2,5-Undecadienal

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  • Identifiers

    CAS number
    91254-00-1

    Molecular formula
    C11H18O

    SMILES
    CCCCC/C=C/C/C=C/C=O

  • Odor profile

    Fragrance
    Fatty 88.76%
    Citrus 69.94%
    Green 63.57%
    Waxy 62.39%
    Aldehydic 55.18%
    Cucumber 52.58%
    Melon 52.56%
    Fruity 50.65%
    Oily 47.63%
    Orange 44.16%

     

    Flavor
    Fatty 61.84%
    Green 49.88%
    Cucumber 48.57%
    Citrus 48.45%
    Melon 47.36%
    Orange 39.49%
    Waxy 37.2%
    Fat 37.14%
    Oily 32.63%
    Sweet 30.85%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    3.5

    pKa est.
    7.52 (neutral)

    Molecular weight
    166.26 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Slow

    Boiling point est.
    242°C

    Flash point

    • 110.72 ˚C est.

  • Synonyms

    • 2,5-Undecadienal
    • 91254-00-1
    • (2E,5E)-undeca-2,5-dienal
    • (2E,5Z)-undeca-2,5-dienal
    • LMFA06000068
    • SCHEMBL887154
    • DTXSID70920509
    • CHEBI:168933
    • XCXOPZBEPMNLSI-AVQMFFATSA-N

  • Applications

    2,5-Undecadienal (CAS 91254-00-1) is a long-chain unsaturated aldehyde primarily used as a fragrance ingredient in the perfumery industry, contributing aldehydic and green notes to scent formulations. It is commonly incorporated into cosmetics and personal care products as a fragrance component or aroma ingredient. In household products such as cleaners and air fresheners, it may be used to impart or enhance fragrance. Additionally, 2,5-Undecadienal serves as a chemical intermediate in the synthesis of other fragrance compounds and aroma chemicals used in fragrance formulation. Applications are subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 2995.24
    methanol 2590.31
    isopropanol 2297.07
    water 0.02
    ethyl acetate 2736.31
    n-propanol 2371.61
    acetone 3537.2
    n-butanol 2130.54
    acetonitrile 1537.23
    DMF 1664.26
    toluene 892.28
    isobutanol 1448.8
    1,4-dioxane 2437.98
    methyl acetate 1510.71
    THF 4213.88
    2-butanone 2790.28
    n-pentanol 1518.88
    sec-butanol 1802.5
    n-hexane 778.69
    ethylene glycol 171.87
    NMP 1057.14
    cyclohexane 691.62
    DMSO 3464.37
    n-butyl acetate 2036.02
    n-octanol 342.78
    chloroform 2722.48
    n-propyl acetate 1670.57
    acetic acid 893.72
    dichloromethane 3445.12
    cyclohexanone 2796.72
    propylene glycol 410.23
    isopropyl acetate 1398.81
    DMAc 922.32
    2-ethoxyethanol 1340.73
    isopentanol 1678.46
    n-heptane 281.24
    ethyl formate 779.23
    1,2-dichloroethane 3041.05
    n-hexanol 1546.03
    2-methoxyethanol 2255.97
    isobutyl acetate 870.17
    tetrachloromethane 459.29
    n-pentyl acetate 724.06
    transcutol 4914.46
    n-heptanol 394.92
    ethylbenzene 435.42
    MIBK 1205.17
    2-propoxyethanol 1733.87
    tert-butanol 2264.59
    MTBE 2441.66
    2-butoxyethanol 686.54
    propionic acid 916.65
    o-xylene 385.8
    formic acid 148.42
    diethyl ether 4001.6
    m-xylene 541.34
    p-xylene 435.92
    chlorobenzene 865.48
    dimethyl carbonate 268.15
    n-octane 73.63
    formamide 283.59
    cyclopentanone 2492.27
    2-pentanone 2705.15
    anisole 712.79
    cyclopentyl methyl ether 2392.7
    gamma-butyrolactone 1907.56
    1-methoxy-2-propanol 1921.34
    pyridine 2074.21
    3-pentanone 1534.23
    furfural 1138.64
    n-dodecane 35.09
    diethylene glycol 770.27
    diisopropyl ether 842.31
    tert-amyl alcohol 1593.83
    acetylacetone 1608.3
    n-hexadecane 42.19
    acetophenone 597.77
    methyl propionate 1470.55
    isopentyl acetate 1550.14
    trichloroethylene 3646.42
    n-nonanol 301.84
    cyclohexanol 1503.41
    benzyl alcohol 589.41
    2-ethylhexanol 881.35
    isooctanol 340.51
    dipropyl ether 1674.73
    1,2-dichlorobenzene 666.36
    ethyl lactate 346.63
    propylene carbonate 866.05
    n-methylformamide 827.04
    2-pentanol 1602.53
    n-pentane 482.4
    1-propoxy-2-propanol 1487.06
    1-methoxy-2-propyl acetate 1266.31
    2-(2-methoxypropoxy) propanol 563.75
    mesitylene 331.91
    ε-caprolactone 1697.65
    p-cymene 244.12
    epichlorohydrin 2922.82
    1,1,1-trichloroethane 2027.45
    2-aminoethanol 601.81
    morpholine-4-carbaldehyde 1242.49
    sulfolane 1941.16
    2,2,4-trimethylpentane 136.56
    2-methyltetrahydrofuran 3684.52
    n-hexyl acetate 850.61
    isooctane 132.04
    2-(2-butoxyethoxy)ethanol 880.51
    sec-butyl acetate 998.38
    tert-butyl acetate 1300.42
    decalin 220.45
    glycerin 362.84
    diglyme 1706.83
    acrylic acid 479.54
    isopropyl myristate 288.9
    n-butyric acid 1784.3
    acetyl acetate 781.95
    di(2-ethylhexyl) phthalate 198.02
    ethyl propionate 1198.7
    nitromethane 1433.84
    1,2-diethoxyethane 2437.71
    benzonitrile 724.67
    trioctyl phosphate 152.83
    1-bromopropane 2600.55
    gamma-valerolactone 2234.01
    n-decanol 215.07
    triethyl phosphate 294.09
    4-methyl-2-pentanol 650.02
    propionitrile 1501.86
    vinylene carbonate 655.78
    1,1,2-trichlorotrifluoroethane 1304.51
    DMS 495.89
    cumene 256.28
    2-octanol 258.96
    2-hexanone 1892.23
    octyl acetate 322.91
    limonene 509.58
    1,2-dimethoxyethane 2295.73
    ethyl orthosilicate 331.03
    tributyl phosphate 227.18
    diacetone alcohol 1158.96
    N,N-dimethylaniline 400.95
    acrylonitrile 1293.76
    aniline 916.6
    1,3-propanediol 937.51
    bromobenzene 984.65
    dibromomethane 2698.58
    1,1,2,2-tetrachloroethane 2759.58
    2-methyl-cyclohexyl acetate 604.98
    tetrabutyl urea 278.15
    diisobutyl methanol 479.51
    2-phenylethanol 629.1
    styrene 611.41
    dioctyl adipate 378.88
    dimethyl sulfate 370.03
    ethyl butyrate 1196.99
    methyl lactate 375.6
    butyl lactate 432.37
    diethyl carbonate 524.87
    propanediol butyl ether 513.5
    triethyl orthoformate 622.63
    p-tert-butyltoluene 237.07
    methyl 4-tert-butylbenzoate 360.26
    morpholine 3636.33
    tert-butylamine 1633.89
    n-dodecanol 157.65
    dimethoxymethane 1660.14
    ethylene carbonate 624.71
    cyrene 389.37
    2-ethoxyethyl acetate 907.79
    2-ethylhexyl acetate 1110.34
    1,2,4-trichlorobenzene 702.8
    4-methylpyridine 1888.39
    dibutyl ether 1098.72
    2,6-dimethyl-4-heptanol 479.51
    DEF 1964.33
    dimethyl isosorbide 906.08
    tetrachloroethylene 1735.5
    eugenol 365.31
    triacetin 552.92
    span 80 505.61
    1,4-butanediol 326.76
    1,1-dichloroethane 2893.05
    2-methyl-1-pentanol 1139.24
    methyl formate 440.42
    2-methyl-1-butanol 1468.43
    n-decane 75.52
    butyronitrile 1950.25
    3,7-dimethyl-1-octanol 444.79
    1-chlorooctane 324.47
    1-chlorotetradecane 102.47
    n-nonane 87.66
    undecane 49.51
    tert-butylcyclohexane 208.18
    cyclooctane 193.51
    cyclopentanol 1247.4
    tetrahydropyran 4562.41
    tert-amyl methyl ether 1463.41
    2,5,8-trioxanonane 951.09
    1-hexene 2159.5
    2-isopropoxyethanol 949.37
    2,2,2-trifluoroethanol 142.72
    methyl butyrate 1590.58

    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