5-Ethylthiazole

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  • Identifiers

    CAS number
    17626-73-2

    Molecular formula
    C5H7NS

    SMILES
    CCC1=CN=CS1

    Safety labels

  • Odor profile

    Fragrance
    Green 79.41%
    Nutty 73.08%
    Roasted 59.25%
    Vegetable 58.54%
    Meaty 52.74%
    Sulfurous 42.92%
    Cocoa 40.97%
    Coffee 40.85%
    Earthy 39.91%
    Burnt 39.52%

     

    Flavor
    Nutty 74.25%
    Green 70.56%
    Vegetable 46.98%
    Roasted 42.07%
    Earthy 39.47%
    Fatty 33.24%
    Meaty 33.1%
    Sweet 32.56%
    Peanut 32.39%
    Coffee 31.57%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    1.8

    pKa est.
    5.61 (weak acid)

    Molecular weight
    113.18 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Fast

    Boiling point est.
    178°C

    Flash point

    • 47.19 ˚C est.

  • Synonyms

    • 5-Ethylthiazole
    • Thiazole, 5-ethyl-
    • 17626-73-2
    • RefChem:102585
    • ASAMCDOTLOUAAR-UHFFFAOYSA-N
    • 5-Ethyl-1,3-thiazole
    • 5-Ethyl-1,3-thiazole #
    • SCHEMBL126590
    • SCHEMBL289270
    • SCHEMBL469221
    • SCHEMBL743831
    • SCHEMBL5000132
    • SCHEMBL9902564
    • DTXSID601316975
    • NS00113952
    • 17626-73-2

  • Applications

    5-Ethylthiazole (CAS 17626-73-2) is mainly used as an odorant in perfumery and cosmetics, contributing roasted and nutty notes; it is also used as a flavoring ingredient in food processing and beverages to enhance roasted or meat-like profiles; in household products and cleaners it serves as a fragrance additive; in industrial manufacturing it is commonly used as an intermediate for the synthesis of pharmaceutical and agrochemical building blocks.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 99.81
    methanol 125.18
    isopropanol 62.71
    water 1.34
    ethyl acetate 124.35
    n-propanol 80.34
    acetone 172.51
    n-butanol 87.84
    acetonitrile 109.41
    DMF 204.62
    toluene 113.13
    isobutanol 59.69
    1,4-dioxane 266.59
    methyl acetate 118.66
    THF 311.47
    2-butanone 129.66
    n-pentanol 75.1
    sec-butanol 58.25
    n-hexane 8.77
    ethylene glycol 25.73
    NMP 294.1
    cyclohexane 20.23
    DMSO 236.99
    n-butyl acetate 165.8
    n-octanol 48.64
    chloroform 465.29
    n-propyl acetate 102.5
    acetic acid 175.54
    dichloromethane 377.33
    cyclohexanone 265.35
    propylene glycol 27.27
    isopropyl acetate 79.01
    DMAc 144.76
    2-ethoxyethanol 111.89
    isopentanol 75.48
    n-heptane 18.87
    ethyl formate 104.17
    1,2-dichloroethane 213.61
    n-hexanol 99.37
    2-methoxyethanol 154.21
    isobutyl acetate 74.44
    tetrachloromethane 104.54
    n-pentyl acetate 96.78
    transcutol 463.35
    n-heptanol 55.28
    ethylbenzene 43.65
    MIBK 82.77
    2-propoxyethanol 160.72
    tert-butanol 81.49
    MTBE 75.33
    2-butoxyethanol 105.18
    propionic acid 95.25
    o-xylene 65.23
    formic acid 70.75
    diethyl ether 104.67
    m-xylene 72.63
    p-xylene 64.62
    chlorobenzene 208.5
    dimethyl carbonate 50.59
    n-octane 7.38
    formamide 94.31
    cyclopentanone 282.17
    2-pentanone 119.94
    anisole 111.18
    cyclopentyl methyl ether 142.67
    gamma-butyrolactone 290.72
    1-methoxy-2-propanol 102.69
    pyridine 280.43
    3-pentanone 94.11
    furfural 348.69
    n-dodecane 6.57
    diethylene glycol 118.0
    diisopropyl ether 37.85
    tert-amyl alcohol 66.42
    acetylacetone 151.5
    n-hexadecane 7.75
    acetophenone 116.01
    methyl propionate 88.58
    isopentyl acetate 136.35
    trichloroethylene 477.11
    n-nonanol 47.28
    cyclohexanol 86.43
    benzyl alcohol 93.95
    2-ethylhexanol 71.4
    isooctanol 48.13
    dipropyl ether 90.68
    1,2-dichlorobenzene 183.2
    ethyl lactate 50.19
    propylene carbonate 172.92
    n-methylformamide 110.56
    2-pentanol 56.84
    n-pentane 11.83
    1-propoxy-2-propanol 124.33
    1-methoxy-2-propyl acetate 144.94
    2-(2-methoxypropoxy) propanol 119.59
    mesitylene 50.41
    ε-caprolactone 201.75
    p-cymene 50.14
    epichlorohydrin 274.58
    1,1,1-trichloroethane 262.96
    2-aminoethanol 48.87
    morpholine-4-carbaldehyde 277.58
    sulfolane 319.0
    2,2,4-trimethylpentane 10.36
    2-methyltetrahydrofuran 209.06
    n-hexyl acetate 111.83
    isooctane 9.21
    2-(2-butoxyethoxy)ethanol 155.43
    sec-butyl acetate 66.8
    tert-butyl acetate 97.39
    decalin 14.65
    glycerin 51.14
    diglyme 267.75
    acrylic acid 103.06
    isopropyl myristate 53.97
    n-butyric acid 133.2
    acetyl acetate 98.57
    di(2-ethylhexyl) phthalate 60.77
    ethyl propionate 73.25
    nitromethane 265.64
    1,2-diethoxyethane 182.81
    benzonitrile 167.43
    trioctyl phosphate 42.54
    1-bromopropane 115.5
    gamma-valerolactone 350.85
    n-decanol 37.47
    triethyl phosphate 58.36
    4-methyl-2-pentanol 40.66
    propionitrile 90.6
    vinylene carbonate 190.48
    1,1,2-trichlorotrifluoroethane 207.74
    DMS 96.05
    cumene 37.85
    2-octanol 38.19
    2-hexanone 104.33
    octyl acetate 65.39
    limonene 72.53
    1,2-dimethoxyethane 169.87
    ethyl orthosilicate 57.43
    tributyl phosphate 54.78
    diacetone alcohol 104.32
    N,N-dimethylaniline 78.35
    acrylonitrile 122.59
    aniline 126.22
    1,3-propanediol 74.85
    bromobenzene 228.45
    dibromomethane 249.93
    1,1,2,2-tetrachloroethane 297.35
    2-methyl-cyclohexyl acetate 95.91
    tetrabutyl urea 66.82
    diisobutyl methanol 47.51
    2-phenylethanol 112.14
    styrene 68.05
    dioctyl adipate 76.87
    dimethyl sulfate 93.84
    ethyl butyrate 104.28
    methyl lactate 55.27
    butyl lactate 71.07
    diethyl carbonate 69.67
    propanediol butyl ether 81.38
    triethyl orthoformate 82.15
    p-tert-butyltoluene 49.32
    methyl 4-tert-butylbenzoate 104.78
    morpholine 228.05
    tert-butylamine 55.67
    n-dodecanol 30.42
    dimethoxymethane 128.29
    ethylene carbonate 142.79
    cyrene 129.32
    2-ethoxyethyl acetate 141.62
    2-ethylhexyl acetate 117.79
    1,2,4-trichlorobenzene 213.3
    4-methylpyridine 238.62
    dibutyl ether 72.27
    2,6-dimethyl-4-heptanol 47.51
    DEF 124.62
    dimethyl isosorbide 211.49
    tetrachloroethylene 225.56
    eugenol 114.74
    triacetin 121.14
    span 80 108.48
    1,4-butanediol 39.71
    1,1-dichloroethane 213.42
    2-methyl-1-pentanol 68.85
    methyl formate 93.22
    2-methyl-1-butanol 66.85
    n-decane 10.11
    butyronitrile 106.74
    3,7-dimethyl-1-octanol 55.74
    1-chlorooctane 43.2
    1-chlorotetradecane 20.8
    n-nonane 9.33
    undecane 7.89
    tert-butylcyclohexane 14.29
    cyclooctane 8.83
    cyclopentanol 95.57
    tetrahydropyran 193.72
    tert-amyl methyl ether 64.3
    2,5,8-trioxanonane 212.92
    1-hexene 36.74
    2-isopropoxyethanol 88.36
    2,2,2-trifluoroethanol 79.7
    methyl butyrate 97.75

    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