1-Methyl-4-methylidene-7-propan-2-yl-2,3,3a,5,6,7,8,8a-octahydroazulen-1-ol

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  • Identifiers

    CAS number
    6090-27-3

    Molecular formula
    C15H26O

    SMILES
    CC(C)C1CCC(=C)C2CCC(C2C1)(C)O

  • Odor profile

    Woody 71.85%
    Herbal 70.16%
    Spicy 59.2%
    Earthy 47.75%
    Fresh 45.81%
    Mint 45.53%
    Green 44.76%
    Floral 43.11%
    Balsamic 42.54%
    Camphoreous 42.15%

    Scent© AI

  • Properties

    XLogP3-AA
    3.6

    pKa est.
    9.34 (weak base)

    Molecular weight
    222.37 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    310°C

    Flash point est.
    95.88 ˚C

  • Applications

    1-Methyl-4-methylidene-7-propan-2-yl-2,3,3a,5,6,7,8,8a-octahydroazulen-1-ol (CAS 6090-27-3) is an azulane-type sesquiterpenoid alcohol used as a fragrance ingredient and odor modulator in fine fragrance, personal care, and home care, prized for woody–herbal–resinous nuances and mild fixative behavior stemming from moderate volatility; in flavor work it is occasionally dosed at trace levels to add backbone and natural complexity; in analytical laboratories it serves as a GC–MS reference/marker for essential-oil quality control and authenticity profiling; in R&D its robust carbocyclic scaffold underpins bioactivity screening (antimicrobial, antioxidant, insect-repellent) and enables derivatization (esters, ethers, carbonates, and slow‑release pro‑fragrances), as well as studies on encapsulation and polymer anchoring to extend scent longevity; from a process standpoint it can be sourced naturally or synthetically, dissolves well in ethanol and common organic carriers (e.g., dipropylene glycol), is compatible with many surfactant systems and aroma resins, yet is oxidation-sensitive and should be stored tightly sealed, protected from light and heat, with suitable antioxidants and in compliance with safety and regulatory limits for the target market and end use.

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1277.83
    methanol 871.56
    isopropanol 1768.95
    water 1.47
    ethyl acetate 946.8
    n-propanol 1288.88
    acetone 1153.55
    n-butanol 1201.82
    acetonitrile 791.49
    DMF 934.86
    toluene 805.53
    isobutanol 988.58
    1,4-dioxane 2420.73
    methyl acetate 845.14
    THF 3473.48
    2-butanone 1046.67
    n-pentanol 556.97
    sec-butanol 957.94
    n-hexane 70.92
    ethylene glycol 116.76
    NMP 433.39
    cyclohexane 226.01
    DMSO 663.79
    n-butyl acetate 899.47
    n-octanol 372.08
    chloroform 2394.13
    n-propyl acetate 528.9
    acetic acid 390.57
    dichloromethane 1726.94
    cyclohexanone 1136.18
    propylene glycol 295.81
    isopropyl acetate 740.61
    DMAc 648.2
    2-ethoxyethanol 610.05
    isopentanol 994.81
    n-heptane 108.22
    ethyl formate 598.0
    1,2-dichloroethane 850.45
    n-hexanol 926.87
    2-methoxyethanol 1242.81
    isobutyl acetate 460.05
    tetrachloromethane 418.66
    n-pentyl acetate 498.42
    transcutol 1730.4
    n-heptanol 390.47
    ethylbenzene 335.91
    MIBK 605.63
    2-propoxyethanol 1175.68
    tert-butanol 1692.28
    MTBE 1308.78
    2-butoxyethanol 627.04
    propionic acid 457.53
    o-xylene 379.94
    formic acid 92.58
    diethyl ether 1101.31
    m-xylene 465.89
    p-xylene 455.18
    chlorobenzene 671.67
    dimethyl carbonate 250.61
    n-octane 46.11
    formamide 190.86
    cyclopentanone 1345.8
    2-pentanone 854.58
    anisole 632.67
    cyclopentyl methyl ether 824.08
    gamma-butyrolactone 1180.71
    1-methoxy-2-propanol 1182.5
    pyridine 1408.13
    3-pentanone 496.56
    furfural 886.04
    n-dodecane 38.32
    diethylene glycol 585.02
    diisopropyl ether 341.45
    tert-amyl alcohol 804.53
    acetylacetone 834.69
    n-hexadecane 44.79
    acetophenone 454.27
    methyl propionate 555.65
    isopentyl acetate 851.57
    trichloroethylene 1481.93
    n-nonanol 324.9
    cyclohexanol 729.8
    benzyl alcohol 476.52
    2-ethylhexanol 454.97
    isooctanol 322.67
    dipropyl ether 642.81
    1,2-dichlorobenzene 504.02
    ethyl lactate 228.81
    propylene carbonate 688.39
    n-methylformamide 466.95
    2-pentanol 697.58
    n-pentane 116.14
    1-propoxy-2-propanol 930.3
    1-methoxy-2-propyl acetate 805.8
    2-(2-methoxypropoxy) propanol 514.39
    mesitylene 290.33
    ε-caprolactone 857.61
    p-cymene 269.42
    epichlorohydrin 1352.63
    1,1,1-trichloroethane 1047.68
    2-aminoethanol 377.52
    morpholine-4-carbaldehyde 863.65
    sulfolane 766.19
    2,2,4-trimethylpentane 58.53
    2-methyltetrahydrofuran 1640.91
    n-hexyl acetate 651.8
    isooctane 69.66
    2-(2-butoxyethoxy)ethanol 747.69
    sec-butyl acetate 402.59
    tert-butyl acetate 737.38
    decalin 78.67
    glycerin 281.39
    diglyme 1316.28
    acrylic acid 285.9
    isopropyl myristate 289.91
    n-butyric acid 960.9
    acetyl acetate 561.5
    di(2-ethylhexyl) phthalate 256.1
    ethyl propionate 421.61
    nitromethane 673.04
    1,2-diethoxyethane 920.69
    benzonitrile 722.12
    trioctyl phosphate 198.05
    1-bromopropane 797.09
    gamma-valerolactone 1482.75
    n-decanol 239.37
    triethyl phosphate 211.1
    4-methyl-2-pentanol 458.85
    propionitrile 908.27
    vinylene carbonate 685.93
    1,1,2-trichlorotrifluoroethane 614.53
    DMS 372.77
    cumene 227.73
    2-octanol 277.03
    2-hexanone 491.46
    octyl acetate 332.92
    limonene 338.25
    1,2-dimethoxyethane 1303.02
    ethyl orthosilicate 218.96
    tributyl phosphate 225.8
    diacetone alcohol 639.76
    N,N-dimethylaniline 356.54
    acrylonitrile 767.32
    aniline 707.65
    1,3-propanediol 783.93
    bromobenzene 733.35
    dibromomethane 1160.06
    1,1,2,2-tetrachloroethane 1160.46
    2-methyl-cyclohexyl acetate 424.22
    tetrabutyl urea 271.0
    diisobutyl methanol 325.0
    2-phenylethanol 579.49
    styrene 400.89
    dioctyl adipate 340.15
    dimethyl sulfate 263.25
    ethyl butyrate 572.33
    methyl lactate 282.74
    butyl lactate 373.7
    diethyl carbonate 355.78
    propanediol butyl ether 546.4
    triethyl orthoformate 393.13
    p-tert-butyltoluene 291.95
    methyl 4-tert-butylbenzoate 434.3
    morpholine 2343.4
    tert-butylamine 1125.68
    n-dodecanol 184.77
    dimethoxymethane 933.65
    ethylene carbonate 645.81
    cyrene 363.37
    2-ethoxyethyl acetate 629.21
    2-ethylhexyl acetate 596.96
    1,2,4-trichlorobenzene 556.69
    4-methylpyridine 1288.73
    dibutyl ether 479.45
    2,6-dimethyl-4-heptanol 325.0
    DEF 567.08
    dimethyl isosorbide 783.65
    tetrachloroethylene 671.15
    eugenol 407.08
    triacetin 478.78
    span 80 496.52
    1,4-butanediol 213.37
    1,1-dichloroethane 1197.39
    2-methyl-1-pentanol 435.17
    methyl formate 351.61
    2-methyl-1-butanol 720.76
    n-decane 66.8
    butyronitrile 1116.6
    3,7-dimethyl-1-octanol 397.09
    1-chlorooctane 227.0
    1-chlorotetradecane 96.49
    n-nonane 61.61
    undecane 48.78
    tert-butylcyclohexane 79.03
    cyclooctane 71.29
    cyclopentanol 794.47
    tetrahydropyran 2306.38
    tert-amyl methyl ether 544.51
    2,5,8-trioxanonane 824.56
    1-hexene 292.15
    2-isopropoxyethanol 460.74
    2,2,2-trifluoroethanol 146.0
    methyl butyrate 574.14

    Scent© AI

1 3

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
Spikenard 2 8022-22-8 Nardostachys jatamansi (Roxb.) DC., fam. Valerianaceae 0.01%