Copalol

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  • Identifiers

    CAS number
    21738-29-4

    Molecular formula
    C20H34O

    SMILES
    C/C(=C\CO)/CC[C@@H]1C(=C)CC[C@H]2[C@@]1(CCCC2(C)C)C

    Safety labels

  • Odor profile

    Fragrance
    Woody 87.15%
    Amber 55.63%
    Sandalwood 48.5%
    Dry 45.91%
    Sweet 42.88%
    Powdery 40.53%
    Musk 40.4%
    Cedar 39.58%
    Balsamic 37.88%
    Orris 37.15%

     

    Flavor
    Woody 66.51%
    Sweet 50.55%
    Floral 48.15%
    Wood 40.48%
    Balsam 35.97%
    Amber 32.03%
    Waxy 31.14%
    Fresh 30.57%
    Dry 28.17%
    Citrus 28.04%

     

    Odor impact est.
    Medium

  • Properties

    XLogP3-AA
    6.1

    pKa est.
    8.77 (weak base)

    Molecular weight
    290.5 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    398°C

    Flash point

    • 164.89 ˚C est.

  • Synonyms

    • Copalol
    • RefChem:918999
    • (E)-5-((1R,4aR,8aS)-5,5,8a-trimethyl-2-methylidene-3,4,4a,6,7,8-hexahydro-1H-naphthalen-1-yl)-3-methylpent-2-en-1-ol
    • 21738-29-4
    • (-)-copalol
    • SCHEMBL29543181
    • (E)-3-Methyl-5-((1R,4aR,8aR)-5,5,8a-trimethyl-2-methylenedecahydronaphthalen-1-yl)pent-2-en-1-ol
    • 21738-29-4

  • Applications

    Copalol (CAS 21738-29-4) is a resin-derived terpene alcohol used mainly as a fragrance ingredient and fixative in perfumery. It may contribute a woody, balsamic character to formulations and help stabilize more volatile aroma components. It is commonly evaluated for use in cosmetics and personal care as a scent component, and in household products such as air fresheners and cleaners as a fragrance additive. In coatings, inks, and other industrial formulations, Copalol may serve as a specialty aroma component or resin-modifying additive within fragrance-containing products. Its use is typically subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1003.15
    methanol 490.86
    isopropanol 1011.52
    water 0.09
    ethyl acetate 609.21
    n-propanol 1010.43
    acetone 721.24
    n-butanol 910.03
    acetonitrile 252.18
    DMF 689.36
    toluene 716.65
    isobutanol 620.18
    1,4-dioxane 1622.39
    methyl acetate 321.51
    THF 3444.84
    2-butanone 612.52
    n-pentanol 329.41
    sec-butanol 510.35
    n-hexane 35.62
    ethylene glycol 13.87
    NMP 298.06
    cyclohexane 116.92
    DMSO 207.6
    n-butyl acetate 547.82
    n-octanol 142.4
    chloroform 780.27
    n-propyl acetate 274.83
    acetic acid 155.85
    dichloromethane 611.1
    cyclohexanone 768.24
    propylene glycol 48.56
    isopropyl acetate 512.29
    DMAc 337.77
    2-ethoxyethanol 386.42
    isopentanol 625.43
    n-heptane 52.92
    ethyl formate 209.97
    1,2-dichloroethane 441.03
    n-hexanol 618.12
    2-methoxyethanol 808.98
    isobutyl acetate 239.24
    tetrachloromethane 138.59
    n-pentyl acetate 315.89
    transcutol 1934.64
    n-heptanol 216.23
    ethylbenzene 150.38
    MIBK 473.16
    2-propoxyethanol 959.35
    tert-butanol 879.53
    MTBE 1040.36
    2-butoxyethanol 422.56
    propionic acid 139.51
    o-xylene 204.15
    formic acid 29.51
    diethyl ether 1339.96
    m-xylene 392.14
    p-xylene 166.38
    chlorobenzene 336.75
    dimethyl carbonate 123.42
    n-octane 13.67
    formamide 61.87
    cyclopentanone 822.92
    2-pentanone 729.63
    anisole 309.01
    cyclopentyl methyl ether 985.87
    gamma-butyrolactone 610.29
    1-methoxy-2-propanol 792.21
    pyridine 772.99
    3-pentanone 358.16
    furfural 399.18
    n-dodecane 7.03
    diethylene glycol 264.27
    diisopropyl ether 298.35
    tert-amyl alcohol 403.83
    acetylacetone 487.9
    n-hexadecane 8.66
    acetophenone 192.42
    methyl propionate 370.92
    isopentyl acetate 545.52
    trichloroethylene 662.03
    n-nonanol 132.34
    cyclohexanol 464.13
    benzyl alcohol 190.96
    2-ethylhexanol 261.49
    isooctanol 181.01
    dipropyl ether 590.55
    1,2-dichlorobenzene 230.63
    ethyl lactate 94.42
    propylene carbonate 278.2
    n-methylformamide 224.23
    2-pentanol 471.15
    n-pentane 71.47
    1-propoxy-2-propanol 769.02
    1-methoxy-2-propyl acetate 635.94
    2-(2-methoxypropoxy) propanol 293.15
    mesitylene 204.51
    ε-caprolactone 539.0
    p-cymene 126.22
    epichlorohydrin 945.74
    1,1,1-trichloroethane 397.5
    2-aminoethanol 107.31
    morpholine-4-carbaldehyde 569.52
    sulfolane 349.96
    2,2,4-trimethylpentane 28.18
    2-methyltetrahydrofuran 1410.95
    n-hexyl acetate 345.54
    isooctane 37.63
    2-(2-butoxyethoxy)ethanol 506.33
    sec-butyl acetate 234.39
    tert-butyl acetate 551.04
    decalin 30.42
    glycerin 63.13
    diglyme 976.31
    acrylic acid 72.18
    isopropyl myristate 122.33
    n-butyric acid 444.79
    acetyl acetate 243.0
    di(2-ethylhexyl) phthalate 112.68
    ethyl propionate 227.4
    nitromethane 234.4
    1,2-diethoxyethane 835.6
    benzonitrile 251.91
    trioctyl phosphate 79.95
    1-bromopropane 426.47
    gamma-valerolactone 1022.05
    n-decanol 89.48
    triethyl phosphate 114.69
    4-methyl-2-pentanol 278.04
    propionitrile 394.44
    vinylene carbonate 245.1
    1,1,2-trichlorotrifluoroethane 267.56
    DMS 183.74
    cumene 97.31
    2-octanol 117.37
    2-hexanone 288.49
    octyl acetate 148.95
    limonene 185.85
    1,2-dimethoxyethane 858.35
    ethyl orthosilicate 136.43
    tributyl phosphate 91.23
    diacetone alcohol 436.22
    N,N-dimethylaniline 183.85
    acrylonitrile 260.4
    aniline 456.5
    1,3-propanediol 350.95
    bromobenzene 376.12
    dibromomethane 436.18
    1,1,2,2-tetrachloroethane 500.88
    2-methyl-cyclohexyl acetate 238.79
    tetrabutyl urea 117.39
    diisobutyl methanol 173.73
    2-phenylethanol 316.15
    styrene 177.23
    dioctyl adipate 156.65
    dimethyl sulfate 110.46
    ethyl butyrate 342.42
    methyl lactate 114.64
    butyl lactate 202.49
    diethyl carbonate 169.1
    propanediol butyl ether 271.55
    triethyl orthoformate 280.13
    p-tert-butyltoluene 141.38
    methyl 4-tert-butylbenzoate 251.86
    morpholine 2082.42
    tert-butylamine 657.68
    n-dodecanol 62.14
    dimethoxymethane 1079.18
    ethylene carbonate 250.53
    cyrene 186.33
    2-ethoxyethyl acetate 467.78
    2-ethylhexyl acetate 382.29
    1,2,4-trichlorobenzene 256.62
    4-methylpyridine 782.52
    dibutyl ether 263.47
    2,6-dimethyl-4-heptanol 173.73
    DEF 459.12
    dimethyl isosorbide 511.74
    tetrachloroethylene 298.94
    eugenol 208.97
    triacetin 251.11
    span 80 246.68
    1,4-butanediol 62.16
    1,1-dichloroethane 491.94
    2-methyl-1-pentanol 239.93
    methyl formate 134.73
    2-methyl-1-butanol 471.73
    n-decane 17.65
    butyronitrile 577.48
    3,7-dimethyl-1-octanol 170.76
    1-chlorooctane 96.78
    1-chlorotetradecane 26.79
    n-nonane 16.62
    undecane 10.47
    tert-butylcyclohexane 31.31
    cyclooctane 34.03
    cyclopentanol 425.43
    tetrahydropyran 2240.1
    tert-amyl methyl ether 426.88
    2,5,8-trioxanonane 498.22
    1-hexene 163.17
    2-isopropoxyethanol 289.89
    2,2,2-trifluoroethanol 37.55
    methyl butyrate 274.86

    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