9-Eicosyne

Overview IFRA Request a quote

  • Identifiers

    CAS number
    71899-38-2

    Molecular formula
    C20H38

    SMILES
    CCCCCCCCCCC#CCCCCCCCC

    Safety labels

  • Odor profile

    Fragrance
    Waxy 58.34%
    Fatty 39.62%
    Oily 36.1%
    Green 33.69%
    Fresh 31.61%
    Fruity 29.82%
    Citrus 27.73%
    Meaty 26.79%
    Metallic 24.45%
    Gassy 22.47%

     

    Flavor
    Alkane 28.72%
    Bland 26.02%
    Waxy 24.96%
    Delicate 20.35%
    Slightly waxy 20.15%
    Faint 20.04%
    Mild 19.26%
    Diterpene 18.83%
    Oriental 18.78%
    Low 18.66%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    9.9

    pKa est.
    7.55 (neutral)

    Molecular weight
    278.5 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    342°C

    Flash point

    • 161.23 ˚C est.

  • Synonyms

    • 9-Eicosyne
    • icos-9-yne
    • 71899-38-2
    • DTXSID40339568
    • RefChem:1074967
    • DTXCID80290649
    • 9-Icosyne
    • 9-Icosyne #
    • SCHEMBL5985637
    • SCHEMBL7705498
    • SCHEMBL28437823
    • ARULVMGJDAAVBD-UHFFFAOYSA-N
    • NS00096046
    • 71899-38-2

  • Applications

    9-Eicosyne (CAS 71899-38-2) is primarily used as an intermediate in organic synthesis and as a building block for alkyne-containing specialty chemicals. In practice, it is often evaluated as a precursor for polymers and plastics; it can be used in coatings and inks as a processing intermediate and precursor for niche formulations; in electronics as a precursor to functional alkyne-containing materials; and it may serve as a base oil or additive in niche industrial formulations. It may also function as a starting material for the synthesis of other high-carbon alkyne compounds, depending on local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 359.49
    methanol 211.66
    isopropanol 544.46
    water 0.01
    ethyl acetate 3162.46
    n-propanol 570.51
    acetone 2303.92
    n-butanol 830.63
    acetonitrile 668.66
    DMF 1395.81
    toluene 1320.92
    isobutanol 623.92
    1,4-dioxane 3079.57
    methyl acetate 1605.29
    THF 6194.71
    2-butanone 2267.99
    n-pentanol 588.76
    sec-butanol 710.38
    n-hexane 1552.52
    ethylene glycol 20.65
    NMP 2154.21
    cyclohexane 5458.19
    DMSO 2001.07
    n-butyl acetate 4870.28
    n-octanol 668.61
    chloroform 4585.31
    n-propyl acetate 3052.89
    acetic acid 435.81
    dichloromethane 4814.51
    cyclohexanone 5847.03
    propylene glycol 63.31
    isopropyl acetate 2781.3
    DMAc 1585.44
    2-ethoxyethanol 706.12
    isopentanol 1051.44
    n-heptane 3106.25
    ethyl formate 1033.77
    1,2-dichloroethane 4126.29
    n-hexanol 1013.19
    2-methoxyethanol 822.84
    isobutyl acetate 1998.78
    tetrachloromethane 1690.61
    n-pentyl acetate 3077.08
    transcutol 3913.36
    n-heptanol 664.23
    ethylbenzene 871.94
    MIBK 2242.68
    2-propoxyethanol 1205.4
    tert-butanol 1100.62
    MTBE 2665.67
    2-butoxyethanol 1012.51
    propionic acid 579.33
    o-xylene 983.61
    formic acid 34.72
    diethyl ether 3504.22
    m-xylene 906.04
    p-xylene 1198.32
    chlorobenzene 1618.84
    dimethyl carbonate 514.83
    n-octane 698.14
    formamide 92.9
    cyclopentanone 4711.86
    2-pentanone 3002.12
    anisole 1235.63
    cyclopentyl methyl ether 4521.27
    gamma-butyrolactone 3619.21
    1-methoxy-2-propanol 948.84
    pyridine 2429.87
    3-pentanone 2599.21
    furfural 1981.96
    n-dodecane 214.42
    diethylene glycol 309.26
    diisopropyl ether 1882.61
    tert-amyl alcohol 1100.71
    acetylacetone 2790.91
    n-hexadecane 270.42
    acetophenone 1328.5
    methyl propionate 1781.64
    isopentyl acetate 3880.81
    trichloroethylene 5376.6
    n-nonanol 676.38
    cyclohexanol 1879.09
    benzyl alcohol 542.35
    2-ethylhexanol 1499.37
    isooctanol 752.39
    dipropyl ether 6720.57
    1,2-dichlorobenzene 1768.78
    ethyl lactate 606.17
    propylene carbonate 2111.53
    n-methylformamide 405.96
    2-pentanol 956.25
    n-pentane 1057.85
    1-propoxy-2-propanol 1912.7
    1-methoxy-2-propyl acetate 2624.63
    2-(2-methoxypropoxy) propanol 748.0
    mesitylene 820.25
    ε-caprolactone 3965.34
    p-cymene 1073.51
    epichlorohydrin 3597.67
    1,1,1-trichloroethane 4708.8
    2-aminoethanol 87.93
    morpholine-4-carbaldehyde 1837.47
    sulfolane 4166.08
    2,2,4-trimethylpentane 447.67
    2-methyltetrahydrofuran 5086.81
    n-hexyl acetate 2659.71
    isooctane 375.93
    2-(2-butoxyethoxy)ethanol 1162.99
    sec-butyl acetate 2345.75
    tert-butyl acetate 3382.02
    decalin 955.37
    glycerin 90.45
    diglyme 3301.52
    acrylic acid 329.36
    isopropyl myristate 1078.25
    n-butyric acid 1699.88
    acetyl acetate 1786.21
    di(2-ethylhexyl) phthalate 474.28
    ethyl propionate 2668.81
    nitromethane 1145.18
    1,2-diethoxyethane 4223.79
    benzonitrile 989.63
    trioctyl phosphate 484.12
    1-bromopropane 3617.48
    gamma-valerolactone 3950.49
    n-decanol 469.71
    triethyl phosphate 1363.95
    4-methyl-2-pentanol 687.53
    propionitrile 964.22
    vinylene carbonate 1471.94
    1,1,2-trichlorotrifluoroethane 1687.68
    DMS 1186.37
    cumene 644.95
    2-octanol 645.32
    2-hexanone 2475.42
    octyl acetate 1068.09
    limonene 2296.23
    1,2-dimethoxyethane 2964.45
    ethyl orthosilicate 1518.81
    tributyl phosphate 709.43
    diacetone alcohol 1756.03
    N,N-dimethylaniline 922.64
    acrylonitrile 700.05
    aniline 874.62
    1,3-propanediol 249.09
    bromobenzene 2183.23
    dibromomethane 3775.15
    1,1,2,2-tetrachloroethane 5299.14
    2-methyl-cyclohexyl acetate 2135.1
    tetrabutyl urea 957.96
    diisobutyl methanol 1390.33
    2-phenylethanol 653.53
    styrene 1011.53
    dioctyl adipate 1239.99
    dimethyl sulfate 838.47
    ethyl butyrate 4781.79
    methyl lactate 413.56
    butyl lactate 1252.6
    diethyl carbonate 2138.44
    propanediol butyl ether 570.13
    triethyl orthoformate 3263.16
    p-tert-butyltoluene 1020.96
    methyl 4-tert-butylbenzoate 1206.89
    morpholine 3288.79
    tert-butylamine 1033.89
    n-dodecanol 368.23
    dimethoxymethane 1602.54
    ethylene carbonate 1750.6
    cyrene 671.36
    2-ethoxyethyl acetate 2497.9
    2-ethylhexyl acetate 3573.34
    1,2,4-trichlorobenzene 1720.73
    4-methylpyridine 2279.02
    dibutyl ether 3898.89
    2,6-dimethyl-4-heptanol 1390.33
    DEF 3042.46
    dimethyl isosorbide 1804.38
    tetrachloroethylene 3470.51
    eugenol 737.29
    triacetin 1802.37
    span 80 851.31
    1,4-butanediol 101.84
    1,1-dichloroethane 3496.38
    2-methyl-1-pentanol 719.46
    methyl formate 373.96
    2-methyl-1-butanol 851.71
    n-decane 561.41
    butyronitrile 1434.46
    3,7-dimethyl-1-octanol 943.06
    1-chlorooctane 1383.63
    1-chlorotetradecane 449.79
    n-nonane 672.61
    undecane 318.49
    tert-butylcyclohexane 730.87
    cyclooctane 1577.42
    cyclopentanol 1410.56
    tetrahydropyran 6397.92
    tert-amyl methyl ether 2188.79
    2,5,8-trioxanonane 1586.52
    1-hexene 2028.64
    2-isopropoxyethanol 725.25
    2,2,2-trifluoroethanol 166.4
    methyl butyrate 3421.65

    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