1,2,4,4-Tetramethylcyclopentene

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  • Identifiers

    CAS number
    65378-76-9

    Molecular formula
    C9H16

    SMILES
    CC1=C(CC(C1)(C)C)C

    Safety labels

  • Odor profile

    Fragrance
    Woody 73.34%
    Sweet 58.33%
    Spicy 47.33%
    Fruity 41.1%
    Dry 39.97%
    Tobacco 36.14%
    Camphoreous 34.31%
    Amber 34.23%
    Earthy 33.52%
    Herbal 33.17%

     

    Flavor
    Woody 51.09%
    Camphor 36.12%
    Earthy 35.46%
    Dry 31.34%
    Sweet 29.21%
    Pine 23.94%
    Wood 23.85%
    Musty 23.61%
    Spicy 21.98%
    Pungent 21.71%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    2.4

    pKa est.
    10.26 (weak base)

    Molecular weight
    124.22 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra fast

    Boiling point est.
    129°C

    Flash point

    • 19.48 ˚C est.

  • Synonyms

    • 1,2,4,4-Tetramethylcyclopentene
    • 65378-76-9
    • DTXSID30215701
    • RefChem:71449
    • DTXCID20138192
    • NOZQIIOHDFVATK-UHFFFAOYSA-N
    • 1,2,4,4-TETRAMETHYLCYCLOPENT-1-ENE
    • 1,2,4,4-Tetramethyl-1-cyclopentene
    • Cyclopentene, 1,2,4,4-tetramethyl-
    • SCHEMBL21957678
    • 1,2,4,4-tetramethyl-cyclopentene
    • AKOS006271515
    • 1,2,4,4-Tetramethyl-1-cyclopentene #
    • 65378-76-9

  • Applications

    1,2,4,4-Tetramethylcyclopentene (CAS 65378-76-9) finds potential use as a nonpolar odorant precursor and fragrance-component in perfumery and cosmetics/personal care, where it may contribute to aroma profiles. It can be evaluated as an intermediate in industrial manufacturing for synthesis of specialty chemicals. In coatings and inks, it may serve as a solvent or processing aid for nonpolar formulations. In the field of polymers and plastics, it has potential as a monomer or comonomer in niche polymer systems; its incorporation would depend on polymerization feasibility and formulation constraints. Overall, its use is formulation- and regulation-dependent.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 592.51
    methanol 530.47
    isopropanol 532.43
    water 2.06
    ethyl acetate 912.23
    n-propanol 585.69
    acetone 596.35
    n-butanol 727.68
    acetonitrile 529.5
    DMF 435.0
    toluene 792.15
    isobutanol 515.83
    1,4-dioxane 1164.85
    methyl acetate 719.05
    THF 1703.07
    2-butanone 753.89
    n-pentanol 491.61
    sec-butanol 647.09
    n-hexane 1004.04
    ethylene glycol 90.94
    NMP 736.56
    cyclohexane 950.82
    DMSO 254.62
    n-butyl acetate 1271.57
    n-octanol 746.75
    chloroform 1512.48
    n-propyl acetate 485.11
    acetic acid 391.3
    dichloromethane 1049.24
    cyclohexanone 1042.7
    propylene glycol 162.05
    isopropyl acetate 766.51
    DMAc 578.63
    2-ethoxyethanol 404.66
    isopentanol 699.26
    n-heptane 1220.11
    ethyl formate 384.14
    1,2-dichloroethane 705.18
    n-hexanol 1591.65
    2-methoxyethanol 598.86
    isobutyl acetate 453.53
    tetrachloromethane 576.77
    n-pentyl acetate 648.87
    transcutol 1301.76
    n-heptanol 682.66
    ethylbenzene 466.62
    MIBK 619.82
    2-propoxyethanol 1224.86
    tert-butanol 805.14
    MTBE 1374.46
    2-butoxyethanol 642.68
    propionic acid 389.94
    o-xylene 578.9
    formic acid 110.61
    diethyl ether 1384.54
    m-xylene 659.87
    p-xylene 564.48
    chlorobenzene 641.8
    dimethyl carbonate 260.79
    n-octane 377.57
    formamide 112.12
    cyclopentanone 911.57
    2-pentanone 752.31
    anisole 537.08
    cyclopentyl methyl ether 1379.04
    gamma-butyrolactone 867.82
    1-methoxy-2-propanol 584.65
    pyridine 674.95
    3-pentanone 736.51
    furfural 564.5
    n-dodecane 238.37
    diethylene glycol 489.34
    diisopropyl ether 905.73
    tert-amyl alcohol 853.21
    acetylacetone 612.23
    n-hexadecane 264.09
    acetophenone 399.71
    methyl propionate 617.9
    isopentyl acetate 1155.1
    trichloroethylene 995.17
    n-nonanol 682.81
    cyclohexanol 838.79
    benzyl alcohol 297.18
    2-ethylhexanol 1282.33
    isooctanol 566.37
    dipropyl ether 1579.39
    1,2-dichlorobenzene 572.05
    ethyl lactate 212.16
    propylene carbonate 623.29
    n-methylformamide 240.29
    2-pentanol 717.69
    n-pentane 801.0
    1-propoxy-2-propanol 1185.09
    1-methoxy-2-propyl acetate 935.77
    2-(2-methoxypropoxy) propanol 612.88
    mesitylene 513.47
    ε-caprolactone 964.8
    p-cymene 584.31
    epichlorohydrin 838.56
    1,1,1-trichloroethane 1106.18
    2-aminoethanol 218.09
    morpholine-4-carbaldehyde 732.74
    sulfolane 679.4
    2,2,4-trimethylpentane 414.56
    2-methyltetrahydrofuran 1599.32
    n-hexyl acetate 1036.33
    isooctane 375.81
    2-(2-butoxyethoxy)ethanol 710.61
    sec-butyl acetate 489.17
    tert-butyl acetate 915.54
    decalin 492.28
    glycerin 185.43
    diglyme 1022.25
    acrylic acid 270.76
    isopropyl myristate 526.9
    n-butyric acid 650.17
    acetyl acetate 618.83
    di(2-ethylhexyl) phthalate 330.68
    ethyl propionate 536.85
    nitromethane 459.75
    1,2-diethoxyethane 965.02
    benzonitrile 415.96
    trioctyl phosphate 294.61
    1-bromopropane 957.15
    gamma-valerolactone 932.64
    n-decanol 523.19
    triethyl phosphate 395.56
    4-methyl-2-pentanol 547.37
    propionitrile 563.87
    vinylene carbonate 457.27
    1,1,2-trichlorotrifluoroethane 532.59
    DMS 528.92
    cumene 388.72
    2-octanol 507.09
    2-hexanone 585.38
    octyl acetate 624.38
    limonene 1018.4
    1,2-dimethoxyethane 737.87
    ethyl orthosilicate 437.05
    tributyl phosphate 363.46
    diacetone alcohol 610.13
    N,N-dimethylaniline 438.8
    acrylonitrile 431.6
    aniline 555.2
    1,3-propanediol 319.07
    bromobenzene 745.02
    dibromomethane 995.54
    1,1,2,2-tetrachloroethane 931.09
    2-methyl-cyclohexyl acetate 756.67
    tetrabutyl urea 405.26
    diisobutyl methanol 634.14
    2-phenylethanol 618.0
    styrene 454.57
    dioctyl adipate 468.44
    dimethyl sulfate 273.94
    ethyl butyrate 825.65
    methyl lactate 244.65
    butyl lactate 409.19
    diethyl carbonate 507.04
    propanediol butyl ether 446.55
    triethyl orthoformate 704.43
    p-tert-butyltoluene 590.17
    methyl 4-tert-butylbenzoate 597.61
    morpholine 1145.77
    tert-butylamine 817.62
    n-dodecanol 419.45
    dimethoxymethane 564.76
    ethylene carbonate 479.48
    cyrene 353.11
    2-ethoxyethyl acetate 630.1
    2-ethylhexyl acetate 1116.47
    1,2,4-trichlorobenzene 616.13
    4-methylpyridine 804.1
    dibutyl ether 1078.81
    2,6-dimethyl-4-heptanol 634.14
    DEF 765.19
    dimethyl isosorbide 865.02
    tetrachloroethylene 682.52
    eugenol 413.25
    triacetin 571.96
    span 80 605.46
    1,4-butanediol 129.68
    1,1-dichloroethane 905.99
    2-methyl-1-pentanol 535.16
    methyl formate 213.58
    2-methyl-1-butanol 696.99
    n-decane 432.11
    butyronitrile 689.7
    3,7-dimethyl-1-octanol 799.45
    1-chlorooctane 736.41
    1-chlorotetradecane 340.8
    n-nonane 470.06
    undecane 307.19
    tert-butylcyclohexane 525.69
    cyclooctane 607.49
    cyclopentanol 651.4
    tetrahydropyran 1524.76
    tert-amyl methyl ether 1233.0
    2,5,8-trioxanonane 738.22
    1-hexene 1120.59
    2-isopropoxyethanol 398.88
    2,2,2-trifluoroethanol 163.63
    methyl butyrate 543.76

    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