18-Hydroxy-9-octadecenoic acid

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  • Identifiers

    CAS number
    3329-38-2

    Molecular formula
    C18H34O3

    SMILES
    C(CCCCO)CCCC=CCCCCCCCC(=O)O

    Safety labels

  • Odor profile

    Fragrance
    Fatty 62.7%
    Waxy 59.8%
    Oily 40.95%
    Sweet 29.56%
    Odorless 29.09%
    Citrus 26.62%
    Soapy 22.86%
    Creamy 22.44%
    Fresh 22.32%
    Milky 22.18%

     

    Flavor
    Waxy 58.78%
    Fatty 56.62%
    Soapy 33.4%
    Fat 31.91%
    Oily 30.98%
    Mild 30.88%
    Faint 27.33%
    Creamy 26.37%
    Coconut 26.2%
    Floral 25.23%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    5.7

    pKa est.
    6.76 (neutral)

    Molecular weight
    298.5 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    383°C

    Flash point

    • 217.1 ˚C est.

  • Synonyms

    • 18-Hydroxy-9-octadecenoic acid
    • 3329-38-2
    • SCHEMBL561759
    • DTXSID201305398
    • FH178445
    • DS-021357
    • 3329-38-2

  • Applications

    18-Hydroxy-9-octadecenoic acid (CAS 3329-38-2) is an omega-hydroxy fatty acid that serves as a biobased platform chemical for polymer synthesis. It is commonly evaluated as a monomer or functional building block in polyurethanes (via its terminal hydroxyl) and polyesters (via its carboxyl group), enabling the production of specialty coatings, adhesives, and related resin systems. It can also be converted to fatty ester derivatives for lubricants, plasticizers, and wax esters, broadening options for sustainable lubricant and additive formulations. In cosmetics and personal care, it may be used as an intermediate for emollient esters or other functional derivatives. As a naturally derived, dual-function molecule, it is generally used within the constraints of local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 30.61
    methanol 41.02
    isopropanol 27.22
    water 0.02
    ethyl acetate 19.48
    n-propanol 24.91
    acetone 25.6
    n-butanol 28.87
    acetonitrile 5.26
    DMF 71.15
    toluene 9.75
    isobutanol 22.08
    1,4-dioxane 51.83
    methyl acetate 14.24
    THF 221.97
    2-butanone 27.19
    n-pentanol 29.16
    sec-butanol 24.32
    n-hexane 5.07
    ethylene glycol 3.02
    NMP 135.55
    cyclohexane 10.62
    DMSO 230.18
    n-butyl acetate 42.66
    n-octanol 25.49
    chloroform 48.45
    n-propyl acetate 44.92
    acetic acid 21.32
    dichloromethane 44.94
    cyclohexanone 100.42
    propylene glycol 11.63
    isopropyl acetate 29.24
    DMAc 134.58
    2-ethoxyethanol 74.4
    isopentanol 38.44
    n-heptane 4.76
    ethyl formate 14.29
    1,2-dichloroethane 43.17
    n-hexanol 28.14
    2-methoxyethanol 80.24
    isobutyl acetate 35.16
    tetrachloromethane 12.04
    n-pentyl acetate 54.76
    transcutol 376.45
    n-heptanol 25.26
    ethylbenzene 13.07
    MIBK 48.48
    2-propoxyethanol 76.02
    tert-butanol 51.64
    MTBE 40.08
    2-butoxyethanol 73.93
    propionic acid 18.95
    o-xylene 13.84
    formic acid 8.17
    diethyl ether 21.67
    m-xylene 13.25
    p-xylene 15.55
    chlorobenzene 14.67
    dimethyl carbonate 9.62
    n-octane 2.7
    formamide 13.83
    cyclopentanone 111.66
    2-pentanone 37.9
    anisole 29.68
    cyclopentyl methyl ether 77.21
    gamma-butyrolactone 89.25
    1-methoxy-2-propanol 88.39
    pyridine 32.07
    3-pentanone 24.56
    furfural 72.21
    n-dodecane 1.88
    diethylene glycol 39.46
    diisopropyl ether 14.94
    tert-amyl alcohol 45.5
    acetylacetone 52.5
    n-hexadecane 2.18
    acetophenone 43.01
    methyl propionate 20.31
    isopentyl acetate 52.45
    trichloroethylene 66.75
    n-nonanol 26.56
    cyclohexanol 44.74
    benzyl alcohol 25.68
    2-ethylhexanol 26.27
    isooctanol 27.79
    dipropyl ether 36.3
    1,2-dichlorobenzene 21.75
    ethyl lactate 28.64
    propylene carbonate 48.98
    n-methylformamide 19.77
    2-pentanol 22.56
    n-pentane 2.75
    1-propoxy-2-propanol 77.49
    1-methoxy-2-propyl acetate 61.96
    2-(2-methoxypropoxy) propanol 74.18
    mesitylene 13.07
    ε-caprolactone 87.46
    p-cymene 13.55
    epichlorohydrin 99.8
    1,1,1-trichloroethane 35.04
    2-aminoethanol 14.24
    morpholine-4-carbaldehyde 107.36
    sulfolane 234.11
    2,2,4-trimethylpentane 4.63
    2-methyltetrahydrofuran 94.96
    n-hexyl acetate 62.93
    isooctane 3.37
    2-(2-butoxyethoxy)ethanol 111.78
    sec-butyl acetate 36.48
    tert-butyl acetate 60.39
    decalin 7.86
    glycerin 23.03
    diglyme 207.05
    acrylic acid 12.47
    isopropyl myristate 24.91
    n-butyric acid 45.32
    acetyl acetate 16.27
    di(2-ethylhexyl) phthalate 24.29
    ethyl propionate 31.24
    nitromethane 32.67
    1,2-diethoxyethane 84.94
    benzonitrile 19.84
    trioctyl phosphate 18.81
    1-bromopropane 23.3
    gamma-valerolactone 158.31
    n-decanol 17.54
    triethyl phosphate 29.18
    4-methyl-2-pentanol 23.41
    propionitrile 8.4
    vinylene carbonate 31.35
    1,1,2-trichlorotrifluoroethane 94.05
    DMS 28.18
    cumene 13.45
    2-octanol 19.3
    2-hexanone 49.54
    octyl acetate 28.84
    limonene 22.79
    1,2-dimethoxyethane 124.79
    ethyl orthosilicate 33.49
    tributyl phosphate 24.3
    diacetone alcohol 88.7
    N,N-dimethylaniline 33.14
    acrylonitrile 9.11
    aniline 15.78
    1,3-propanediol 31.15
    bromobenzene 15.03
    dibromomethane 31.42
    1,1,2,2-tetrachloroethane 86.07
    2-methyl-cyclohexyl acetate 53.72
    tetrabutyl urea 39.04
    diisobutyl methanol 22.62
    2-phenylethanol 27.57
    styrene 12.44
    dioctyl adipate 45.21
    dimethyl sulfate 31.28
    ethyl butyrate 41.31
    methyl lactate 24.61
    butyl lactate 53.02
    diethyl carbonate 22.88
    propanediol butyl ether 71.44
    triethyl orthoformate 45.58
    p-tert-butyltoluene 14.29
    methyl 4-tert-butylbenzoate 62.99
    morpholine 94.39
    tert-butylamine 29.84
    n-dodecanol 12.3
    dimethoxymethane 53.25
    ethylene carbonate 28.74
    cyrene 75.29
    2-ethoxyethyl acetate 65.69
    2-ethylhexyl acetate 40.65
    1,2,4-trichlorobenzene 28.02
    4-methylpyridine 30.73
    dibutyl ether 42.51
    2,6-dimethyl-4-heptanol 22.62
    DEF 56.65
    dimethyl isosorbide 146.75
    tetrachloroethylene 54.83
    eugenol 55.83
    triacetin 74.04
    span 80 67.69
    1,4-butanediol 12.51
    1,1-dichloroethane 25.51
    2-methyl-1-pentanol 35.73
    methyl formate 11.29
    2-methyl-1-butanol 30.22
    n-decane 4.15
    butyronitrile 14.86
    3,7-dimethyl-1-octanol 30.3
    1-chlorooctane 17.96
    1-chlorotetradecane 5.99
    n-nonane 3.79
    undecane 2.6
    tert-butylcyclohexane 6.85
    cyclooctane 3.96
    cyclopentanol 45.37
    tetrahydropyran 74.23
    tert-amyl methyl ether 39.84
    2,5,8-trioxanonane 136.21
    1-hexene 14.12
    2-isopropoxyethanol 61.74
    2,2,2-trifluoroethanol 8.87
    methyl butyrate 51.14

    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