2-Ethyl-4,5-dimethylthiazole

Overview IFRA Request a quote

  • Identifiers

    CAS number
    873-64-3

    Molecular formula
    C7H11NS

    SMILES
    CCC1=NC(=C(S1)C)C

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Nutty 81.79%
    Roasted 73.87%
    Meaty 62.16%
    Green 59.95%
    Earthy 57.23%
    Cocoa 54.7%
    Vegetable 51.74%
    Burnt 49.33%
    Coffee 48.66%
    Hazelnut 48.65%

     

    Flavor
    Nutty 71.08%
    Green 65.86%
    Roasted 54.01%
    Vegetable 51.96%
    Earthy 51.63%
    Meaty 38.97%
    Hazelnut 38.87%
    Potato 38.57%
    Burnt 36.32%
    Musty 34.32%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    2.6

    pKa est.
    6.82 (neutral)

    Molecular weight
    141.24 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Fast

    Boiling point est.
    179°C

    Flash point

    • 51.48 ˚C est.

  • Synonyms

    • 2-Ethyl-4,5-dimethylthiazole
    • 873-64-3
    • 2-Ethyl-4,5-dimethyl-1,3-thiazole
    • 4,5-Dimethyl-2-ethylthiazole
    • Thiazole, 2-ethyl-4,5-dimethyl-
    • 34N4WYF56I
    • DTXSID90335095
    • UNII-34N4WYF56I
    • MFCD00053125
    • 2-Ethyl-4,5-dimethylthiazol
    • SCHEMBL115387
    • 4,5-Dimethyl-2-ethyl thiazole
    • DTXCID40286184
    • CHEBI:176698
    • 2-Ethyl-4,5-dimethylthiazole, 97%
    • AKOS006341292
    • 2-Ethyl-4,5-dimethyl-1,3-thiazole #
    • AS-59452
    • CS-0322184
    • E0718
    • NS00114116
    • D90557
    • A842109
    • Q27256372
    • 639-201-9

  • Applications

    2-Ethyl-4,5-dimethylthiazole (CAS 873-64-3) is primarily used as an aroma ingredient and odorant in perfumery and flavor applications, contributing to and adjusting the fragrance profile of products. It also often serves as a precursor in the synthesis of organic compounds containing the thiazole ring, making it a building block for industrial applications related to cosmetics, polymer materials, and coatings and inks. Additionally, owing to its odor characteristics, the compound may be used in personal care products and household cleaning products to improve or impart fragrance, subject to regulatory and formulation constraints.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 417.26
    methanol 610.21
    isopropanol 354.47
    water 5.38
    ethyl acetate 423.13
    n-propanol 415.32
    acetone 586.89
    n-butanol 419.71
    acetonitrile 373.53
    DMF 991.4
    toluene 472.27
    isobutanol 339.32
    1,4-dioxane 929.12
    methyl acetate 457.07
    THF 1069.58
    2-butanone 565.59
    n-pentanol 314.21
    sec-butanol 364.73
    n-hexane 113.47
    ethylene glycol 141.75
    NMP 993.55
    cyclohexane 135.0
    DMSO 679.65
    n-butyl acetate 394.72
    n-octanol 261.77
    chloroform 1623.29
    n-propyl acetate 306.52
    acetic acid 266.64
    dichloromethane 1348.16
    cyclohexanone 898.21
    propylene glycol 176.51
    isopropyl acetate 336.73
    DMAc 850.52
    2-ethoxyethanol 510.86
    isopentanol 347.25
    n-heptane 91.69
    ethyl formate 329.96
    1,2-dichloroethane 785.48
    n-hexanol 386.12
    2-methoxyethanol 781.38
    isobutyl acetate 269.45
    tetrachloromethane 503.83
    n-pentyl acetate 361.69
    transcutol 857.34
    n-heptanol 255.25
    ethylbenzene 288.13
    MIBK 368.17
    2-propoxyethanol 654.77
    tert-butanol 393.57
    MTBE 499.79
    2-butoxyethanol 423.55
    propionic acid 278.4
    o-xylene 356.16
    formic acid 124.86
    diethyl ether 485.18
    m-xylene 361.87
    p-xylene 399.09
    chlorobenzene 660.23
    dimethyl carbonate 259.8
    n-octane 61.03
    formamide 174.15
    cyclopentanone 957.25
    2-pentanone 489.73
    anisole 577.89
    cyclopentyl methyl ether 644.03
    gamma-butyrolactone 833.06
    1-methoxy-2-propanol 587.33
    pyridine 719.06
    3-pentanone 433.21
    furfural 964.11
    n-dodecane 53.39
    diethylene glycol 444.16
    diisopropyl ether 219.48
    tert-amyl alcohol 378.3
    acetylacetone 584.87
    n-hexadecane 60.57
    acetophenone 488.02
    methyl propionate 389.14
    isopentyl acetate 391.53
    trichloroethylene 1396.31
    n-nonanol 235.65
    cyclohexanol 397.14
    benzyl alcohol 406.96
    2-ethylhexanol 266.87
    isooctanol 222.12
    dipropyl ether 322.73
    1,2-dichlorobenzene 661.68
    ethyl lactate 192.78
    propylene carbonate 484.19
    n-methylformamide 413.0
    2-pentanol 299.34
    n-pentane 98.58
    1-propoxy-2-propanol 418.79
    1-methoxy-2-propyl acetate 423.62
    2-(2-methoxypropoxy) propanol 360.22
    mesitylene 269.05
    ε-caprolactone 661.6
    p-cymene 210.65
    epichlorohydrin 1041.43
    1,1,1-trichloroethane 961.2
    2-aminoethanol 238.62
    morpholine-4-carbaldehyde 1059.62
    sulfolane 1015.02
    2,2,4-trimethylpentane 82.28
    2-methyltetrahydrofuran 804.1
    n-hexyl acetate 474.98
    isooctane 63.55
    2-(2-butoxyethoxy)ethanol 434.57
    sec-butyl acetate 266.14
    tert-butyl acetate 406.96
    decalin 112.13
    glycerin 261.92
    diglyme 809.3
    acrylic acid 253.29
    isopropyl myristate 231.15
    n-butyric acid 382.61
    acetyl acetate 327.59
    di(2-ethylhexyl) phthalate 218.26
    ethyl propionate 302.25
    nitromethane 521.08
    1,2-diethoxyethane 457.31
    benzonitrile 561.74
    trioctyl phosphate 162.75
    1-bromopropane 557.6
    gamma-valerolactone 1155.01
    n-decanol 177.38
    triethyl phosphate 196.93
    4-methyl-2-pentanol 205.56
    propionitrile 403.4
    vinylene carbonate 507.59
    1,1,2-trichlorotrifluoroethane 666.31
    DMS 385.44
    cumene 233.86
    2-octanol 213.15
    2-hexanone 384.78
    octyl acetate 274.01
    limonene 284.86
    1,2-dimethoxyethane 851.93
    ethyl orthosilicate 191.58
    tributyl phosphate 192.1
    diacetone alcohol 391.09
    N,N-dimethylaniline 444.15
    acrylonitrile 448.37
    aniline 465.63
    1,3-propanediol 357.42
    bromobenzene 732.43
    dibromomethane 916.1
    1,1,2,2-tetrachloroethane 1186.55
    2-methyl-cyclohexyl acetate 319.06
    tetrabutyl urea 246.52
    diisobutyl methanol 175.76
    2-phenylethanol 426.59
    styrene 362.03
    dioctyl adipate 272.9
    dimethyl sulfate 431.52
    ethyl butyrate 308.14
    methyl lactate 254.9
    butyl lactate 254.96
    diethyl carbonate 224.97
    propanediol butyl ether 334.54
    triethyl orthoformate 249.97
    p-tert-butyltoluene 228.0
    methyl 4-tert-butylbenzoate 433.1
    morpholine 836.96
    tert-butylamine 300.99
    n-dodecanol 142.3
    dimethoxymethane 727.49
    ethylene carbonate 403.37
    cyrene 404.23
    2-ethoxyethyl acetate 439.41
    2-ethylhexyl acetate 350.13
    1,2,4-trichlorobenzene 772.21
    4-methylpyridine 859.79
    dibutyl ether 318.97
    2,6-dimethyl-4-heptanol 175.76
    DEF 588.33
    dimethyl isosorbide 614.0
    tetrachloroethylene 850.3
    eugenol 424.62
    triacetin 398.56
    span 80 320.86
    1,4-butanediol 184.45
    1,1-dichloroethane 840.57
    2-methyl-1-pentanol 306.85
    methyl formate 369.09
    2-methyl-1-butanol 354.88
    n-decane 80.22
    butyronitrile 443.46
    3,7-dimethyl-1-octanol 252.84
    1-chlorooctane 259.28
    1-chlorotetradecane 119.35
    n-nonane 80.8
    undecane 63.17
    tert-butylcyclohexane 121.73
    cyclooctane 76.16
    cyclopentanol 438.46
    tetrahydropyran 681.69
    tert-amyl methyl ether 433.76
    2,5,8-trioxanonane 556.67
    1-hexene 261.84
    2-isopropoxyethanol 375.17
    2,2,2-trifluoroethanol 176.33
    methyl butyrate 376.21

    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