4-Methylcyclopentene

Overview IFRA Request a quote

  • Identifiers

    CAS number
    1759-81-5

    Molecular formula
    C6H10

    SMILES
    CC1CC=CC1

    Safety labels

  • Odor profile

    Fragrance
    Citrus 67.42%
    Herbal 39.22%
    Lemon 37.73%
    Spicy 35.9%
    Woody 35.08%
    Gassy 32.05%
    Terpenic 30.15%
    Fresh 28.96%
    Dry 27.1%
    Mint 22.83%

     

    Flavor
    Spice 26.7%
    Wood 25.02%
    Woody 23.74%
    Ammoniacal 21.87%
    Shrimp 20.95%
    Terpentine 20.77%
    Alkaline 19.51%
    Mint 19.43%
    Citric 19.09%
    Beet 18.63%

     

    Odor impact est.
    Medium

  • Properties

    XLogP3-AA
    2.2

    pKa est.
    8.89 (weak base)

    Molecular weight
    82.14 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra fast

    Boiling point est.
    68°C

    Flash point

    • -20.26 ˚C est.

  • Synonyms

    • 4-METHYLCYCLOPENTENE
    • Cyclopentene, 4-methyl-
    • 1-Methyl-3-cyclopentene
    • ZR36R3G0PY
    • UNII-ZR36R3G0PY
    • DTXSID30170043
    • RefChem:99868
    • DTXCID0092534
    • FWMRUAODTCVEQK-UHFFFAOYSA-N
    • 1759-81-5
    • 4-Methylcyclopentene.
    • Cyclopentene,4-methyl-
    • 4-methylcyclopent-1-ene
    • 4-methyl-cyclopentene
    • 4-Methyl-1-cyclopentene #
    • SCHEMBL34967
    • SCHEMBL766955
    • SCHEMBL767019
    • SCHEMBL767100
    • SCHEMBL1088156
    • SCHEMBL6905564
    • SCHEMBL7714052
    • CHEBI:229291
    • 1759-81-5

  • Applications

    4-Methylcyclopentene (CAS 1759-81-5) is viewed as an organic-synthesis intermediate and building block, with potential use across industrial production and the development of cyclopentyl-containing compounds. It can be employed as a monomer or comonomer for specialty polymers and plastics, with possible functional transformations to deliver materials with targeted properties. In fragrance and perfumery, it may be evaluated as a fragrance ingredient or precursor for aroma compounds. It may also serve as a chemical platform for research and development in synthesis and formulation, including coatings and adhesives, subject to local regulations and formulation constraints.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 450.23
    methanol 253.96
    isopropanol 428.5
    water 0.33
    ethyl acetate 812.0
    n-propanol 473.08
    acetone 368.74
    n-butanol 551.46
    acetonitrile 365.77
    DMF 189.79
    toluene 421.25
    isobutanol 331.06
    1,4-dioxane 846.04
    methyl acetate 472.72
    THF 1032.7
    2-butanone 518.99
    n-pentanol 341.18
    sec-butanol 506.82
    n-hexane 403.1
    ethylene glycol 69.18
    NMP 217.98
    cyclohexane 390.06
    DMSO 254.11
    n-butyl acetate 1001.11
    n-octanol 312.08
    chloroform 1264.58
    n-propyl acetate 370.2
    acetic acid 242.12
    dichloromethane 859.16
    cyclohexanone 467.92
    propylene glycol 162.9
    isopropyl acetate 506.62
    DMAc 246.1
    2-ethoxyethanol 328.14
    isopentanol 453.53
    n-heptane 565.29
    ethyl formate 211.54
    1,2-dichloroethane 525.39
    n-hexanol 812.37
    2-methoxyethanol 456.14
    isobutyl acetate 243.22
    tetrachloromethane 317.87
    n-pentyl acetate 316.89
    transcutol 1475.74
    n-heptanol 304.46
    ethylbenzene 206.63
    MIBK 356.06
    2-propoxyethanol 810.89
    tert-butanol 513.88
    MTBE 735.3
    2-butoxyethanol 386.69
    propionic acid 301.31
    o-xylene 233.21
    formic acid 44.97
    diethyl ether 965.08
    m-xylene 302.05
    p-xylene 195.03
    chlorobenzene 366.05
    dimethyl carbonate 136.43
    n-octane 146.48
    formamide 63.97
    cyclopentanone 473.65
    2-pentanone 527.0
    anisole 327.8
    cyclopentyl methyl ether 612.6
    gamma-butyrolactone 413.73
    1-methoxy-2-propanol 494.81
    pyridine 571.65
    3-pentanone 427.02
    furfural 333.57
    n-dodecane 88.78
    diethylene glycol 379.42
    diisopropyl ether 421.0
    tert-amyl alcohol 505.31
    acetylacetone 436.92
    n-hexadecane 94.91
    acetophenone 218.48
    methyl propionate 426.45
    isopentyl acetate 670.53
    trichloroethylene 766.0
    n-nonanol 288.3
    cyclohexanol 396.89
    benzyl alcohol 200.79
    2-ethylhexanol 638.22
    isooctanol 251.79
    dipropyl ether 1082.79
    1,2-dichlorobenzene 294.92
    ethyl lactate 149.71
    propylene carbonate 324.87
    n-methylformamide 128.47
    2-pentanol 489.44
    n-pentane 371.88
    1-propoxy-2-propanol 859.37
    1-methoxy-2-propyl acetate 694.24
    2-(2-methoxypropoxy) propanol 404.77
    mesitylene 200.39
    ε-caprolactone 459.48
    p-cymene 248.97
    epichlorohydrin 554.85
    1,1,1-trichloroethane 680.6
    2-aminoethanol 176.7
    morpholine-4-carbaldehyde 359.88
    sulfolane 330.21
    2,2,4-trimethylpentane 155.22
    2-methyltetrahydrofuran 865.02
    n-hexyl acetate 420.8
    isooctane 154.06
    2-(2-butoxyethoxy)ethanol 571.65
    sec-butyl acetate 314.5
    tert-butyl acetate 486.18
    decalin 158.35
    glycerin 166.11
    diglyme 829.94
    acrylic acid 188.21
    isopropyl myristate 221.5
    n-butyric acid 527.6
    acetyl acetate 416.89
    di(2-ethylhexyl) phthalate 149.09
    ethyl propionate 369.2
    nitromethane 261.63
    1,2-diethoxyethane 901.22
    benzonitrile 258.47
    trioctyl phosphate 113.65
    1-bromopropane 757.43
    gamma-valerolactone 450.23
    n-decanol 229.3
    triethyl phosphate 198.18
    4-methyl-2-pentanol 315.74
    propionitrile 438.37
    vinylene carbonate 253.29
    1,1,2-trichlorotrifluoroethane 349.03
    DMS 251.74
    cumene 141.85
    2-octanol 208.11
    2-hexanone 377.13
    octyl acetate 260.35
    limonene 427.62
    1,2-dimethoxyethane 500.07
    ethyl orthosilicate 231.18
    tributyl phosphate 144.2
    diacetone alcohol 412.08
    N,N-dimethylaniline 193.1
    acrylonitrile 320.87
    aniline 359.95
    1,3-propanediol 265.44
    bromobenzene 429.74
    dibromomethane 810.76
    1,1,2,2-tetrachloroethane 711.44
    2-methyl-cyclohexyl acetate 332.02
    tetrabutyl urea 163.27
    diisobutyl methanol 346.42
    2-phenylethanol 365.14
    styrene 257.04
    dioctyl adipate 240.04
    dimethyl sulfate 119.75
    ethyl butyrate 671.81
    methyl lactate 168.99
    butyl lactate 217.3
    diethyl carbonate 372.56
    propanediol butyl ether 296.08
    triethyl orthoformate 465.88
    p-tert-butyltoluene 248.56
    methyl 4-tert-butylbenzoate 247.39
    morpholine 850.51
    tert-butylamine 478.14
    n-dodecanol 193.55
    dimethoxymethane 339.24
    ethylene carbonate 248.11
    cyrene 175.1
    2-ethoxyethyl acetate 400.63
    2-ethylhexyl acetate 585.62
    1,2,4-trichlorobenzene 317.92
    4-methylpyridine 457.37
    dibutyl ether 617.0
    2,6-dimethyl-4-heptanol 346.42
    DEF 411.88
    dimethyl isosorbide 471.43
    tetrachloroethylene 453.86
    eugenol 222.74
    triacetin 322.74
    span 80 392.22
    1,4-butanediol 104.91
    1,1-dichloroethane 661.62
    2-methyl-1-pentanol 335.47
    methyl formate 81.61
    2-methyl-1-butanol 435.99
    n-decane 151.6
    butyronitrile 521.14
    3,7-dimethyl-1-octanol 365.78
    1-chlorooctane 284.65
    1-chlorotetradecane 134.75
    n-nonane 172.97
    undecane 110.74
    tert-butylcyclohexane 150.24
    cyclooctane 208.05
    cyclopentanol 329.32
    tetrahydropyran 975.8
    tert-amyl methyl ether 556.06
    2,5,8-trioxanonane 563.39
    1-hexene 630.4
    2-isopropoxyethanol 309.81
    2,2,2-trifluoroethanol 76.87
    methyl butyrate 354.97

    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