Cyclotene

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  • Identifiers

    CAS number
    80-71-7

    Molecular formula
    C6H8O2

    SMILES
    CC1=C(C(=O)CC1)O

  • Odor profile

    Fragrance
    Caramellic 84.91%
    Burnt 60.19%
    Sweet 50.49%
    Roasted 38.18%
    Coffee 36.33%
    Nutty 29.84%
    Phenolic 25.27%
    Buttery 24.68%
    Malty 24.21%
    Sharp 21.28%

     

    Flavor
    Caramel 61.77%
    Maple 51.92%
    Sweet 37.5%
    Sugar 34.1%
    Smoky 32.51%
    Phenolic 31.73%
    Candy 28.63%
    Maple syrup 26.62%
    Spice 24.85%
    Seedy 24.01%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    0.3

    pKa est.
    7.94 (neutral)

    Molecular weight
    112.13 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    269°C

    Flash point

    • 90.32 ˚C est.

    Solubility expt.

    • soluble in alcohol and propylene glycol; slightly soluble in most fixed oils and 1 g in 72 ml water
    • 1 g in 5 ml 90% alcohol (in ethanol)

  • Synonyms

    • 80-71-7
    • Cyclotene
    • 2-Hydroxy-3-methylcyclopent-2-enone
    • Methyl cyclopentenolone
    • Corylon
    • Corylone
    • Maple lactone
    • Cycloten
    • 2-HYDROXY-3-METHYL-2-CYCLOPENTEN-1-ONE
    • 2-hydroxy-3-methylcyclopent-2-en-1-one
    • 2-Cyclopenten-1-one, 2-hydroxy-3-methyl-
    • 2-Hydroxy-3-methyl-2-cyclopentenone
    • Methylcyclopentenolone
    • Cyclotene (ordorant)
    • 2-Hydroxy-1-methylcyclopenten-3-one
    • 3-Methyl-2-hydroxy-2-cyclopentenone
    • 3-Methylcyclopent-2-en-2-ol-1-one
    • CCRIS 2940
    • NSC 133445
    • EINECS 201-303-2
    • 3-methyl-2-cyclopenten-2-ol-1-one
    • 3-Methyl-2-cyclopentene-2-ol-1-one
    • EPA Pesticide Chemical Code 004049
    • BRN 2039308
    • AI3-36598
    • NSC-133445
    • DTXSID4035128
    • METHYLCYCLOPENTENOLONE [FHFI]
    • METHYL CYCLOPENTENOLONE [FCC]
    • 627E92X64B
    • 2-hydroxy-3-methyl-cyclopent-2-enone
    • UNII-627E92X64B
    • Cyclotene (odorant)
    • MFCD00013747
    • 2-hydroxy-3-methyl-cyclopent-2-en-1-one
    • 3Methylcyclopent2en2ol1one
    • 3Methyl2cyclopentene2ol1one
    • NCIOpen2_001017
    • 2Hydroxy1methylcyclopenten3one
    • 2Hydroxy3methylcyclopent2enone
    • 3Methyl2hydroxy2cyclopentenone
    • SCHEMBL112009
    • 2Hydroxy3methyl2cyclopenten1one
    • 3-Methyl-2-cyclopentenon-2-ol
    • DTXCID2015128
    • 2Cyclopenten1one, 2hydroxy3methyl
    • NSC84226
    • NSC-84226
    • NSC133445
    • AKOS015960664
    • AKOS025243271
    • CS-W013661
    • DS-2505
    • 2-hydroxy-3-methyl-2-cyclopentene-1-one
    • FH140032
    • H0469
    • NS00012874
    • 2-Hydroxy-3-methyl-2-cyclopentenone , 98%
    • EN300-113773
    • O10798
    • Q25101336
    • Z1483987834
    • InChI=1/C6H8O2/c1-4-2-3-5(7)6(4)8/h8H,2-3H2,1H

  • Applications

    Cyclotene (CAS 80-71-7) is primarily used as an intermediate in organic synthesis and as a processing solvent or reactive diluent in coatings, inks, and adhesives. It is also employed as a monomer or comonomer in the production of specialty polymers, enabling control over material properties and polymer blend compatibility. In industrial manufacturing, it can serve as a cleaning solvent and as a formulation component where volatility and solvency are required. Its applications are driven by its chemical reactivity and volatility, and use is subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 309.23
    methanol 468.96
    isopropanol 213.58
    water 113.68
    ethyl acetate 138.57
    n-propanol 183.68
    acetone 161.13
    n-butanol 154.83
    acetonitrile 130.41
    DMF 232.49
    toluene 18.19
    isobutanol 147.12
    1,4-dioxane 253.21
    methyl acetate 165.4
    THF 183.33
    2-butanone 114.58
    n-pentanol 123.61
    sec-butanol 189.9
    n-hexane 5.47
    ethylene glycol 168.65
    NMP 122.15
    cyclohexane 4.97
    DMSO 217.71
    n-butyl acetate 59.42
    n-octanol 83.4
    chloroform 168.74
    n-propyl acetate 77.08
    acetic acid 457.45
    dichloromethane 134.16
    cyclohexanone 90.48
    propylene glycol 143.59
    isopropyl acetate 92.02
    DMAc 221.45
    2-ethoxyethanol 332.25
    isopentanol 170.55
    n-heptane 5.15
    ethyl formate 111.38
    1,2-dichloroethane 77.75
    n-hexanol 96.04
    2-methoxyethanol 439.16
    isobutyl acetate 51.89
    tetrachloromethane 52.26
    n-pentyl acetate 73.13
    transcutol 828.21
    n-heptanol 92.82
    ethylbenzene 24.03
    MIBK 91.93
    2-propoxyethanol 191.99
    tert-butanol 315.13
    MTBE 155.15
    2-butoxyethanol 194.23
    propionic acid 204.2
    o-xylene 30.07
    formic acid 493.56
    diethyl ether 98.94
    m-xylene 25.19
    p-xylene 42.39
    chlorobenzene 36.97
    dimethyl carbonate 66.46
    n-octane 4.6
    formamide 760.44
    cyclopentanone 118.18
    2-pentanone 88.82
    anisole 96.2
    cyclopentyl methyl ether 66.83
    gamma-butyrolactone 179.14
    1-methoxy-2-propanol 281.67
    pyridine 102.83
    3-pentanone 57.01
    furfural 219.16
    n-dodecane 4.74
    diethylene glycol 229.84
    diisopropyl ether 37.98
    tert-amyl alcohol 274.93
    acetylacetone 140.19
    n-hexadecane 5.11
    acetophenone 96.76
    methyl propionate 99.16
    isopentyl acetate 77.14
    trichloroethylene 183.58
    n-nonanol 74.28
    cyclohexanol 76.92
    benzyl alcohol 98.42
    2-ethylhexanol 58.21
    isooctanol 86.43
    dipropyl ether 33.14
    1,2-dichlorobenzene 52.59
    ethyl lactate 61.69
    propylene carbonate 115.9
    n-methylformamide 229.4
    2-pentanol 124.55
    n-pentane 6.85
    1-propoxy-2-propanol 114.21
    1-methoxy-2-propyl acetate 88.73
    2-(2-methoxypropoxy) propanol 180.48
    mesitylene 22.57
    ε-caprolactone 112.75
    p-cymene 23.48
    epichlorohydrin 186.3
    1,1,1-trichloroethane 101.49
    2-aminoethanol 290.91
    morpholine-4-carbaldehyde 258.4
    sulfolane 191.3
    2,2,4-trimethylpentane 9.27
    2-methyltetrahydrofuran 121.66
    n-hexyl acetate 104.68
    isooctane 8.23
    2-(2-butoxyethoxy)ethanol 254.15
    sec-butyl acetate 62.04
    tert-butyl acetate 123.34
    decalin 6.83
    glycerin 241.7
    diglyme 426.57
    acrylic acid 203.13
    isopropyl myristate 45.22
    n-butyric acid 198.29
    acetyl acetate 102.22
    di(2-ethylhexyl) phthalate 55.28
    ethyl propionate 62.84
    nitromethane 526.85
    1,2-diethoxyethane 145.27
    benzonitrile 74.85
    trioctyl phosphate 39.9
    1-bromopropane 32.75
    gamma-valerolactone 209.37
    n-decanol 53.74
    triethyl phosphate 37.11
    4-methyl-2-pentanol 97.58
    propionitrile 74.81
    vinylene carbonate 111.48
    1,1,2-trichlorotrifluoroethane 231.57
    DMS 83.43
    cumene 29.11
    2-octanol 66.22
    2-hexanone 73.45
    octyl acetate 57.05
    limonene 26.94
    1,2-dimethoxyethane 294.65
    ethyl orthosilicate 38.69
    tributyl phosphate 41.52
    diacetone alcohol 190.98
    N,N-dimethylaniline 76.42
    acrylonitrile 116.08
    aniline 65.32
    1,3-propanediol 299.55
    bromobenzene 28.12
    dibromomethane 73.43
    1,1,2,2-tetrachloroethane 151.05
    2-methyl-cyclohexyl acetate 59.59
    tetrabutyl urea 51.38
    diisobutyl methanol 45.25
    2-phenylethanol 95.61
    styrene 25.82
    dioctyl adipate 61.51
    dimethyl sulfate 105.98
    ethyl butyrate 52.31
    methyl lactate 95.03
    butyl lactate 74.15
    diethyl carbonate 40.37
    propanediol butyl ether 180.62
    triethyl orthoformate 44.1
    p-tert-butyltoluene 24.49
    methyl 4-tert-butylbenzoate 121.27
    morpholine 236.72
    tert-butylamine 166.61
    n-dodecanol 39.09
    dimethoxymethane 169.55
    ethylene carbonate 82.09
    cyrene 128.52
    2-ethoxyethyl acetate 127.18
    2-ethylhexyl acetate 49.47
    1,2,4-trichlorobenzene 64.74
    4-methylpyridine 85.66
    dibutyl ether 50.49
    2,6-dimethyl-4-heptanol 45.25
    DEF 110.88
    dimethyl isosorbide 191.98
    tetrachloroethylene 149.67
    eugenol 142.7
    triacetin 115.81
    span 80 130.31
    1,4-butanediol 149.29
    1,1-dichloroethane 79.9
    2-methyl-1-pentanol 135.5
    methyl formate 177.21
    2-methyl-1-butanol 151.93
    n-decane 7.42
    butyronitrile 71.12
    3,7-dimethyl-1-octanol 83.37
    1-chlorooctane 28.84
    1-chlorotetradecane 13.02
    n-nonane 6.27
    undecane 5.81
    tert-butylcyclohexane 9.45
    cyclooctane 2.67
    cyclopentanol 88.96
    tetrahydropyran 93.44
    tert-amyl methyl ether 104.55
    2,5,8-trioxanonane 282.78
    1-hexene 20.4
    2-isopropoxyethanol 220.34
    2,2,2-trifluoroethanol 268.65
    methyl butyrate 90.6

    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