2-Methyl-5-propylthiophene

Overview IFRA Request a quote

  • Identifiers

    CAS number
    33933-73-2

    Molecular formula
    C8H12S

    SMILES
    CCCC1=CC=C(S1)C

    Safety labels

  • Odor profile

    Fragrance
    Fruity 77.05%
    Sulfurous 67.79%
    Green 63.58%
    Roasted 59.4%
    Burnt 52.49%
    Meaty 49.3%
    Tropical 44.99%
    Alliaceous 41.11%
    Onion 40.12%
    Vegetable 39.56%

     

    Flavor
    Roasted 51.59%
    Nutty 46.35%
    Meaty 38.72%
    Green 37.12%
    Earthy 35.77%
    Coffee 34.29%
    Fruity 34.17%
    Spicy 33.77%
    Sulfury 33.14%
    Vegetable 32.81%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    3.2

    pKa est.
    8.18 (weak base)

    Molecular weight
    140.25 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Fast

    Boiling point est.
    181°C

    Flash point

    • 41.98 ˚C est.

  • Synonyms

    • 2-METHYL-5-PROPYLTHIOPHENE
    • Thiophene, 2-methyl-5-propyl-
    • DTXSID30955519
    • RefChem:263571
    • DTXCID101383511
    • ZWLVQEKJYWHJRM-UHFFFAOYSA-N
    • 33933-73-2
    • SCHEMBL147077
    • SCHEMBL3535370
    • SCHEMBL9481855
    • 33933-73-2

  • Applications

    For 2-Methyl-5-propylthiophene (CAS 33933-73-2), practical applications include fragrance and flavor chemistry as an odorant and aroma precursor for cosmetics, personal care, and household products; used as an ingredient or intermediate in industrial synthesis of fragrance compounds and thiophene derivatives; serves as a building block for thiophene-based polymers and electronic materials; and finds use in coatings/inks and other specialty chemical applications.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 420.36
    methanol 198.8
    isopropanol 442.35
    water 0.16
    ethyl acetate 732.0
    n-propanol 425.85
    acetone 995.26
    n-butanol 541.97
    acetonitrile 505.66
    DMF 759.11
    toluene 940.32
    isobutanol 419.77
    1,4-dioxane 1490.73
    methyl acetate 608.78
    THF 2247.11
    2-butanone 880.22
    n-pentanol 414.56
    sec-butanol 477.25
    n-hexane 327.69
    ethylene glycol 60.05
    NMP 855.14
    cyclohexane 625.49
    DMSO 713.05
    n-butyl acetate 1452.11
    n-octanol 522.57
    chloroform 1797.26
    n-propyl acetate 550.27
    acetic acid 259.88
    dichloromethane 1572.73
    cyclohexanone 1553.4
    propylene glycol 115.4
    isopropyl acetate 522.1
    DMAc 602.22
    2-ethoxyethanol 361.43
    isopentanol 491.89
    n-heptane 665.67
    ethyl formate 384.5
    1,2-dichloroethane 1015.1
    n-hexanol 1191.03
    2-methoxyethanol 456.94
    isobutyl acetate 464.65
    tetrachloromethane 499.26
    n-pentyl acetate 569.07
    transcutol 1126.64
    n-heptanol 459.65
    ethylbenzene 434.14
    MIBK 591.98
    2-propoxyethanol 985.71
    tert-butanol 646.79
    MTBE 865.76
    2-butoxyethanol 474.73
    propionic acid 276.2
    o-xylene 508.31
    formic acid 28.63
    diethyl ether 992.86
    m-xylene 618.98
    p-xylene 508.48
    chlorobenzene 825.27
    dimethyl carbonate 221.08
    n-octane 206.22
    formamide 56.69
    cyclopentanone 1505.23
    2-pentanone 877.29
    anisole 621.01
    cyclopentyl methyl ether 1204.51
    gamma-butyrolactone 1131.23
    1-methoxy-2-propanol 491.41
    pyridine 1062.67
    3-pentanone 659.14
    furfural 791.56
    n-dodecane 146.9
    diethylene glycol 405.95
    diisopropyl ether 413.06
    tert-amyl alcohol 556.27
    acetylacetone 804.9
    n-hexadecane 170.47
    acetophenone 508.08
    methyl propionate 511.4
    isopentyl acetate 1045.31
    trichloroethylene 1560.11
    n-nonanol 443.47
    cyclohexanol 773.98
    benzyl alcohol 374.5
    2-ethylhexanol 854.16
    isooctanol 363.88
    dipropyl ether 1243.93
    1,2-dichlorobenzene 675.18
    ethyl lactate 211.47
    propylene carbonate 729.19
    n-methylformamide 233.72
    2-pentanol 453.49
    n-pentane 312.03
    1-propoxy-2-propanol 886.18
    1-methoxy-2-propyl acetate 843.15
    2-(2-methoxypropoxy) propanol 509.47
    mesitylene 425.75
    ε-caprolactone 1081.48
    p-cymene 466.91
    epichlorohydrin 1168.68
    1,1,1-trichloroethane 1290.43
    2-aminoethanol 128.87
    morpholine-4-carbaldehyde 942.5
    sulfolane 1192.25
    2,2,4-trimethylpentane 148.15
    2-methyltetrahydrofuran 1729.17
    n-hexyl acetate 807.99
    isooctane 145.35
    2-(2-butoxyethoxy)ethanol 642.04
    sec-butyl acetate 407.68
    tert-butyl acetate 646.26
    decalin 257.54
    glycerin 139.37
    diglyme 1080.3
    acrylic acid 199.58
    isopropyl myristate 447.21
    n-butyric acid 505.8
    acetyl acetate 438.68
    di(2-ethylhexyl) phthalate 324.27
    ethyl propionate 438.49
    nitromethane 441.22
    1,2-diethoxyethane 930.35
    benzonitrile 607.6
    trioctyl phosphate 272.53
    1-bromopropane 966.95
    gamma-valerolactone 1254.3
    n-decanol 348.78
    triethyl phosphate 312.62
    4-methyl-2-pentanol 291.3
    propionitrile 499.09
    vinylene carbonate 597.76
    1,1,2-trichlorotrifluoroethane 536.49
    DMS 456.52
    cumene 299.52
    2-octanol 374.12
    2-hexanone 698.62
    octyl acetate 501.1
    limonene 819.7
    1,2-dimethoxyethane 916.39
    ethyl orthosilicate 327.36
    tributyl phosphate 324.36
    diacetone alcohol 561.76
    N,N-dimethylaniline 442.4
    acrylonitrile 426.67
    aniline 556.26
    1,3-propanediol 236.8
    bromobenzene 1032.23
    dibromomethane 1290.74
    1,1,2,2-tetrachloroethane 1227.25
    2-methyl-cyclohexyl acetate 667.39
    tetrabutyl urea 430.61
    diisobutyl methanol 438.06
    2-phenylethanol 593.19
    styrene 518.09
    dioctyl adipate 473.87
    dimethyl sulfate 304.97
    ethyl butyrate 828.14
    methyl lactate 199.28
    butyl lactate 355.95
    diethyl carbonate 460.04
    propanediol butyl ether 421.32
    triethyl orthoformate 547.03
    p-tert-butyltoluene 467.27
    methyl 4-tert-butylbenzoate 502.38
    morpholine 1365.81
    tert-butylamine 495.77
    n-dodecanol 296.29
    dimethoxymethane 648.42
    ethylene carbonate 563.55
    cyrene 471.18
    2-ethoxyethyl acetate 622.48
    2-ethylhexyl acetate 970.99
    1,2,4-trichlorobenzene 728.99
    4-methylpyridine 1170.61
    dibutyl ether 825.75
    2,6-dimethyl-4-heptanol 438.06
    DEF 706.75
    dimethyl isosorbide 918.05
    tetrachloroethylene 772.89
    eugenol 440.56
    triacetin 533.27
    span 80 549.13
    1,4-butanediol 133.11
    1,1-dichloroethane 1142.16
    2-methyl-1-pentanol 394.92
    methyl formate 218.58
    2-methyl-1-butanol 455.33
    n-decane 235.95
    butyronitrile 737.33
    3,7-dimethyl-1-octanol 506.45
    1-chlorooctane 558.99
    1-chlorotetradecane 257.94
    n-nonane 268.24
    undecane 179.7
    tert-butylcyclohexane 231.35
    cyclooctane 303.7
    cyclopentanol 657.37
    tetrahydropyran 1894.33
    tert-amyl methyl ether 644.96
    2,5,8-trioxanonane 801.31
    1-hexene 701.83
    2-isopropoxyethanol 370.42
    2,2,2-trifluoroethanol 89.49
    methyl butyrate 564.66

    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