Undecanal, 2-ethylidene-

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  • Identifiers

    CAS number
    6720-16-7

    Molecular formula
    C13H24O

    SMILES
    CCCCCCCCCC(=CC)C=O

    Safety labels

  • Odor profile

    Fragrance
    Fruity 69.05%
    Fatty 62.68%
    Waxy 58.24%
    Citrus 57.71%
    Green 53.57%
    Aldehydic 48.7%
    Floral 47.2%
    Fresh 46.74%
    Orange 43.09%
    Oily 36.88%

     

    Flavor
    Waxy 54.32%
    Citrus 52.74%
    Floral 52.67%
    Herbal 51.79%
    Fresh 44.85%
    Orange 44.22%
    Green 40.26%
    Fruity 37.72%
    Sweet 37.55%
    Aldehydic 35.52%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    5.1

    pKa est.
    8.16 (weak base)

    Molecular weight
    196.33 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Very slow

    Boiling point est.
    267°C

    Flash point

    • 108.82 ˚C est.

  • Synonyms

    • Undecanal, 2-ethylidene-
    • 2-Ethylideneundecanal
    • 6720-16-7
    • Undecanal, 2-ethylidene
    • EINECS 229-772-9
    • DTXSID5064461
    • RefChem:901028
    • DTXCID4044870
    • 2-nonyl-2-butenal
    • 2-nonyl crotonaldehyde
    • SCHEMBL20608616
    • UDHFJAGCBKZYMB-UHFFFAOYSA-N
    • DB-289576
    • 6720-16-7

  • Applications

    Undecanal, 2-ethylidene- (CAS number: 6720-16-7) is primarily used in perfumery as an odorant and fragrance intermediate, contributing long-lasting notes; it is also employed as a fragrance ingredient in cosmetics and personal care formulations to impart a sophisticated scent; in household products it appears as a fragrance component in air fresheners, detergents, and cleaning products; in industrial manufacturing it serves as a building block for the synthesis of aroma compounds and fragrance blends; and it may be used as a fragrance additive in coatings and inks, depending on formulation and regulatory considerations.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 4476.95
    methanol 2914.7
    isopropanol 5407.14
    water 0.02
    ethyl acetate 8135.15
    n-propanol 4697.57
    acetone 10150.6
    n-butanol 4727.62
    acetonitrile 5391.89
    DMF 4283.88
    toluene 2714.63
    isobutanol 3679.74
    1,4-dioxane 6503.58
    methyl acetate 4548.68
    THF 9423.2
    2-butanone 8628.84
    n-pentanol 2954.67
    sec-butanol 4756.11
    n-hexane 2230.09
    ethylene glycol 118.14
    NMP 2828.78
    cyclohexane 3524.54
    DMSO 4281.6
    n-butyl acetate 6468.31
    n-octanol 943.95
    chloroform 9083.58
    n-propyl acetate 5284.02
    acetic acid 1610.13
    dichloromethane 10080.93
    cyclohexanone 10050.17
    propylene glycol 354.81
    isopropyl acetate 4635.88
    DMAc 2334.75
    2-ethoxyethanol 2261.31
    isopentanol 4107.2
    n-heptane 976.73
    ethyl formate 2684.02
    1,2-dichloroethane 8685.47
    n-hexanol 3141.34
    2-methoxyethanol 3562.36
    isobutyl acetate 2499.35
    tetrachloromethane 1893.93
    n-pentyl acetate 2953.4
    transcutol 8107.89
    n-heptanol 1046.9
    ethylbenzene 1414.13
    MIBK 3537.67
    2-propoxyethanol 3247.94
    tert-butanol 5745.35
    MTBE 8189.02
    2-butoxyethanol 1652.93
    propionic acid 1907.92
    o-xylene 1190.96
    formic acid 173.29
    diethyl ether 11911.9
    m-xylene 1480.91
    p-xylene 1587.04
    chlorobenzene 3173.38
    dimethyl carbonate 619.73
    n-octane 289.99
    formamide 411.06
    cyclopentanone 6974.05
    2-pentanone 8402.85
    anisole 1985.13
    cyclopentyl methyl ether 6125.46
    gamma-butyrolactone 5312.91
    1-methoxy-2-propanol 3175.66
    pyridine 6629.5
    3-pentanone 4803.5
    furfural 3293.52
    n-dodecane 114.77
    diethylene glycol 943.37
    diisopropyl ether 2568.11
    tert-amyl alcohol 4224.97
    acetylacetone 4059.71
    n-hexadecane 142.3
    acetophenone 1627.98
    methyl propionate 3932.27
    isopentyl acetate 4887.86
    trichloroethylene 10895.63
    n-nonanol 829.91
    cyclohexanol 4506.65
    benzyl alcohol 1268.24
    2-ethylhexanol 2213.42
    isooctanol 986.81
    dipropyl ether 5124.43
    1,2-dichlorobenzene 2520.33
    ethyl lactate 796.57
    propylene carbonate 2783.12
    n-methylformamide 1756.29
    2-pentanol 3999.71
    n-pentane 1529.83
    1-propoxy-2-propanol 3258.85
    1-methoxy-2-propyl acetate 3219.99
    2-(2-methoxypropoxy) propanol 1095.82
    mesitylene 950.02
    ε-caprolactone 6166.13
    p-cymene 747.6
    epichlorohydrin 7136.89
    1,1,1-trichloroethane 8057.3
    2-aminoethanol 591.26
    morpholine-4-carbaldehyde 2826.92
    sulfolane 4497.93
    2,2,4-trimethylpentane 365.77
    2-methyltetrahydrofuran 10230.89
    n-hexyl acetate 2902.45
    isooctane 351.7
    2-(2-butoxyethoxy)ethanol 1787.95
    sec-butyl acetate 3226.58
    tert-butyl acetate 4075.01
    decalin 667.68
    glycerin 340.61
    diglyme 3804.49
    acrylic acid 958.37
    isopropyl myristate 903.75
    n-butyric acid 4961.41
    acetyl acetate 2332.34
    di(2-ethylhexyl) phthalate 488.6
    ethyl propionate 3888.67
    nitromethane 3435.26
    1,2-diethoxyethane 5922.45
    benzonitrile 2470.53
    trioctyl phosphate 421.03
    1-bromopropane 8419.2
    gamma-valerolactone 6793.44
    n-decanol 556.32
    triethyl phosphate 784.09
    4-methyl-2-pentanol 1636.9
    propionitrile 5296.7
    vinylene carbonate 2076.66
    1,1,2-trichlorotrifluoroethane 2652.43
    DMS 1306.37
    cumene 741.01
    2-octanol 866.63
    2-hexanone 4999.98
    octyl acetate 991.11
    limonene 1523.18
    1,2-dimethoxyethane 5897.11
    ethyl orthosilicate 852.64
    tributyl phosphate 606.85
    diacetone alcohol 2736.21
    N,N-dimethylaniline 1005.99
    acrylonitrile 3724.64
    aniline 2455.23
    1,3-propanediol 1346.91
    bromobenzene 3567.19
    dibromomethane 8288.46
    1,1,2,2-tetrachloroethane 8467.09
    2-methyl-cyclohexyl acetate 1631.65
    tetrabutyl urea 769.16
    diisobutyl methanol 1228.74
    2-phenylethanol 1367.9
    styrene 1978.7
    dioctyl adipate 1047.95
    dimethyl sulfate 796.58
    ethyl butyrate 3900.09
    methyl lactate 687.34
    butyl lactate 1336.25
    diethyl carbonate 1661.11
    propanediol butyl ether 998.47
    triethyl orthoformate 1930.87
    p-tert-butyltoluene 700.08
    methyl 4-tert-butylbenzoate 1041.26
    morpholine 9555.9
    tert-butylamine 4334.32
    n-dodecanol 407.6
    dimethoxymethane 3336.98
    ethylene carbonate 2220.02
    cyrene 761.21
    2-ethoxyethyl acetate 2837.27
    2-ethylhexyl acetate 3520.32
    1,2,4-trichlorobenzene 2519.19
    4-methylpyridine 6474.93
    dibutyl ether 3667.47
    2,6-dimethyl-4-heptanol 1228.74
    DEF 5999.56
    dimethyl isosorbide 1952.83
    tetrachloroethylene 5228.72
    eugenol 903.34
    triacetin 1448.22
    span 80 1086.74
    1,4-butanediol 433.35
    1,1-dichloroethane 10241.16
    2-methyl-1-pentanol 2398.98
    methyl formate 1027.83
    2-methyl-1-butanol 3636.33
    n-decane 270.59
    butyronitrile 6829.93
    3,7-dimethyl-1-octanol 1157.67
    1-chlorooctane 1129.08
    1-chlorotetradecane 323.07
    n-nonane 323.03
    undecane 163.33
    tert-butylcyclohexane 566.12
    cyclooctane 782.52
    cyclopentanol 3295.43
    tetrahydropyran 14415.54
    tert-amyl methyl ether 4396.32
    2,5,8-trioxanonane 1850.04
    1-hexene 5922.49
    2-isopropoxyethanol 1889.87
    2,2,2-trifluoroethanol 328.6
    methyl butyrate 5502.06

    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