,8-hexahydrocyclopenta[g]isochromene
    • 8-ETHYL-4,6,6,8-TETRAMETHYL-3,4,6,7-TETRAHYDRO-1H-CYCLOPENTA(G)-2-BENZOPYRAN
    • SCHEMBL3946772
    • DTXSID50999778
    • BYAUGQHXQRQQPB-UHFFFAOYSA-N
    • NS00058399
    • 8-Ethyl-4,6,6,8-tetramethyl-1,3,4,6,7,8-hexahydroindeno[5,6-c]pyran
    • 78448-49-4

  • Applications

    8-Ethyl-1,3,4,6,7,8-hexahydro-4,6,6,8-tetramethylcyclopenta(g)-2-benzopyran (CAS 78448-49-4) is used as an odorant and fragrance ingredient in perfumery and cosmetics, where it can contribute to aroma profiles and may function as a fixative to extend scent longevity. It is occasionally evaluated for use in flavor formulations and may be employed in household and personal care products as a fragrance additive. In industrial manufacturing, it can serve as an intermediate or specialty chemical in fragrance chemistry and related synthesis. It may also be incorporated into coatings, inks, or polymer formulations, acting as a scent component where permitted. Use is subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 521.41
    methanol 302.17
    isopropanol 418.52
    water 0.47
    ethyl acetate 1163.29
    n-propanol 651.7
    acetone 1134.0
    n-butanol 658.21
    acetonitrile 765.42
    DMF 1292.02
    toluene 1582.69
    isobutanol 537.47
    1,4-dioxane 2180.83
    methyl acetate 1014.75
    THF 2548.1
    2-butanone 1159.22
    n-pentanol 407.91
    sec-butanol 364.07
    n-hexane 146.56
    ethylene glycol 62.85
    NMP 1066.11
    cyclohexane 389.62
    DMSO 412.78
    n-butyl acetate 1185.54
    n-octanol 272.82
    chloroform 3226.05
    n-propyl acetate 770.56
    acetic acid 335.82
    dichloromethane 2892.54
    cyclohexanone 1921.32
    propylene glycol 96.68
    isopropyl acetate 845.94
    DMAc 897.03
    2-ethoxyethanol 539.68
    isopentanol 604.75
    n-heptane 131.01
    ethyl formate 688.66
    1,2-dichloroethane 1895.36
    n-hexanol 688.74
    2-methoxyethanol 726.29
    isobutyl acetate 673.58
    tetrachloromethane 658.21
    n-pentyl acetate 758.17
    transcutol 1537.82
    n-heptanol 346.38
    ethylbenzene 619.75
    MIBK 735.38
    2-propoxyethanol 993.46
    tert-butanol 426.28
    MTBE 921.95
    2-butoxyethanol 591.14
    propionic acid 427.0
    o-xylene 658.45
    formic acid 74.26
    diethyl ether 1198.28
    m-xylene 903.02
    p-xylene 754.84
    chlorobenzene 1558.31
    dimethyl carbonate 518.44
    n-octane 52.03
    formamide 154.97
    cyclopentanone 1881.78
    2-pentanone 1062.85
    anisole 868.6
    cyclopentyl methyl ether 1428.47
    gamma-butyrolactone 1724.14
    1-methoxy-2-propanol 554.43
    pyridine 1930.31
    3-pentanone 931.7
    furfural 1412.63
    n-dodecane 35.19
    diethylene glycol 451.08
    diisopropyl ether 442.37
    tert-amyl alcohol 331.09
    acetylacetone 1011.37
    n-hexadecane 44.77
    acetophenone 759.44
    methyl propionate 971.65
    isopentyl acetate 1142.73
    trichloroethylene 3231.71
    n-nonanol 255.67
    cyclohexanol 689.01
    benzyl alcohol 614.55
    2-ethylhexanol 477.25
    isooctanol 297.98
    dipropyl ether 689.62
    1,2-dichlorobenzene 1268.48
    ethyl lactate 286.34
    propylene carbonate 1066.23
    n-methylformamide 514.96
    2-pentanol 376.07
    n-pentane 164.97
    1-propoxy-2-propanol 657.12
    1-methoxy-2-propyl acetate 1014.44
    2-(2-methoxypropoxy) propanol 417.01
    mesitylene 543.42
    ε-caprolactone 1529.3
    p-cymene 410.66
    epichlorohydrin 2236.7
    1,1,1-trichloroethane 1747.66
    2-aminoethanol 176.74
    morpholine-4-carbaldehyde 1464.24
    sulfolane 1161.7
    2,2,4-trimethylpentane 88.04
    2-methyltetrahydrofuran 1812.21
    n-hexyl acetate 902.79
    isooctane 84.08
    2-(2-butoxyethoxy)ethanol 561.16
    sec-butyl acetate 598.92
    tert-butyl acetate 778.1
    decalin 173.19
    glycerin 124.67
    diglyme 1231.85
    acrylic acid 342.88
    isopropyl myristate 317.77
    n-butyric acid 744.18
    acetyl acetate 672.71
    di(2-ethylhexyl) phthalate 306.06
    ethyl propionate 653.55
    nitromethane 742.0
    1,2-diethoxyethane 940.36
    benzonitrile 1054.97
    trioctyl phosphate 223.22
    1-bromopropane 1232.92
    gamma-valerolactone 2286.68
    n-decanol 178.61
    triethyl phosphate 325.85
    4-methyl-2-pentanol 305.3
    propionitrile 807.89
    vinylene carbonate 1142.89
    1,1,2-trichlorotrifluoroethane 935.24
    DMS 731.71
    cumene 393.88
    2-octanol 226.11
    2-hexanone 702.4
    octyl acetate 384.64
    limonene 478.33
    1,2-dimethoxyethane 1152.03
    ethyl orthosilicate 337.09
    tributyl phosphate 277.29
    diacetone alcohol 536.57
    N,N-dimethylaniline 548.44
    acrylonitrile 827.82
    aniline 965.56
    1,3-propanediol 327.3
    bromobenzene 1878.84
    dibromomethane 1949.57
    1,1,2,2-tetrachloroethane 2227.75
    2-methyl-cyclohexyl acetate 617.97
    tetrabutyl urea 321.15
    diisobutyl methanol 261.24
    2-phenylethanol 748.39
    styrene 763.04
    dioctyl adipate 410.04
    dimethyl sulfate 494.01
    ethyl butyrate 707.32
    methyl lactate 293.82
    butyl lactate 462.7
    diethyl carbonate 486.81
    propanediol butyl ether 375.23
    triethyl orthoformate 553.92
    p-tert-butyltoluene 390.89
    methyl 4-tert-butylbenzoate 549.46
    morpholine 2107.43
    tert-butylamine 354.83
    n-dodecanol 136.12
    dimethoxymethane 1236.85
    ethylene carbonate 1061.79
    cyrene 487.66
    2-ethoxyethyl acetate 978.58
    2-ethylhexyl acetate 975.27
    1,2,4-trichlorobenzene 1344.21
    4-methylpyridine 2021.57
    dibutyl ether 462.79
    2,6-dimethyl-4-heptanol 261.24
    DEF 1068.63
    dimethyl isosorbide 862.89
    tetrachloroethylene 1474.57
    eugenol 501.7
    triacetin 648.61
    span 80 390.53
    1,4-butanediol 152.4
    1,1-dichloroethane 1701.63
    2-methyl-1-pentanol 407.07
    methyl formate 495.58
    2-methyl-1-butanol 531.65
    n-decane 67.11
    butyronitrile 962.21
    3,7-dimethyl-1-octanol 285.73
    1-chlorooctane 305.3
    1-chlorotetradecane 120.02
    n-nonane 65.13
    undecane 46.43
    tert-butylcyclohexane 139.63
    cyclooctane 159.0
    cyclopentanol 589.69
    tetrahydropyran 2367.1
    tert-amyl methyl ether 594.69
    2,5,8-trioxanonane 672.7
    1-hexene 437.87
    2-isopropoxyethanol 442.11
    2,2,2-trifluoroethanol 166.58
    methyl butyrate 794.16

    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