7-Methylindole

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  • Identifiers

    CAS number
    933-67-5

    Molecular formula
    C9H9N

    SMILES
    CC1=C2C(=CC=C1)C=CN2

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Floral 74.65%
    Animal 60.39%
    Fruity 51.15%
    Sweet 43.6%
    Neroli 37.74%
    Musty 35.31%
    Leathery 33.79%
    Orange 33.76%
    Grape 32.75%
    Burnt 31.59%

     

    Flavor
    Fecal 40.15%
    Animal 35.73%
    Tobacco 32.58%
    Civet 28.55%
    Very strong 27.74%
    Indole 27.72%
    Leather 27.69%
    Medicinal 27.44%
    Phenolic 26.39%
    Bitter 25.79%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    2.6

    pKa est.
    6.96 (neutral)

    Molecular weight
    131.17 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Slow

    Boiling point est.
    255°C

    Flash point

    • 122.81 ˚C est.

  • Synonyms

    • 7-Methylindole
    • 933-67-5
    • 7Z1E6HIT9S
    • NSC-618
    • DTXSID60239374
    • RefChem:546873
    • DTXCID80161865
    • 213-270-1
    • 7-Methyl-1H-indole
    • 1H-Indole, 7-methyl-
    • 7-Methylindol
    • Indole, 7-methyl-
    • MFCD00005684
    • 7-methyl-indole
    • NSC 618
    • CHEMBL326430
    • 7-Methyl-1H-indole; NSC 618
    • UNII-7Z1E6HIT9S
    • EINECS 213-270-1
    • 7-Methylindole, 97%
    • 7-Methyl-1H-indole #
    • BIDD:GT0219
    • SCHEMBL129649
    • SCHEMBL317549
    • SCHEMBL959953
    • 7-Methylindole technical grade
    • NSC618
    • orb3030233
    • SCHEMBL1435658
    • SCHEMBL3585380
    • SCHEMBL4465569
    • SCHEMBL10969893
    • SCHEMBL28878143
    • SCHEMBL29364263
    • AB2914
    • BDBM50232879
    • SBB055973
    • AKOS005202960
    • AB00504
    • CG-0508
    • CS-W007670
    • EBC-459063
    • FM00331
    • HY-W007670
    • FM180753
    • SY005774
    • DB-011507
    • M1702
    • NS00039551
    • ST51021119
    • EN300-74873
    • 933M675
    • F023374
    • Q4642877
    • F0001-2248
    • Z1171217428
    • InChI=1/C9H9N/c1-7-3-2-4-8-5-6-10-9(7)8/h2-6,10H,1H
    • 933-67-5

  • Applications

    7-Methylindole (CAS 933-67-5) is a synthetic building block used in pharmaceutical research as a scaffold for indole-based compounds and related derivatives; in fragrance and cosmetic applications, it is treated as a fragrance intermediate and can serve as a note or precursor in perfumery and personal care formulations; it is also evaluated as a flavor-related intermediate for limited food-context applications; in industrial manufacturing, it functions as a precursor for heterocyclic derivatives and other specialty chemicals used in coatings, adhesives, and dye-related materials, subject to local regulations.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 717.88
    methanol 1231.18
    isopropanol 391.61
    water 4.63
    ethyl acetate 339.46
    n-propanol 511.89
    acetone 552.52
    n-butanol 477.12
    acetonitrile 299.04
    DMF 512.75
    toluene 71.72
    isobutanol 361.37
    1,4-dioxane 418.98
    methyl acetate 244.09
    THF 1273.44
    2-butanone 313.09
    n-pentanol 407.67
    sec-butanol 318.42
    n-hexane 80.54
    ethylene glycol 111.78
    NMP 216.33
    cyclohexane 29.92
    DMSO 329.71
    n-butyl acetate 180.22
    n-octanol 80.32
    chloroform 317.8
    n-propyl acetate 152.52
    acetic acid 292.01
    dichloromethane 357.47
    cyclohexanone 255.52
    propylene glycol 105.13
    isopropyl acetate 155.3
    DMAc 212.6
    2-ethoxyethanol 477.54
    isopentanol 354.65
    n-heptane 42.63
    ethyl formate 212.55
    1,2-dichloroethane 225.51
    n-hexanol 281.18
    2-methoxyethanol 672.1
    isobutyl acetate 118.82
    tetrachloromethane 65.84
    n-pentyl acetate 106.47
    transcutol 701.83
    n-heptanol 104.98
    ethylbenzene 39.84
    MIBK 197.55
    2-propoxyethanol 426.74
    tert-butanol 312.72
    MTBE 302.14
    2-butoxyethanol 195.9
    propionic acid 177.0
    o-xylene 36.73
    formic acid 209.28
    diethyl ether 609.17
    m-xylene 50.87
    p-xylene 47.16
    chlorobenzene 85.45
    dimethyl carbonate 105.01
    n-octane 16.75
    formamide 326.74
    cyclopentanone 443.45
    2-pentanone 367.35
    anisole 122.32
    cyclopentyl methyl ether 373.45
    gamma-butyrolactone 372.3
    1-methoxy-2-propanol 402.56
    pyridine 236.39
    3-pentanone 226.81
    furfural 228.15
    n-dodecane 9.88
    diethylene glycol 259.72
    diisopropyl ether 120.19
    tert-amyl alcohol 252.32
    acetylacetone 221.08
    n-hexadecane 10.51
    acetophenone 84.99
    methyl propionate 245.07
    isopentyl acetate 159.76
    trichloroethylene 285.14
    n-nonanol 75.33
    cyclohexanol 158.92
    benzyl alcohol 105.34
    2-ethylhexanol 131.11
    isooctanol 87.91
    dipropyl ether 235.64
    1,2-dichlorobenzene 65.65
    ethyl lactate 60.65
    propylene carbonate 150.84
    n-methylformamide 380.02
    2-pentanol 295.29
    n-pentane 79.81
    1-propoxy-2-propanol 224.71
    1-methoxy-2-propyl acetate 151.52
    2-(2-methoxypropoxy) propanol 135.43
    mesitylene 31.67
    ε-caprolactone 186.53
    p-cymene 31.31
    epichlorohydrin 500.09
    1,1,1-trichloroethane 143.81
    2-aminoethanol 252.89
    morpholine-4-carbaldehyde 252.27
    sulfolane 246.37
    2,2,4-trimethylpentane 25.54
    2-methyltetrahydrofuran 560.84
    n-hexyl acetate 130.1
    isooctane 23.86
    2-(2-butoxyethoxy)ethanol 230.3
    sec-butyl acetate 102.1
    tert-butyl acetate 153.15
    decalin 18.18
    glycerin 129.68
    diglyme 331.84
    acrylic acid 123.06
    isopropyl myristate 61.52
    n-butyric acid 306.07
    acetyl acetate 104.43
    di(2-ethylhexyl) phthalate 51.97
    ethyl propionate 128.53
    nitromethane 366.08
    1,2-diethoxyethane 367.08
    benzonitrile 87.89
    trioctyl phosphate 41.79
    1-bromopropane 211.57
    gamma-valerolactone 370.47
    n-decanol 59.88
    triethyl phosphate 51.94
    4-methyl-2-pentanol 149.73
    propionitrile 246.04
    vinylene carbonate 129.0
    1,1,2-trichlorotrifluoroethane 143.96
    DMS 97.02
    cumene 36.02
    2-octanol 66.93
    2-hexanone 210.5
    octyl acetate 72.49
    limonene 49.92
    1,2-dimethoxyethane 528.5
    ethyl orthosilicate 58.47
    tributyl phosphate 55.33
    diacetone alcohol 167.2
    N,N-dimethylaniline 76.33
    acrylonitrile 206.63
    aniline 115.52
    1,3-propanediol 352.61
    bromobenzene 72.92
    dibromomethane 241.42
    1,1,2,2-tetrachloroethane 172.52
    2-methyl-cyclohexyl acetate 86.25
    tetrabutyl urea 64.0
    diisobutyl methanol 70.32
    2-phenylethanol 105.61
    styrene 51.08
    dioctyl adipate 69.46
    dimethyl sulfate 88.43
    ethyl butyrate 120.06
    methyl lactate 81.55
    butyl lactate 75.71
    diethyl carbonate 70.01
    propanediol butyl ether 112.11
    triethyl orthoformate 82.42
    p-tert-butyltoluene 30.88
    methyl 4-tert-butylbenzoate 79.32
    morpholine 497.59
    tert-butylamine 227.11
    n-dodecanol 47.98
    dimethoxymethane 595.05
    ethylene carbonate 119.38
    cyrene 111.92
    2-ethoxyethyl acetate 168.09
    2-ethylhexyl acetate 114.6
    1,2,4-trichlorobenzene 66.73
    4-methylpyridine 189.91
    dibutyl ether 144.61
    2,6-dimethyl-4-heptanol 70.32
    DEF 267.12
    dimethyl isosorbide 195.71
    tetrachloroethylene 149.83
    eugenol 94.63
    triacetin 90.85
    span 80 102.19
    1,4-butanediol 183.1
    1,1-dichloroethane 209.8
    2-methyl-1-pentanol 305.64
    methyl formate 249.13
    2-methyl-1-butanol 350.19
    n-decane 16.45
    butyronitrile 305.2
    3,7-dimethyl-1-octanol 90.93
    1-chlorooctane 49.38
    1-chlorotetradecane 22.14
    n-nonane 17.1
    undecane 12.1
    tert-butylcyclohexane 22.53
    cyclooctane 14.61
    cyclopentanol 240.87
    tetrahydropyran 470.59
    tert-amyl methyl ether 206.43
    2,5,8-trioxanonane 224.79
    1-hexene 225.22
    2-isopropoxyethanol 288.47
    2,2,2-trifluoroethanol 81.88
    methyl butyrate 164.72

    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