2-Methylcyclopentanone

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  • Identifiers

    CAS number
    1120-72-5

    Molecular formula
    C6H10O

    SMILES
    CC1CCCC1=O

    Safety labels

    Flammable
    Flammable

  • Odor profile

    Fragrance
    Mint 70.35%
    Ketonic 59.44%
    Camphoreous 50.5%
    Herbal 48.04%
    Solvent 40.21%
    Musty 38.91%
    Woody 36.23%
    Tobacco 34.14%
    Caramellic 33.6%
    Cooling 32.9%

     

    Flavor
    Minty 61.27%
    Camphor 26.23%
    Mint 23.85%
    Medicinal 23.23%
    Caramel 23.01%
    Herbal 22.73%
    Fruity 22.09%
    Coumarin 20.73%
    Cistus 20.47%
    Thujone 20.4%

     

    Odor impact est.
    Medium

  • Properties

    XLogP3-AA
    1.0

    pKa est.
    8.06 (weak base)

    Molecular weight
    98.14 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra fast

    Boiling point est.
    149°C

    Flash point

    • 33.65 ˚C est.

  • Synonyms

    • 2-METHYLCYCLOPENTANONE
    • 1120-72-5
    • Cyclopentanone, 2-methyl-
    • alpha-Methylcyclopentanone
    • HTH47R9TXS
    • methyl cyclopentanone
    • EINECS 214-318-4
    • NSC 105429
    • NSC-105429
    • AI3-39196
    • DTXSID50862554
    • RefChem:476030
    • DTXCID40811298
    • CYCLOPENTANONE, 2-METHYL-, (+-)-
    • 214-318-4
    • 2-Methylcyclopentan-1-one
    • MFCD00001414
    • .alpha.-Methylcyclopentanone
    • 28631-88-1
    • Cyclopentanone, methyl-
    • 2-METHYLCYCLOPENTANONE (D3-METHYL)
    • Cyclopentan-1-one, 2-methyl-
    • methylcyclopentanone
    • 2-methyl cyclopentanone
    • UNII-HTH47R9TXS
    • 3-methyl-2-cyclopentanone
    • 2-methyl-cyclopentan-1-one
    • 2-Methylcyclopentanone, 98%
    • SCHEMBL106582
    • (rac)-2-methyl-cyclopentanone
    • orb3023402
    • SCHEMBL6348731
    • SCHEMBL9129871
    • SCHEMBL19716076
    • CHEBI:195393
    • BBL102758
    • NSC105429
    • STL556564
    • AKOS005259854
    • EBC-618145
    • MSK169611-5000B
    • SY045483
    • NS00045150
    • CYCLOPENTANONE, 2-METHYL-, (+/-)-
    • EN300-69526
    • F217631
    • 2-Methylcyclopentanone Solution in Acetone, 5000ug/mL
    • F9995-1299
    • Z813018382
    • 1120-72-5

  • Applications

    2-Methylcyclopentanone (CAS 1120-72-5) is a versatile chemical with multiple industrial applications, commonly used as an odor-active intermediate in fragrance and perfume synthesis. It can also function as a ketone solvent or processing solvent in coatings, inks, and adhesive formulations. As a synthetic building block, it is utilized to access cyclic ketone derivatives and other specialty intermediates for polymer and plastic material development. Additionally, it may be evaluated for use in industrial cleaning formulations and related processing where ketone solvents are appropriate.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1307.54
    methanol 1939.58
    isopropanol 879.66
    water 43.01
    ethyl acetate 724.44
    n-propanol 828.92
    acetone 776.89
    n-butanol 686.3
    acetonitrile 1325.59
    DMF 739.36
    toluene 240.11
    isobutanol 592.57
    1,4-dioxane 901.83
    methyl acetate 821.09
    THF 698.2
    2-butanone 588.4
    n-pentanol 495.25
    sec-butanol 645.17
    n-hexane 47.89
    ethylene glycol 336.46
    NMP 430.99
    cyclohexane 36.69
    DMSO 512.36
    n-butyl acetate 411.72
    n-octanol 288.09
    chloroform 2508.88
    n-propyl acetate 420.65
    acetic acid 1538.08
    dichloromethane 1582.07
    cyclohexanone 498.47
    propylene glycol 438.33
    isopropyl acetate 425.6
    DMAc 615.05
    2-ethoxyethanol 729.93
    isopentanol 660.52
    n-heptane 29.06
    ethyl formate 554.79
    1,2-dichloroethane 608.55
    n-hexanol 431.52
    2-methoxyethanol 1005.5
    isobutyl acetate 291.79
    tetrachloromethane 461.34
    n-pentyl acetate 352.58
    transcutol 2432.14
    n-heptanol 307.83
    ethylbenzene 162.01
    MIBK 346.17
    2-propoxyethanol 637.38
    tert-butanol 869.04
    MTBE 510.29
    2-butoxyethanol 591.83
    propionic acid 877.62
    o-xylene 174.71
    formic acid 757.61
    diethyl ether 415.18
    m-xylene 158.6
    p-xylene 278.81
    chlorobenzene 455.93
    dimethyl carbonate 201.13
    n-octane 18.29
    formamide 1045.14
    cyclopentanone 613.01
    2-pentanone 420.78
    anisole 441.91
    cyclopentyl methyl ether 270.08
    gamma-butyrolactone 829.45
    1-methoxy-2-propanol 685.6
    pyridine 982.56
    3-pentanone 259.8
    furfural 996.9
    n-dodecane 18.22
    diethylene glycol 538.92
    diisopropyl ether 145.73
    tert-amyl alcohol 641.75
    acetylacetone 546.88
    n-hexadecane 19.56
    acetophenone 405.52
    methyl propionate 419.42
    isopentyl acetate 405.97
    trichloroethylene 1611.06
    n-nonanol 246.08
    cyclohexanol 325.41
    benzyl alcohol 445.05
    2-ethylhexanol 242.23
    isooctanol 265.52
    dipropyl ether 159.78
    1,2-dichlorobenzene 422.82
    ethyl lactate 220.87
    propylene carbonate 553.9
    n-methylformamide 767.17
    2-pentanol 427.69
    n-pentane 44.16
    1-propoxy-2-propanol 457.3
    1-methoxy-2-propyl acetate 362.96
    2-(2-methoxypropoxy) propanol 474.78
    mesitylene 109.15
    ε-caprolactone 552.57
    p-cymene 115.62
    epichlorohydrin 849.48
    1,1,1-trichloroethane 984.25
    2-aminoethanol 722.41
    morpholine-4-carbaldehyde 758.24
    sulfolane 543.86
    2,2,4-trimethylpentane 42.3
    2-methyltetrahydrofuran 523.89
    n-hexyl acetate 453.62
    isooctane 36.36
    2-(2-butoxyethoxy)ethanol 687.94
    sec-butyl acetate 304.67
    tert-butyl acetate 403.07
    decalin 36.48
    glycerin 505.63
    diglyme 1133.82
    acrylic acid 797.88
    isopropyl myristate 154.43
    n-butyric acid 1053.96
    acetyl acetate 512.49
    di(2-ethylhexyl) phthalate 179.66
    ethyl propionate 296.03
    nitromethane 1815.2
    1,2-diethoxyethane 568.95
    benzonitrile 702.29
    trioctyl phosphate 113.78
    1-bromopropane 351.72
    gamma-valerolactone 887.22
    n-decanol 168.06
    triethyl phosphate 128.86
    4-methyl-2-pentanol 314.19
    propionitrile 734.06
    vinylene carbonate 610.03
    1,1,2-trichlorotrifluoroethane 883.11
    DMS 322.93
    cumene 141.89
    2-octanol 212.52
    2-hexanone 374.7
    octyl acetate 201.15
    limonene 127.2
    1,2-dimethoxyethane 779.58
    ethyl orthosilicate 139.08
    tributyl phosphate 146.71
    diacetone alcohol 463.34
    N,N-dimethylaniline 271.63
    acrylonitrile 1030.37
    aniline 465.84
    1,3-propanediol 753.45
    bromobenzene 421.31
    dibromomethane 882.52
    1,1,2,2-tetrachloroethane 1140.3
    2-methyl-cyclohexyl acetate 237.89
    tetrabutyl urea 146.05
    diisobutyl methanol 152.74
    2-phenylethanol 392.79
    styrene 228.77
    dioctyl adipate 212.72
    dimethyl sulfate 236.7
    ethyl butyrate 300.7
    methyl lactate 257.24
    butyl lactate 293.03
    diethyl carbonate 219.15
    propanediol butyl ether 548.55
    triethyl orthoformate 207.78
    p-tert-butyltoluene 104.83
    methyl 4-tert-butylbenzoate 339.03
    morpholine 854.34
    tert-butylamine 556.09
    n-dodecanol 118.3
    dimethoxymethane 386.4
    ethylene carbonate 436.97
    cyrene 280.45
    2-ethoxyethyl acetate 504.4
    2-ethylhexyl acetate 282.17
    1,2,4-trichlorobenzene 489.6
    4-methylpyridine 828.37
    dibutyl ether 244.91
    2,6-dimethyl-4-heptanol 152.74
    DEF 392.97
    dimethyl isosorbide 507.57
    tetrachloroethylene 907.41
    eugenol 403.34
    triacetin 448.08
    span 80 405.64
    1,4-butanediol 360.2
    1,1-dichloroethane 938.33
    2-methyl-1-pentanol 485.97
    methyl formate 493.97
    2-methyl-1-butanol 558.41
    n-decane 30.9
    butyronitrile 693.3
    3,7-dimethyl-1-octanol 292.9
    1-chlorooctane 136.19
    1-chlorotetradecane 51.71
    n-nonane 27.8
    undecane 22.67
    tert-butylcyclohexane 49.17
    cyclooctane 14.84
    cyclopentanol 382.52
    tetrahydropyran 462.7
    tert-amyl methyl ether 309.02
    2,5,8-trioxanonane 688.8
    1-hexene 192.2
    2-isopropoxyethanol 523.28
    2,2,2-trifluoroethanol 579.25
    methyl butyrate 426.25

    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