2-Methyl-4-penten-2-ol

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  • Identifiers

    CAS number
    624-97-5

    Molecular formula
    C6H12O

    SMILES
    CC(C)(CC=C)O

    Safety labels

    Corrosive
    Corrosive

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Herbal 67.5%
    Green 60.3%
    Fruity 56.97%
    Fresh 49.58%
    Floral 44.26%
    Earthy 43.51%
    Mint 33.77%
    Citrus 33.05%
    Lavender 32.47%
    Woody 32.39%

     

    Flavor
    Floral 47.61%
    Oily 42.74%
    Green 39.51%
    Herbal 31.52%
    Tropical 30.81%
    Woody 29.74%
    Citrus 29.71%
    Earthy 27.81%
    Pungent 26.81%
    Lavender 26.12%

     

    Odor impact est.
    Medium

  • Properties

    XLogP3-AA
    1.3

    pKa est.
    9.53 (weak base)

    Molecular weight
    100.16 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra fast

    Boiling point est.
    118°C

    Flash point

    • 27.1 ˚C est.

  • Synonyms

    • 2-Methyl-4-penten-2-ol
    • 624-97-5
    • 4-Penten-2-ol, 2-methyl-
    • CH2=CHCH2C(CH3)2OH
    • 4-Pentene-2-ol, 2-methyl
    • Dimethylallylcarbinol
    • 4-Pentene-2-ol, 2-methyl-
    • UNII-38Q68G4313
    • 4-methyl-1-penten-4-ol
    • ALLYLDIMETHYLCARBINOL
    • 1-Pentene-4-ol, 4-methyl
    • 38Q68G4313
    • DTXSID70211464
    • 2-METHYL-4-PENTENE-2-OL
    • 1,1-DIMETHYL-3-BUTEN-1-OL
    • 4,4-DIMETHYL-1-BUTEN-4-OL
    • RefChem:88147
    • DTXCID70133955
    • UYOPRNGQFQWYER-UHFFFAOYSA-N
    • 2-methylpent-4-en-2-ol
    • 2-methyl-pent-4-en-2-ol
    • MFCD00021813
    • 4-Penten-2-ol,2-methyl-
    • SCHEMBL125434
    • SCHEMBL712940
    • SCHEMBL1061063
    • SCHEMBL9317273
    • SCHEMBL10719570
    • SCHEMBL16950034
    • AKOS006275338
    • SB37980
    • AS-47367
    • SY153545
    • DB-112130
    • CS-0138338
    • EN300-141484
    • F13463
    • F513086
    • Q27256804
    • F2167-9503
    • 624-97-5

  • Applications

    2-Methyl-4-penten-2-ol (CAS 624-97-5) is primarily used as an intermediate in fragrance and cosmetics development, supporting the production of aroma compounds and related fragrance additives. It also serves as a precursor for functionalizing the hydroxyl group to form esters or derivatives used in fragrance and flavor formulations. In the polymers and coatings sector, it can act as a polyol precursor and as a building block with hydroxyl functionality and unsaturation for polyurethane and related systems. It is also employed as a reactive intermediate in the synthesis of other organic compounds and may serve as a component for adhesives and inks formulations. Its applications may extend to household care products and consumer goods, subject to regulatory and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 672.95
    methanol 953.68
    isopropanol 512.9
    water 36.15
    ethyl acetate 192.96
    n-propanol 536.1
    acetone 236.76
    n-butanol 552.4
    acetonitrile 162.97
    DMF 287.4
    toluene 70.69
    isobutanol 375.66
    1,4-dioxane 402.41
    methyl acetate 198.83
    THF 577.89
    2-butanone 242.43
    n-pentanol 332.18
    sec-butanol 502.94
    n-hexane 243.15
    ethylene glycol 257.43
    NMP 332.57
    cyclohexane 152.1
    DMSO 178.99
    n-butyl acetate 211.32
    n-octanol 327.88
    chloroform 242.11
    n-propyl acetate 125.23
    acetic acid 383.98
    dichloromethane 147.02
    cyclohexanone 289.01
    propylene glycol 352.9
    isopropyl acetate 138.24
    DMAc 314.22
    2-ethoxyethanol 339.83
    isopentanol 389.32
    n-heptane 231.88
    ethyl formate 135.46
    1,2-dichloroethane 100.38
    n-hexanol 706.38
    2-methoxyethanol 558.51
    isobutyl acetate 104.29
    tetrachloromethane 97.76
    n-pentyl acetate 148.88
    transcutol 751.98
    n-heptanol 294.15
    ethylbenzene 56.61
    MIBK 145.38
    2-propoxyethanol 649.93
    tert-butanol 585.51
    MTBE 394.46
    2-butoxyethanol 330.34
    propionic acid 329.97
    o-xylene 77.9
    formic acid 232.83
    diethyl ether 346.55
    m-xylene 76.4
    p-xylene 75.64
    chlorobenzene 69.48
    dimethyl carbonate 65.16
    n-octane 71.16
    formamide 120.29
    cyclopentanone 265.14
    2-pentanone 209.9
    anisole 115.0
    cyclopentyl methyl ether 306.12
    gamma-butyrolactone 250.21
    1-methoxy-2-propanol 432.73
    pyridine 135.72
    3-pentanone 172.51
    furfural 188.68
    n-dodecane 49.3
    diethylene glycol 440.93
    diisopropyl ether 153.59
    tert-amyl alcohol 558.46
    acetylacetone 140.25
    n-hexadecane 49.28
    acetophenone 94.07
    methyl propionate 164.02
    isopentyl acetate 189.46
    trichloroethylene 137.67
    n-nonanol 272.92
    cyclohexanol 392.88
    benzyl alcohol 108.84
    2-ethylhexanol 377.17
    isooctanol 201.08
    dipropyl ether 318.8
    1,2-dichlorobenzene 64.8
    ethyl lactate 109.26
    propylene carbonate 159.23
    n-methylformamide 180.8
    2-pentanol 393.45
    n-pentane 224.32
    1-propoxy-2-propanol 491.31
    1-methoxy-2-propyl acetate 205.37
    2-(2-methoxypropoxy) propanol 290.69
    mesitylene 61.55
    ε-caprolactone 274.64
    p-cymene 77.93
    epichlorohydrin 208.01
    1,1,1-trichloroethane 136.12
    2-aminoethanol 401.11
    morpholine-4-carbaldehyde 346.58
    sulfolane 226.69
    2,2,4-trimethylpentane 103.4
    2-methyltetrahydrofuran 442.6
    n-hexyl acetate 269.56
    isooctane 72.25
    2-(2-butoxyethoxy)ethanol 377.54
    sec-butyl acetate 104.13
    tert-butyl acetate 176.57
    decalin 69.46
    glycerin 395.78
    diglyme 443.27
    acrylic acid 218.1
    isopropyl myristate 122.28
    n-butyric acid 357.73
    acetyl acetate 111.35
    di(2-ethylhexyl) phthalate 104.48
    ethyl propionate 124.04
    nitromethane 225.41
    1,2-diethoxyethane 264.67
    benzonitrile 90.79
    trioctyl phosphate 94.03
    1-bromopropane 144.65
    gamma-valerolactone 329.08
    n-decanol 202.05
    triethyl phosphate 79.48
    4-methyl-2-pentanol 221.39
    propionitrile 174.61
    vinylene carbonate 119.27
    1,1,2-trichlorotrifluoroethane 217.99
    DMS 117.25
    cumene 57.96
    2-octanol 202.19
    2-hexanone 175.18
    octyl acetate 158.49
    limonene 149.7
    1,2-dimethoxyethane 388.67
    ethyl orthosilicate 90.9
    tributyl phosphate 108.08
    diacetone alcohol 238.88
    N,N-dimethylaniline 100.27
    acrylonitrile 133.51
    aniline 119.78
    1,3-propanediol 404.48
    bromobenzene 55.2
    dibromomethane 135.47
    1,1,2,2-tetrachloroethane 149.57
    2-methyl-cyclohexyl acetate 154.26
    tetrabutyl urea 136.38
    diisobutyl methanol 171.74
    2-phenylethanol 174.21
    styrene 56.45
    dioctyl adipate 139.3
    dimethyl sulfate 76.19
    ethyl butyrate 145.98
    methyl lactate 136.03
    butyl lactate 152.33
    diethyl carbonate 88.29
    propanediol butyl ether 347.46
    triethyl orthoformate 132.92
    p-tert-butyltoluene 86.62
    methyl 4-tert-butylbenzoate 156.09
    morpholine 482.7
    tert-butylamine 453.74
    n-dodecanol 156.37
    dimethoxymethane 225.76
    ethylene carbonate 118.28
    cyrene 175.2
    2-ethoxyethyl acetate 156.88
    2-ethylhexyl acetate 163.83
    1,2,4-trichlorobenzene 82.87
    4-methylpyridine 151.13
    dibutyl ether 244.67
    2,6-dimethyl-4-heptanol 171.74
    DEF 215.01
    dimethyl isosorbide 309.98
    tetrachloroethylene 120.72
    eugenol 159.46
    triacetin 175.83
    span 80 300.79
    1,4-butanediol 199.39
    1,1-dichloroethane 143.46
    2-methyl-1-pentanol 269.8
    methyl formate 124.18
    2-methyl-1-butanol 411.24
    n-decane 82.51
    butyronitrile 195.63
    3,7-dimethyl-1-octanol 260.09
    1-chlorooctane 146.79
    1-chlorotetradecane 70.53
    n-nonane 89.54
    undecane 60.26
    tert-butylcyclohexane 90.7
    cyclooctane 75.18
    cyclopentanol 372.81
    tetrahydropyran 452.1
    tert-amyl methyl ether 340.57
    2,5,8-trioxanonane 345.57
    1-hexene 292.43
    2-isopropoxyethanol 259.13
    2,2,2-trifluoroethanol 131.83
    methyl butyrate 147.68

    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