(+)-beta-Costol

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  • Identifiers

    CAS number
    515-20-8

    Molecular formula
    C15H24O

    SMILES
    C[C@]12CCCC(=C)[C@@H]1C[C@@H](CC2)C(=C)CO

  • Odor profile

    Woody 70.8%
    Sweet 40.78%
    Green 38.77%
    Fruity 36.28%
    Amber 35.94%
    Fresh 35.41%
    Dry 33.77%
    Floral 33.32%
    Cedar 33.09%
    Herbal 32.52%

    Scent© AI

  • Properties

    XLogP3-AA
    4.2

    pKa est.
    9.43 (weak base)

    Molecular weight
    220.35 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    336°C

    Flash point est.
    133.31 ˚C

  • Synonyms

    • Costol
    • 515-20-8
    • (+)-.beta.-Costol
    • 2-[(2R,4aR,8aS)-4a-methyl-8-methylidene-1,2,3,4,5,6,7,8a-octahydronaphthalen-2-yl]prop-2-en-1-ol
    • b-Costol
    • (+)-beta-Costol
    • 5H9X7D8QU4
    • SCHEMBL14189192
    • (2R,4aR,8aS)-Decahydro-4a-methyl-beta,8-bis(methylene)-2-naphthaleneethanol
    • 2-Naphthaleneethanol, decahydro-4a-methyl-beta,8-bis(methylene)-, (2R,4aR,8aS)-
    • Decahydro-4a-methyl-beta,8-bis(methylene)-2-naphthaleneethanol, (2R,4aR,8aS)-

  • Applications

    (+)-beta-Costol (CAS 515-20-8) is a natural sesquiterpene alcohol from costus root oil used mainly in fragrance R&D to impart woody–warm–balsamic nuances and reinforce oriental/chypre/tobacco accords at trace levels; as an analytical reference for GC-MS/chiral GC to build spectral libraries and authenticate costus-derived botanicals/oils; for structure–odor relationship studies and enantiomer resolution; and as a scaffold/intermediate to semi-synthesize sesquiterpene derivatives in natural product chemistry, while any commercial use in foods and cosmetics is subject to strict safety and regulatory constraints (e.g., IFRA/local rules) and it has no approved therapeutic indications.

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 3463.74
    methanol 3103.29
    isopropanol 3301.65
    water 0.54
    ethyl acetate 4299.6
    n-propanol 3678.99
    acetone 3032.48
    n-butanol 3314.58
    acetonitrile 2229.55
    DMF 2748.25
    toluene 2022.68
    isobutanol 1783.04
    1,4-dioxane 5652.14
    methyl acetate 2157.79
    THF 7785.33
    2-butanone 2811.84
    n-pentanol 747.09
    sec-butanol 1431.41
    n-hexane 46.43
    ethylene glycol 135.0
    NMP 572.27
    cyclohexane 201.04
    DMSO 1240.93
    n-butyl acetate 2047.77
    n-octanol 211.1
    chloroform 3298.73
    n-propyl acetate 1191.64
    acetic acid 792.11
    dichloromethane 2584.73
    cyclohexanone 2265.67
    propylene glycol 279.5
    isopropyl acetate 2492.87
    DMAc 982.67
    2-ethoxyethanol 1505.45
    isopentanol 2058.99
    n-heptane 46.66
    ethyl formate 1628.8
    1,2-dichloroethane 2028.48
    n-hexanol 1302.12
    2-methoxyethanol 4610.92
    isobutyl acetate 644.17
    tetrachloromethane 496.19
    n-pentyl acetate 680.67
    transcutol 6321.09
    n-heptanol 345.25
    ethylbenzene 352.32
    MIBK 1341.2
    2-propoxyethanol 2809.32
    tert-butanol 3046.13
    MTBE 3825.58
    2-butoxyethanol 936.51
    propionic acid 935.12
    o-xylene 573.58
    formic acid 270.25
    diethyl ether 5426.0
    m-xylene 981.84
    p-xylene 363.82
    chlorobenzene 1184.24
    dimethyl carbonate 660.1
    n-octane 11.85
    formamide 810.39
    cyclopentanone 2575.36
    2-pentanone 2979.51
    anisole 972.74
    cyclopentyl methyl ether 2470.38
    gamma-butyrolactone 2433.26
    1-methoxy-2-propanol 3289.29
    pyridine 3570.83
    3-pentanone 1520.99
    furfural 1640.9
    n-dodecane 6.33
    diethylene glycol 1082.7
    diisopropyl ether 820.78
    tert-amyl alcohol 1157.82
    acetylacetone 2029.95
    n-hexadecane 8.06
    acetophenone 536.29
    methyl propionate 2255.65
    isopentyl acetate 1616.05
    trichloroethylene 3136.61
    n-nonanol 186.52
    cyclohexanol 1244.65
    benzyl alcohol 592.02
    2-ethylhexanol 494.34
    isooctanol 267.6
    dipropyl ether 1236.31
    1,2-dichlorobenzene 752.47
    ethyl lactate 309.57
    propylene carbonate 1032.37
    n-methylformamide 2318.58
    2-pentanol 1510.67
    n-pentane 117.0
    1-propoxy-2-propanol 1951.17
    1-methoxy-2-propyl acetate 2236.23
    2-(2-methoxypropoxy) propanol 590.75
    mesitylene 472.19
    ε-caprolactone 1660.92
    p-cymene 216.87
    epichlorohydrin 3626.69
    1,1,1-trichloroethane 1541.29
    2-aminoethanol 690.05
    morpholine-4-carbaldehyde 1667.61
    sulfolane 1080.16
    2,2,4-trimethylpentane 39.78
    2-methyltetrahydrofuran 3422.58
    n-hexyl acetate 693.66
    isooctane 59.94
    2-(2-butoxyethoxy)ethanol 1200.9
    sec-butyl acetate 795.26
    tert-butyl acetate 2107.7
    decalin 42.89
    glycerin 324.48
    diglyme 2764.17
    acrylic acid 498.54
    isopropyl myristate 187.4
    n-butyric acid 2643.29
    acetyl acetate 1131.82
    di(2-ethylhexyl) phthalate 174.05
    ethyl propionate 1022.08
    nitromethane 1918.76
    1,2-diethoxyethane 2850.29
    benzonitrile 943.18
    trioctyl phosphate 114.34
    1-bromopropane 1239.73
    gamma-valerolactone 3104.19
    n-decanol 121.18
    triethyl phosphate 271.08
    4-methyl-2-pentanol 702.21
    propionitrile 2570.17
    vinylene carbonate 1053.56
    1,1,2-trichlorotrifluoroethane 1063.66
    DMS 526.53
    cumene 181.32
    2-octanol 166.23
    2-hexanone 894.6
    octyl acetate 225.68
    limonene 299.16
    1,2-dimethoxyethane 2972.9
    ethyl orthosilicate 323.84
    tributyl phosphate 167.65
    diacetone alcohol 1370.76
    N,N-dimethylaniline 420.0
    acrylonitrile 2203.26
    aniline 1997.49
    1,3-propanediol 2046.51
    bromobenzene 1155.14
    dibromomethane 1661.04
    1,1,2,2-tetrachloroethane 2047.58
    2-methyl-cyclohexyl acetate 439.67
    tetrabutyl urea 175.46
    diisobutyl methanol 343.32
    2-phenylethanol 812.71
    styrene 487.82
    dioctyl adipate 246.0
    dimethyl sulfate 468.64
    ethyl butyrate 1173.62
    methyl lactate 514.32
    butyl lactate 452.93
    diethyl carbonate 608.02
    propanediol butyl ether 537.77
    triethyl orthoformate 785.32
    p-tert-butyltoluene 246.52
    methyl 4-tert-butylbenzoate 442.63
    morpholine 6903.21
    tert-butylamine 1842.92
    n-dodecanol 79.18
    dimethoxymethane 4141.9
    ethylene carbonate 1076.91
    cyrene 324.89
    2-ethoxyethyl acetate 1231.71
    2-ethylhexyl acetate 1014.48
    1,2,4-trichlorobenzene 809.29
    4-methylpyridine 2990.93
    dibutyl ether 501.23
    2,6-dimethyl-4-heptanol 343.32
    DEF 1950.51
    dimethyl isosorbide 1021.17
    tetrachloroethylene 1344.35
    eugenol 396.23
    triacetin 494.16
    span 80 400.97
    1,4-butanediol 247.42
    1,1-dichloroethane 2278.3
    2-methyl-1-pentanol 498.17
    methyl formate 1265.35
    2-methyl-1-butanol 1370.2
    n-decane 15.49
    butyronitrile 3063.25
    3,7-dimethyl-1-octanol 307.67
    1-chlorooctane 117.7
    1-chlorotetradecane 28.63
    n-nonane 14.2
    undecane 9.32
    tert-butylcyclohexane 45.43
    cyclooctane 57.18
    cyclopentanol 1058.94
    tetrahydropyran 6201.73
    tert-amyl methyl ether 1289.26
    2,5,8-trioxanonane 1192.61
    1-hexene 277.8
    2-isopropoxyethanol 817.32
    2,2,2-trifluoroethanol 218.41
    methyl butyrate 1218.05

    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

Botanical

Name CAS Botanical Proportion
Betel leaf Kapoori (India) 2 Piper betle L. var. Kapoori, fam. Piperaceae 0.36%
Costus 8023-88-9 Saussurea lappa Clarke, fam. Zingiberaceae 5.0%