2,3-Dihydrofuran

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  • Identifiers

    CAS number
    1191-99-7

    Molecular formula
    C4H6O

    SMILES
    C1COC=C1

    Safety labels

    Flammable
    Flammable

  • Odor profile

    Fragrance
    Sweet 73.74%
    Ethereal 50.61%
    Pungent 37.14%
    Spicy 36.31%
    Fruity 35.35%
    Solvent 30.06%
    Nutty 29.03%
    Aromatic 28.76%
    Herbal 26.19%
    Anisic 25.59%

     

    Flavor
    Shrimp 21.52%
    Caramel 21.33%
    Warm 20.58%
    Cauliflower 19.98%
    Alkaline 19.64%
    Sweet 19.5%
    Animal 19.34%
    Beet 18.41%
    Naphthalic 18.37%
    Clam 18.24%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    0.8

    pKa est.
    6.34 (neutral)

    Molecular weight
    70.09 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra fast

    Boiling point est.
    53°C

    Flash point

    • -14.83 ˚C est.

  • Synonyms

    • 2,3-Dihydrofuran
    • 1191-99-7
    • Furan, 2,3-dihydro-
    • 4,5-Dihydrofuran
    • 07M2EY3BG1
    • NSC-85221
    • DTXSID9061594
    • CHEBI:51662
    • RefChem:81727
    • GlyTouCan:G01181OY
    • DTXCID7033492
    • G01181OY
    • 214-747-7
    • 2,3 dihydrofuran
    • 2,3-DHF
    • MFCD00003205
    • 36312-17-1
    • Furan, dihydro-
    • 4,5-Dihydrofuran; NSC 85221;
    • 2,3dihydrofuran
    • Furan,3-dihydro-
    • 2,3-dihydrofurane
    • EINECS 214-747-7
    • 2,3-dihydro-furan
    • NSC 85221
    • SCHEMBL3792
    • 2,3-Dihydrofuran, 99%
    • UNII-07M2EY3BG1
    • SCHEMBL16851
    • SCHEMBL23028
    • SCHEMBL235285
    • SCHEMBL235972
    • orb1710693
    • SCHEMBL1151169
    • SCHEMBL15671661
    • SCHEMBL20562474
    • SCHEMBL20587826
    • BB_SC-06597
    • NSC85221
    • STR04249
    • STL146450
    • AKOS000121127
    • FD139264
    • PD065538
    • DB-038056
    • CS-0015741
    • D1415
    • NS00023841
    • EN300-26572
    • F051266
    • Q2813778
    • F0001-0314
    • InChI=1/C4H6O/c1-2-4-5-3-1/h1,3H,2,4H
    • 1191-99-7

  • Applications

    2,3-Dihydrofuran (CAS 1191-99-7) is a building block and solvent used in organic synthesis and various industrial processes; it also serves as a precursor for certain heterocyclic compounds and related derivatives. In fragrance and flavor chemistry, it is considered as a precursor for aroma compounds; in coatings, inks, and cleaning formulations, it can function as a solvent or reactive diluent to improve dissolution and processability. It is also explored as a monomer or processing additive in polymers and specialty coatings, subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 862.11
    methanol 986.75
    isopropanol 553.83
    water 55.91
    ethyl acetate 205.34
    n-propanol 532.05
    acetone 478.95
    n-butanol 378.76
    acetonitrile 459.29
    DMF 808.82
    toluene 73.84
    isobutanol 309.86
    1,4-dioxane 428.91
    methyl acetate 306.5
    THF 463.98
    2-butanone 309.7
    n-pentanol 256.82
    sec-butanol 365.12
    n-hexane 32.19
    ethylene glycol 586.87
    NMP 471.82
    cyclohexane 45.16
    DMSO 718.89
    n-butyl acetate 129.95
    n-octanol 119.63
    chloroform 532.76
    n-propyl acetate 127.76
    acetic acid 1210.39
    dichloromethane 424.63
    cyclohexanone 211.19
    propylene glycol 621.45
    isopropyl acetate 100.98
    DMAc 591.79
    2-ethoxyethanol 464.24
    isopentanol 228.24
    n-heptane 40.47
    ethyl formate 134.77
    1,2-dichloroethane 217.63
    n-hexanol 244.55
    2-methoxyethanol 737.95
    isobutyl acetate 74.64
    tetrachloromethane 99.93
    n-pentyl acetate 69.16
    transcutol 916.58
    n-heptanol 101.24
    ethylbenzene 37.2
    MIBK 94.97
    2-propoxyethanol 441.89
    tert-butanol 429.51
    MTBE 196.84
    2-butoxyethanol 215.11
    propionic acid 506.8
    o-xylene 60.69
    formic acid 619.36
    diethyl ether 241.01
    m-xylene 53.83
    p-xylene 48.62
    chlorobenzene 99.73
    dimethyl carbonate 108.0
    n-octane 12.14
    formamide 525.63
    cyclopentanone 310.6
    2-pentanone 187.28
    anisole 125.63
    cyclopentyl methyl ether 192.54
    gamma-butyrolactone 310.49
    1-methoxy-2-propanol 492.25
    pyridine 317.03
    3-pentanone 162.24
    furfural 299.71
    n-dodecane 12.4
    diethylene glycol 507.77
    diisopropyl ether 55.04
    tert-amyl alcohol 285.05
    acetylacetone 169.91
    n-hexadecane 12.9
    acetophenone 109.71
    methyl propionate 206.64
    isopentyl acetate 96.36
    trichloroethylene 372.66
    n-nonanol 100.28
    cyclohexanol 229.36
    benzyl alcohol 146.61
    2-ethylhexanol 112.29
    isooctanol 72.3
    dipropyl ether 142.76
    1,2-dichlorobenzene 84.66
    ethyl lactate 111.22
    propylene carbonate 143.52
    n-methylformamide 460.79
    2-pentanol 226.7
    n-pentane 47.75
    1-propoxy-2-propanol 295.78
    1-methoxy-2-propyl acetate 146.21
    2-(2-methoxypropoxy) propanol 220.17
    mesitylene 33.05
    ε-caprolactone 176.35
    p-cymene 39.57
    epichlorohydrin 306.35
    1,1,1-trichloroethane 209.44
    2-aminoethanol 739.74
    morpholine-4-carbaldehyde 473.54
    sulfolane 343.51
    2,2,4-trimethylpentane 21.13
    2-methyltetrahydrofuran 300.47
    n-hexyl acetate 112.09
    isooctane 14.38
    2-(2-butoxyethoxy)ethanol 300.73
    sec-butyl acetate 72.61
    tert-butyl acetate 96.62
    decalin 18.18
    glycerin 668.16
    diglyme 437.49
    acrylic acid 543.43
    isopropyl myristate 50.14
    n-butyric acid 330.99
    acetyl acetate 127.68
    di(2-ethylhexyl) phthalate 61.99
    ethyl propionate 103.19
    nitromethane 780.62
    1,2-diethoxyethane 189.41
    benzonitrile 122.38
    trioctyl phosphate 43.63
    1-bromopropane 161.95
    gamma-valerolactone 337.19
    n-decanol 75.69
    triethyl phosphate 49.74
    4-methyl-2-pentanol 98.65
    propionitrile 254.76
    vinylene carbonate 136.22
    1,1,2-trichlorotrifluoroethane 467.51
    DMS 106.4
    cumene 32.25
    2-octanol 61.15
    2-hexanone 134.74
    octyl acetate 72.13
    limonene 65.79
    1,2-dimethoxyethane 378.68
    ethyl orthosilicate 50.24
    tributyl phosphate 51.77
    diacetone alcohol 175.0
    N,N-dimethylaniline 96.24
    acrylonitrile 321.08
    aniline 184.36
    1,3-propanediol 537.52
    bromobenzene 81.25
    dibromomethane 282.54
    1,1,2,2-tetrachloroethane 324.26
    2-methyl-cyclohexyl acetate 76.63
    tetrabutyl urea 73.43
    diisobutyl methanol 59.71
    2-phenylethanol 135.6
    styrene 55.92
    dioctyl adipate 82.67
    dimethyl sulfate 143.76
    ethyl butyrate 95.73
    methyl lactate 188.15
    butyl lactate 86.2
    diethyl carbonate 65.04
    propanediol butyl ether 268.23
    triethyl orthoformate 71.09
    p-tert-butyltoluene 39.65
    methyl 4-tert-butylbenzoate 102.01
    morpholine 562.78
    tert-butylamine 273.07
    n-dodecanol 61.57
    dimethoxymethane 313.37
    ethylene carbonate 106.67
    cyrene 163.97
    2-ethoxyethyl acetate 121.5
    2-ethylhexyl acetate 74.59
    1,2,4-trichlorobenzene 117.27
    4-methylpyridine 206.05
    dibutyl ether 85.4
    2,6-dimethyl-4-heptanol 59.71
    DEF 238.32
    dimethyl isosorbide 210.59
    tetrachloroethylene 243.14
    eugenol 125.02
    triacetin 147.5
    span 80 199.69
    1,4-butanediol 297.94
    1,1-dichloroethane 269.08
    2-methyl-1-pentanol 163.55
    methyl formate 261.39
    2-methyl-1-butanol 242.9
    n-decane 18.39
    butyronitrile 193.55
    3,7-dimethyl-1-octanol 99.37
    1-chlorooctane 54.26
    1-chlorotetradecane 25.76
    n-nonane 17.67
    undecane 14.47
    tert-butylcyclohexane 18.86
    cyclooctane 15.37
    cyclopentanol 297.74
    tetrahydropyran 305.83
    tert-amyl methyl ether 150.81
    2,5,8-trioxanonane 344.3
    1-hexene 87.23
    2-isopropoxyethanol 280.09
    2,2,2-trifluoroethanol 374.12
    methyl butyrate 125.52

    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