4-Penten-2-ol

Overview IFRA Botanical Request a quote

  • Identifiers

    CAS number
    625-31-0

    Molecular formula
    C5H10O

    SMILES
    CC(CC=C)O

    Safety labels

    Flammable
    Flammable

    Retention indicies (RI)

    • Carbowax: 1272.0

  • Odor profile

    Fruity 72.61%
    Green 62.05%
    Pungent 43.33%
    Ethereal 33.98%
    Earthy 33.34%
    Sharp 31.46%
    Cheesy 28.99%
    Vegetable 28.18%
    Fermented 27.34%
    Fresh 26.84%

    Scent© AI

  • Properties

    XLogP3-AA
    1.1

    Molecular weight
    86.13 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra fast

    Boiling point est.
    119°C

    Flash point est.
    30.39 ˚C

  • Synonyms

    • 4-PENTEN-2-OL
    • 625-31-0
    • pent-4-en-2-ol
    • 1-Penten-4-ol
    • 4-Hydroxypent-1-ene
    • MFCD00004556
    • EINECS 210-887-8
    • NSC 65447
    • CH2=CHCH2CH(OH)CH3
    • AI3-28609
    • ZHZCYWWNFQUZOR-UHFFFAOYSA-
    • DTXSID10862318
    • 4Hydroxypent1ene
    • 1Penten4ol
    • penten-4-ol
    • NSC65447
    • 4-Penten-2-ol, 99%
    • DTXCID50811103
    • NSC-65447
    • AKOS009158216
    • SY048958
    • CS-0187048
    • NS00043373
    • P1804
    • 4-Penten-2-ol, purum, >=98.0% (GC)
    • D92157
    • EN300-116240
    • 210-887-8

  • Applications

    4‑Penten‑2‑ol (CAS 625‑31‑0) is an unsaturated secondary alcohol bearing a terminal C=C bond and is widely used as a versatile intermediate: it can be selectively oxidized to the enone 4‑penten‑2‑one for assembling pharmaceuticals, fragrances, and agrochemical intermediates; epoxidation of the double bond or dihydroxylation/hydroboration–oxidation affords epoxyalcohols or diols that enable lactone and tetrahydrofuran synthesis or serve as cross‑linkers/reactive diluents for resins and adhesives; hydrogenation or isomerization provides useful saturated derivatives; the hydroxyl group can be transformed into acrylate/maleate esters or urethanes to give multifunctional monomers that retain a pentenyl handle for thiol–ene or hydrosilylation coupling in UV‑curable coatings, inks, and 3D‑printing resins; it is also employed as a substrate in asymmetric catalysis and enzymatic kinetic resolution to access enantiopure building blocks; additionally, in research and analysis, 4‑penten‑2‑ol is used as a model reagent for addition/cleavage chemistry (ozonolysis, post‑oxidation Michael additions) and as a reference compound in chromatography and hydrogen‑bonding studies.

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1135.09
    methanol 1525.79
    isopropanol 720.97
    water 27.23
    ethyl acetate 211.67
    n-propanol 744.38
    acetone 404.45
    n-butanol 678.04
    acetonitrile 231.73
    DMF 386.11
    toluene 39.75
    isobutanol 430.12
    1,4-dioxane 476.87
    methyl acetate 208.01
    THF 788.57
    2-butanone 259.06
    n-pentanol 376.85
    sec-butanol 515.27
    n-hexane 111.3
    ethylene glycol 358.05
    NMP 365.42
    cyclohexane 87.04
    DMSO 395.25
    n-butyl acetate 269.72
    n-octanol 239.17
    chloroform 195.39
    n-propyl acetate 144.87
    acetic acid 693.9
    dichloromethane 139.74
    cyclohexanone 343.17
    propylene glycol 400.78
    isopropyl acetate 127.42
    DMAc 258.94
    2-ethoxyethanol 385.42
    isopentanol 392.84
    n-heptane 132.48
    ethyl formate 143.71
    1,2-dichloroethane 102.45
    n-hexanol 679.15
    2-methoxyethanol 681.01
    isobutyl acetate 106.68
    tetrachloromethane 67.18
    n-pentyl acetate 128.63
    transcutol 959.71
    n-heptanol 217.35
    ethylbenzene 26.0
    MIBK 139.68
    2-propoxyethanol 620.56
    tert-butanol 637.49
    MTBE 299.95
    2-butoxyethanol 289.58
    propionic acid 421.52
    o-xylene 40.6
    formic acid 354.35
    diethyl ether 326.58
    m-xylene 43.43
    p-xylene 38.02
    chlorobenzene 60.2
    dimethyl carbonate 45.95
    n-octane 33.26
    formamide 204.96
    cyclopentanone 369.55
    2-pentanone 240.18
    anisole 83.86
    cyclopentyl methyl ether 299.87
    gamma-butyrolactone 359.64
    1-methoxy-2-propanol 448.38
    pyridine 152.85
    3-pentanone 148.42
    furfural 238.88
    n-dodecane 23.96
    diethylene glycol 475.57
    diisopropyl ether 99.79
    tert-amyl alcohol 453.38
    acetylacetone 171.02
    n-hexadecane 25.08
    acetophenone 76.62
    methyl propionate 151.17
    isopentyl acetate 210.37
    trichloroethylene 152.8
    n-nonanol 193.43
    cyclohexanol 398.87
    benzyl alcohol 98.38
    2-ethylhexanol 309.6
    isooctanol 147.59
    dipropyl ether 280.81
    1,2-dichlorobenzene 55.03
    ethyl lactate 81.37
    propylene carbonate 176.21
    n-methylformamide 247.75
    2-pentanol 377.55
    n-pentane 110.78
    1-propoxy-2-propanol 466.42
    1-methoxy-2-propyl acetate 193.5
    2-(2-methoxypropoxy) propanol 234.07
    mesitylene 33.67
    ε-caprolactone 275.3
    p-cymene 50.07
    epichlorohydrin 254.53
    1,1,1-trichloroethane 103.36
    2-aminoethanol 527.63
    morpholine-4-carbaldehyde 363.53
    sulfolane 325.45
    2,2,4-trimethylpentane 44.8
    2-methyltetrahydrofuran 509.81
    n-hexyl acetate 212.66
    isooctane 36.66
    2-(2-butoxyethoxy)ethanol 342.66
    sec-butyl acetate 90.6
    tert-butyl acetate 143.28
    decalin 31.96
    glycerin 453.91
    diglyme 419.58
    acrylic acid 289.25
    isopropyl myristate 83.85
    n-butyric acid 471.56
    acetyl acetate 112.01
    di(2-ethylhexyl) phthalate 84.63
    ethyl propionate 100.77
    nitromethane 380.56
    1,2-diethoxyethane 271.9
    benzonitrile 92.42
    trioctyl phosphate 72.61
    1-bromopropane 120.05
    gamma-valerolactone 409.63
    n-decanol 144.47
    triethyl phosphate 59.96
    4-methyl-2-pentanol 174.39
    propionitrile 195.32
    vinylene carbonate 131.38
    1,1,2-trichlorotrifluoroethane 237.41
    DMS 96.1
    cumene 30.2
    2-octanol 138.74
    2-hexanone 199.21
    octyl acetate 113.8
    limonene 109.99
    1,2-dimethoxyethane 427.14
    ethyl orthosilicate 68.12
    tributyl phosphate 85.58
    diacetone alcohol 222.01
    N,N-dimethylaniline 65.12
    acrylonitrile 152.74
    aniline 103.01
    1,3-propanediol 573.69
    bromobenzene 41.33
    dibromomethane 112.71
    1,1,2,2-tetrachloroethane 144.53
    2-methyl-cyclohexyl acetate 124.14
    tetrabutyl urea 104.79
    diisobutyl methanol 136.82
    2-phenylethanol 151.47
    styrene 30.84
    dioctyl adipate 106.97
    dimethyl sulfate 65.41
    ethyl butyrate 142.39
    methyl lactate 119.69
    butyl lactate 128.32
    diethyl carbonate 75.08
    propanediol butyl ether 294.12
    triethyl orthoformate 109.85
    p-tert-butyltoluene 51.41
    methyl 4-tert-butylbenzoate 113.03
    morpholine 567.09
    tert-butylamine 416.17
    n-dodecanol 110.67
    dimethoxymethane 235.91
    ethylene carbonate 123.68
    cyrene 155.56
    2-ethoxyethyl acetate 144.11
    2-ethylhexyl acetate 162.27
    1,2,4-trichlorobenzene 68.79
    4-methylpyridine 137.84
    dibutyl ether 194.07
    2,6-dimethyl-4-heptanol 136.82
    DEF 213.53
    dimethyl isosorbide 285.59
    tetrachloroethylene 121.96
    eugenol 127.34
    triacetin 147.57
    span 80 258.61
    1,4-butanediol 246.2
    1,1-dichloroethane 120.59
    2-methyl-1-pentanol 251.82
    methyl formate 148.45
    2-methyl-1-butanol 386.46
    n-decane 40.88
    butyronitrile 244.83
    3,7-dimethyl-1-octanol 198.27
    1-chlorooctane 97.62
    1-chlorotetradecane 42.34
    n-nonane 43.17
    undecane 29.95
    tert-butylcyclohexane 39.77
    cyclooctane 32.18
    cyclopentanol 448.35
    tetrahydropyran 506.93
    tert-amyl methyl ether 221.63
    2,5,8-trioxanonane 328.24
    1-hexene 196.38
    2-isopropoxyethanol 255.9
    2,2,2-trifluoroethanol 171.52
    methyl butyrate 141.09

    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

Botanical

Name CAS Botanical Proportion
Annual wormwood (Yugoslavia) 84775-74-6 Artemisia annua L., fam. Asteraceae (Compositae) 0.01%