5-Ethyl-4-methyloxazole

Overview IFRA Request a quote

  • Identifiers

    CAS number
    29584-92-7

    Molecular formula
    C6H9NO

    SMILES
    CCC1=C(N=CO1)C

    Safety labels

  • Odor profile

    Fragrance
    Green 78.03%
    Nutty 69.35%
    Roasted 64.09%
    Earthy 55.44%
    Vegetable 54.14%
    Musty 46.6%
    Burnt 43.04%
    Cocoa 42.58%
    Meaty 41.66%
    Hazelnut 39.41%

     

    Flavor
    Nutty 64.52%
    Green 57.19%
    Earthy 50.2%
    Roasted 48.8%
    Vegetable 42.98%
    Coffee 37.41%
    Burnt 37.06%
    Potato 36.4%
    Raw 32.59%
    Musty 31.23%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    1.6

    pKa est.
    6.62 (neutral)

    Molecular weight
    111.14 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Very fast

    Boiling point est.
    158°C

    Flash point

    • 39.51 ˚C est.

  • Synonyms

    • 5-Ethyl-4-methyloxazole
    • Oxazole, 5-ethyl-4-methyl-
    • 5-ethyl-4-methyl-1,3-oxazole
    • 29584-92-7
    • B3YCP63VVC
    • DTXSID80183764
    • RefChem:1072888
    • DTXCID20106255
    • BRN 0970362
    • 4-Methyl-5-ethyloxazole
    • 5-Ethyl-4-methyl-Oxazole
    • Oxazole, 5-ethyl-4-methyl
    • SCHEMBL500889
    • SCHEMBL2628604
    • CHEBI:179311
    • ZLLASJMIAQWDJH-UHFFFAOYSA-N
    • 29584-92-7

  • Applications

    5-Ethyl-4-methyloxazole, CAS 29584-92-7, is primarily used as an intermediate in organic synthesis for pharmaceutical and agrochemical development. It functions as a heteroaryl building block in medicinal chemistry to access drug-like scaffolds and in library synthesis of oxazole-containing compounds. It can serve as a precursor for more complex heterocycles in research and development settings, and is explored as a functional fragment in polymer and materials chemistry for specialty coatings or adhesives. Its use is generally confined to controlled research or production settings and subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1069.69
    methanol 1884.24
    isopropanol 687.17
    water 59.72
    ethyl acetate 402.61
    n-propanol 826.39
    acetone 511.85
    n-butanol 773.62
    acetonitrile 684.85
    DMF 862.39
    toluene 375.03
    isobutanol 707.27
    1,4-dioxane 807.41
    methyl acetate 420.32
    THF 1050.34
    2-butanone 498.11
    n-pentanol 618.09
    sec-butanol 662.58
    n-hexane 152.9
    ethylene glycol 292.76
    NMP 821.59
    cyclohexane 161.35
    DMSO 823.57
    n-butyl acetate 308.65
    n-octanol 196.18
    chloroform 1966.62
    n-propyl acetate 264.38
    acetic acid 829.72
    dichloromethane 2363.84
    cyclohexanone 724.75
    propylene glycol 240.45
    isopropyl acetate 254.13
    DMAc 637.18
    2-ethoxyethanol 739.22
    isopentanol 632.19
    n-heptane 72.98
    ethyl formate 417.59
    1,2-dichloroethane 1072.0
    n-hexanol 371.34
    2-methoxyethanol 1026.29
    isobutyl acetate 189.87
    tetrachloromethane 553.58
    n-pentyl acetate 251.57
    transcutol 1034.2
    n-heptanol 213.66
    ethylbenzene 213.77
    MIBK 286.98
    2-propoxyethanol 549.23
    tert-butanol 701.06
    MTBE 574.41
    2-butoxyethanol 362.76
    propionic acid 509.03
    o-xylene 256.84
    formic acid 688.58
    diethyl ether 620.04
    m-xylene 232.21
    p-xylene 299.57
    chlorobenzene 588.99
    dimethyl carbonate 174.43
    n-octane 39.42
    formamide 823.96
    cyclopentanone 788.65
    2-pentanone 404.68
    anisole 413.57
    cyclopentyl methyl ether 528.71
    gamma-butyrolactone 854.13
    1-methoxy-2-propanol 578.18
    pyridine 856.77
    3-pentanone 352.01
    furfural 926.02
    n-dodecane 29.42
    diethylene glycol 443.36
    diisopropyl ether 183.78
    tert-amyl alcohol 692.71
    acetylacetone 326.56
    n-hexadecane 32.27
    acetophenone 325.56
    methyl propionate 337.09
    isopentyl acetate 294.39
    trichloroethylene 1617.94
    n-nonanol 173.02
    cyclohexanol 549.32
    benzyl alcohol 394.4
    2-ethylhexanol 223.3
    isooctanol 191.94
    dipropyl ether 232.93
    1,2-dichlorobenzene 548.31
    ethyl lactate 139.26
    propylene carbonate 403.41
    n-methylformamide 695.68
    2-pentanol 468.84
    n-pentane 150.33
    1-propoxy-2-propanol 314.12
    1-methoxy-2-propyl acetate 242.13
    2-(2-methoxypropoxy) propanol 270.89
    mesitylene 153.0
    ε-caprolactone 547.88
    p-cymene 130.87
    epichlorohydrin 1105.72
    1,1,1-trichloroethane 936.7
    2-aminoethanol 575.42
    morpholine-4-carbaldehyde 731.27
    sulfolane 934.22
    2,2,4-trimethylpentane 97.89
    2-methyltetrahydrofuran 850.25
    n-hexyl acetate 308.64
    isooctane 58.62
    2-(2-butoxyethoxy)ethanol 379.93
    sec-butyl acetate 194.7
    tert-butyl acetate 283.54
    decalin 86.4
    glycerin 319.29
    diglyme 672.71
    acrylic acid 472.01
    isopropyl myristate 128.52
    n-butyric acid 612.65
    acetyl acetate 236.14
    di(2-ethylhexyl) phthalate 151.13
    ethyl propionate 238.27
    nitromethane 956.66
    1,2-diethoxyethane 422.29
    benzonitrile 567.15
    trioctyl phosphate 101.35
    1-bromopropane 759.98
    gamma-valerolactone 856.0
    n-decanol 125.64
    triethyl phosphate 133.27
    4-methyl-2-pentanol 263.45
    propionitrile 626.53
    vinylene carbonate 432.63
    1,1,2-trichlorotrifluoroethane 637.93
    DMS 238.92
    cumene 168.24
    2-octanol 169.82
    2-hexanone 311.22
    octyl acetate 159.65
    limonene 180.43
    1,2-dimethoxyethane 867.96
    ethyl orthosilicate 141.05
    tributyl phosphate 131.62
    diacetone alcohol 300.81
    N,N-dimethylaniline 314.19
    acrylonitrile 734.7
    aniline 526.93
    1,3-propanediol 647.36
    bromobenzene 617.36
    dibromomethane 1500.36
    1,1,2,2-tetrachloroethane 1153.28
    2-methyl-cyclohexyl acetate 205.83
    tetrabutyl urea 170.12
    diisobutyl methanol 136.09
    2-phenylethanol 299.28
    styrene 289.31
    dioctyl adipate 168.25
    dimethyl sulfate 272.14
    ethyl butyrate 230.62
    methyl lactate 181.27
    butyl lactate 173.42
    diethyl carbonate 171.35
    propanediol butyl ether 254.35
    triethyl orthoformate 175.81
    p-tert-butyltoluene 121.47
    methyl 4-tert-butylbenzoate 274.7
    morpholine 903.3
    tert-butylamine 568.05
    n-dodecanol 96.53
    dimethoxymethane 578.29
    ethylene carbonate 362.91
    cyrene 297.49
    2-ethoxyethyl acetate 301.56
    2-ethylhexyl acetate 237.53
    1,2,4-trichlorobenzene 578.47
    4-methylpyridine 830.8
    dibutyl ether 237.66
    2,6-dimethyl-4-heptanol 136.09
    DEF 481.34
    dimethyl isosorbide 434.53
    tetrachloroethylene 949.93
    eugenol 303.99
    triacetin 229.63
    span 80 224.55
    1,4-butanediol 363.91
    1,1-dichloroethane 1022.28
    2-methyl-1-pentanol 551.87
    methyl formate 502.23
    2-methyl-1-butanol 673.39
    n-decane 47.13
    butyronitrile 686.31
    3,7-dimethyl-1-octanol 205.95
    1-chlorooctane 148.59
    1-chlorotetradecane 65.11
    n-nonane 47.61
    undecane 35.7
    tert-butylcyclohexane 90.28
    cyclooctane 59.63
    cyclopentanol 653.65
    tetrahydropyran 744.43
    tert-amyl methyl ether 460.32
    2,5,8-trioxanonane 461.52
    1-hexene 348.41
    2-isopropoxyethanol 440.22
    2,2,2-trifluoroethanol 340.54
    methyl butyrate 341.62

    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