Cyclopentenone, ethyl-

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  • Identifiers

    CAS number
    143629-30-5

    Molecular formula
    C7H10O

    SMILES
    CCC1=CCCC1=O

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Mint 59.45%
    Caramellic 55.63%
    Ketonic 52.7%
    Herbal 43.18%
    Burnt 41.0%
    Fruity 37.96%
    Nutty 33.79%
    Tobacco 33.3%
    Sweet 33.04%
    Roasted 32.77%

     

    Flavor
    Minty 44.1%
    Herbal 39.5%
    Spice 32.98%
    Celery 26.35%
    Spicy 25.62%
    Caramel 24.95%
    Mint 24.55%
    Basil 21.7%
    Fatty 21.56%
    Coumarin 21.34%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    1.3

    pKa est.
    8.18 (weak base)

    Molecular weight
    110.15 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Fast

    Boiling point est.
    175°C

    Flash point

    • 50.99 ˚C est.

  • Synonyms

    • Cyclopentenone, ethyl-
    • 143629-30-5
    • DTXSID30372924
    • RefChem:1082733
    • DTXCID30323956
    • 2-ethylcyclopent-2-en-1-one
    • 2931-10-4
    • ethylcyclopentenone
    • starbld0009314
    • SCHEMBL1340149
    • SCHEMBL8405807
    • 2-Cyclopenten-1-one, 2-ethyl
    • AKOS004907583
    • CS-0244923
    • EN300-2967356
    • 2931-10-4

  • Applications

    Cyclopentenone, ethyl- (CAS 143629-30-5) is a reactive synthetic intermediate used in the production of fine chemicals, including pharmaceuticals, agrochemicals, and other specialty compounds. In the fragrance and cosmetics industry, it is commonly employed as a fragrance intermediate or building block to craft aroma-related materials. Owing to its enone functionality, it can act as a Michael-type acceptor, enabling conjugate additions that are exploited in polymer and coating chemistries to introduce enone functionality. It is also used as a versatile starting material in research and development for tailored synthetic routes in industrial chemistry, with use and handling governed by local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1541.43
    methanol 2301.04
    isopropanol 1053.41
    water 10.29
    ethyl acetate 1212.55
    n-propanol 1166.78
    acetone 1431.46
    n-butanol 1151.93
    acetonitrile 1856.83
    DMF 1470.12
    toluene 838.19
    isobutanol 951.65
    1,4-dioxane 2263.81
    methyl acetate 1101.56
    THF 2158.71
    2-butanone 1175.22
    n-pentanol 930.11
    sec-butanol 875.61
    n-hexane 356.41
    ethylene glycol 284.16
    NMP 1588.64
    cyclohexane 408.39
    DMSO 1359.28
    n-butyl acetate 1068.38
    n-octanol 596.52
    chloroform 4806.1
    n-propyl acetate 892.08
    acetic acid 1634.18
    dichloromethane 4613.43
    cyclohexanone 1751.8
    propylene glycol 264.7
    isopropyl acetate 726.82
    DMAc 884.55
    2-ethoxyethanol 1126.31
    isopentanol 1015.95
    n-heptane 200.16
    ethyl formate 840.83
    1,2-dichloroethane 2308.28
    n-hexanol 904.83
    2-methoxyethanol 1405.93
    isobutyl acetate 574.16
    tetrachloromethane 1030.79
    n-pentyl acetate 815.39
    transcutol 4107.81
    n-heptanol 499.63
    ethylbenzene 551.31
    MIBK 723.78
    2-propoxyethanol 1177.84
    tert-butanol 1147.11
    MTBE 1079.05
    2-butoxyethanol 851.57
    propionic acid 1028.97
    o-xylene 497.88
    formic acid 683.24
    diethyl ether 1475.27
    m-xylene 523.26
    p-xylene 698.03
    chlorobenzene 1490.24
    dimethyl carbonate 407.29
    n-octane 98.92
    formamide 957.7
    cyclopentanone 1813.99
    2-pentanone 1077.98
    anisole 1046.49
    cyclopentyl methyl ether 1177.83
    gamma-butyrolactone 2138.45
    1-methoxy-2-propanol 903.97
    pyridine 2064.17
    3-pentanone 802.16
    furfural 1881.5
    n-dodecane 70.81
    diethylene glycol 762.57
    diisopropyl ether 476.08
    tert-amyl alcohol 939.92
    acetylacetone 1016.12
    n-hexadecane 81.21
    acetophenone 832.12
    methyl propionate 807.13
    isopentyl acetate 953.66
    trichloroethylene 3870.07
    n-nonanol 513.58
    cyclohexanol 974.14
    benzyl alcohol 802.47
    2-ethylhexanol 564.96
    isooctanol 452.47
    dipropyl ether 701.94
    1,2-dichlorobenzene 1329.65
    ethyl lactate 321.71
    propylene carbonate 1070.14
    n-methylformamide 1088.35
    2-pentanol 776.62
    n-pentane 286.69
    1-propoxy-2-propanol 792.44
    1-methoxy-2-propyl acetate 759.96
    2-(2-methoxypropoxy) propanol 722.58
    mesitylene 370.98
    ε-caprolactone 1541.59
    p-cymene 302.3
    epichlorohydrin 2406.14
    1,1,1-trichloroethane 2282.67
    2-aminoethanol 634.34
    morpholine-4-carbaldehyde 1692.78
    sulfolane 1903.6
    2,2,4-trimethylpentane 146.17
    2-methyltetrahydrofuran 1836.5
    n-hexyl acetate 1159.64
    isooctane 136.19
    2-(2-butoxyethoxy)ethanol 1114.83
    sec-butyl acetate 582.05
    tert-butyl acetate 789.91
    decalin 200.57
    glycerin 362.61
    diglyme 1990.74
    acrylic acid 907.2
    isopropyl myristate 421.76
    n-butyric acid 1487.82
    acetyl acetate 720.76
    di(2-ethylhexyl) phthalate 344.8
    ethyl propionate 681.76
    nitromethane 2119.44
    1,2-diethoxyethane 1583.7
    benzonitrile 1476.77
    trioctyl phosphate 244.14
    1-bromopropane 1494.01
    gamma-valerolactone 2003.6
    n-decanol 358.12
    triethyl phosphate 307.85
    4-methyl-2-pentanol 479.06
    propionitrile 1404.97
    vinylene carbonate 1113.37
    1,1,2-trichlorotrifluoroethane 1200.03
    DMS 752.02
    cumene 388.84
    2-octanol 400.27
    2-hexanone 918.64
    octyl acetate 522.28
    limonene 430.12
    1,2-dimethoxyethane 1678.94
    ethyl orthosilicate 331.57
    tributyl phosphate 342.74
    diacetone alcohol 726.89
    N,N-dimethylaniline 625.34
    acrylonitrile 1618.92
    aniline 1070.99
    1,3-propanediol 818.09
    bromobenzene 1610.08
    dibromomethane 3035.49
    1,1,2,2-tetrachloroethane 2595.21
    2-methyl-cyclohexyl acetate 529.85
    tetrabutyl urea 394.51
    diisobutyl methanol 342.04
    2-phenylethanol 743.57
    styrene 798.42
    dioctyl adipate 492.12
    dimethyl sulfate 521.25
    ethyl butyrate 716.99
    methyl lactate 332.08
    butyl lactate 472.15
    diethyl carbonate 483.6
    propanediol butyl ether 684.63
    triethyl orthoformate 494.76
    p-tert-butyltoluene 283.63
    methyl 4-tert-butylbenzoate 645.65
    morpholine 2221.45
    tert-butylamine 924.67
    n-dodecanol 260.93
    dimethoxymethane 1014.52
    ethylene carbonate 932.03
    cyrene 500.45
    2-ethoxyethyl acetate 1032.68
    2-ethylhexyl acetate 727.84
    1,2,4-trichlorobenzene 1309.77
    4-methylpyridine 2047.04
    dibutyl ether 842.54
    2,6-dimethyl-4-heptanol 342.04
    DEF 1112.46
    dimethyl isosorbide 1091.13
    tetrachloroethylene 2133.1
    eugenol 682.0
    triacetin 772.93
    span 80 608.31
    1,4-butanediol 422.22
    1,1-dichloroethane 2373.68
    2-methyl-1-pentanol 888.73
    methyl formate 754.25
    2-methyl-1-butanol 975.38
    n-decane 130.07
    butyronitrile 1492.68
    3,7-dimethyl-1-octanol 593.27
    1-chlorooctane 464.81
    1-chlorotetradecane 177.08
    n-nonane 135.2
    undecane 91.33
    tert-butylcyclohexane 210.45
    cyclooctane 148.37
    cyclopentanol 989.48
    tetrahydropyran 1907.33
    tert-amyl methyl ether 761.73
    2,5,8-trioxanonane 1199.95
    1-hexene 833.11
    2-isopropoxyethanol 800.92
    2,2,2-trifluoroethanol 515.37
    methyl butyrate 902.84

    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