6-Methyl-1,2,3,4-tetrahydroquinoline

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  • Identifiers

    CAS number
    91-61-2

    Molecular formula
    C10H13N

    SMILES
    CC1=CC2=C(C=C1)NCCC2

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Animal 68.2%
    Sweet 60.01%
    Phenolic 39.68%
    Floral 35.53%
    Honey 35.34%
    Leathery 34.68%
    Musty 31.49%
    Powdery 29.35%
    Earthy 29.22%
    Tobacco 28.03%

    Scent© AI

  • Properties

    XLogP3-AA
    2.7

    pKa est.
    5.81 (weak acid)

    Molecular weight
    147.22 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Slow

    Boiling point est.
    258°C

    Flash point est.
    108.15 ˚C

  • Synonyms

    • 6-Methyl-1,2,3,4-tetrahydroquinoline
    • 91-61-2
    • Civettal
    • 1,2,3,4-Tetrahydro-6-methylquinoline
    • Quinoline, 1,2,3,4-tetrahydro-6-methyl-
    • p-Methyltetrahydroquinoline
    • 130870-84-7
    • DTXSID6047444
    • UNII-0I67838Y8K
    • EINECS 202-083-0
    • MFCD00023887
    • NSC 65606
    • NSC-65606
    • AI3-36188
    • DTXCID4027444
    • XOKMRXSMOHCNIX-UHFFFAOYSA-
    • 0I67838Y8K
    • 6-methyl-1,2,3,4-tetrahydro-quinoline
    • Quinoline, tetrahydro-6-methyl- (9CI)
    • MTHQ-6 cpd
    • tetrahydro-6-methylquinoline
    • para-methyl tetrahydroquinoline
    • SCHEMBL531817
    • CHEMBL3188227
    • NSC65606
    • Tox21_302506
    • 1,3,4-Tetrahydro-6-methylquinoline
    • 6-Methyl-1,3,4-tetrahydroquinoline
    • STK400136
    • AKOS000121360
    • FS-5625
    • CAS-91-61-2
    • Quinoline,2,3,4-tetrahydro-6-methyl-
    • NCGC00256625-01
    • SY048624
    • DB-057265
    • CS-0070384
    • M1302
    • NS00013214
    • EN300-21231
    • D91482
    • Q27236809
    • F2190-0535
    • Z104494706
    • 202-083-0

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 101.31
    methanol 82.17
    isopropanol 76.46
    water 0.21
    ethyl acetate 152.95
    n-propanol 104.86
    acetone 201.68
    n-butanol 104.62
    acetonitrile 143.96
    DMF 273.7
    toluene 143.94
    isobutanol 79.19
    1,4-dioxane 400.06
    methyl acetate 151.01
    THF 394.01
    2-butanone 179.95
    n-pentanol 83.99
    sec-butanol 70.08
    n-hexane 17.94
    ethylene glycol 21.48
    NMP 215.03
    cyclohexane 36.95
    DMSO 280.43
    n-butyl acetate 262.2
    n-octanol 90.25
    chloroform 522.26
    n-propyl acetate 116.94
    acetic acid 100.56
    dichloromethane 561.69
    cyclohexanone 288.08
    propylene glycol 26.46
    isopropyl acetate 86.67
    DMAc 210.59
    2-ethoxyethanol 103.02
    isopentanol 85.32
    n-heptane 49.16
    ethyl formate 138.71
    1,2-dichloroethane 284.42
    n-hexanol 197.92
    2-methoxyethanol 141.65
    isobutyl acetate 90.33
    tetrachloromethane 95.47
    n-pentyl acetate 110.85
    transcutol 363.37
    n-heptanol 89.31
    ethylbenzene 70.29
    MIBK 94.35
    2-propoxyethanol 227.32
    tert-butanol 88.98
    MTBE 105.13
    2-butoxyethanol 117.6
    propionic acid 92.32
    o-xylene 84.74
    formic acid 25.13
    diethyl ether 145.62
    m-xylene 98.99
    p-xylene 83.51
    chlorobenzene 191.3
    dimethyl carbonate 71.4
    n-octane 20.89
    formamide 39.93
    cyclopentanone 331.2
    2-pentanone 152.67
    anisole 112.75
    cyclopentyl methyl ether 178.48
    gamma-butyrolactone 331.9
    1-methoxy-2-propanol 110.62
    pyridine 299.67
    3-pentanone 136.76
    furfural 273.56
    n-dodecane 19.8
    diethylene glycol 123.11
    diisopropyl ether 49.41
    tert-amyl alcohol 72.42
    acetylacetone 160.38
    n-hexadecane 22.56
    acetophenone 107.16
    methyl propionate 132.89
    isopentyl acetate 181.11
    trichloroethylene 473.35
    n-nonanol 81.21
    cyclohexanol 90.05
    benzyl alcohol 80.93
    2-ethylhexanol 135.31
    isooctanol 68.88
    dipropyl ether 179.43
    1,2-dichlorobenzene 153.51
    ethyl lactate 52.8
    propylene carbonate 188.75
    n-methylformamide 116.91
    2-pentanol 60.04
    n-pentane 18.35
    1-propoxy-2-propanol 171.93
    1-methoxy-2-propyl acetate 165.97
    2-(2-methoxypropoxy) propanol 114.63
    mesitylene 66.73
    ε-caprolactone 205.37
    p-cymene 78.44
    epichlorohydrin 341.48
    1,1,1-trichloroethane 226.43
    2-aminoethanol 40.24
    morpholine-4-carbaldehyde 248.88
    sulfolane 323.04
    2,2,4-trimethylpentane 14.32
    2-methyltetrahydrofuran 256.74
    n-hexyl acetate 141.91
    isooctane 13.42
    2-(2-butoxyethoxy)ethanol 147.07
    sec-butyl acetate 73.33
    tert-butyl acetate 93.61
    decalin 23.84
    glycerin 42.54
    diglyme 283.99
    acrylic acid 80.49
    isopropyl myristate 70.66
    n-butyric acid 140.47
    acetyl acetate 105.31
    di(2-ethylhexyl) phthalate 65.43
    ethyl propionate 95.08
    nitromethane 189.0
    1,2-diethoxyethane 221.23
    benzonitrile 144.4
    trioctyl phosphate 53.31
    1-bromopropane 181.35
    gamma-valerolactone 329.97
    n-decanol 67.26
    triethyl phosphate 68.27
    4-methyl-2-pentanol 46.65
    propionitrile 143.28
    vinylene carbonate 187.77
    1,1,2-trichlorotrifluoroethane 154.17
    DMS 104.18
    cumene 54.69
    2-octanol 60.58
    2-hexanone 126.76
    octyl acetate 87.76
    limonene 109.11
    1,2-dimethoxyethane 223.79
    ethyl orthosilicate 67.5
    tributyl phosphate 61.55
    diacetone alcohol 90.69
    N,N-dimethylaniline 87.18
    acrylonitrile 157.83
    aniline 117.46
    1,3-propanediol 68.58
    bromobenzene 227.11
    dibromomethane 368.77
    1,1,2,2-tetrachloroethane 306.23
    2-methyl-cyclohexyl acetate 111.97
    tetrabutyl urea 84.67
    diisobutyl methanol 73.57
    2-phenylethanol 122.12
    styrene 84.07
    dioctyl adipate 83.47
    dimethyl sulfate 104.03
    ethyl butyrate 149.54
    methyl lactate 54.24
    butyl lactate 71.04
    diethyl carbonate 96.56
    propanediol butyl ether 86.68
    triethyl orthoformate 102.66
    p-tert-butyltoluene 73.32
    methyl 4-tert-butylbenzoate 110.73
    morpholine 303.52
    tert-butylamine 61.62
    n-dodecanol 58.12
    dimethoxymethane 200.94
    ethylene carbonate 164.15
    cyrene 102.57
    2-ethoxyethyl acetate 147.32
    2-ethylhexyl acetate 163.48
    1,2,4-trichlorobenzene 157.59
    4-methylpyridine 233.53
    dibutyl ether 130.44
    2,6-dimethyl-4-heptanol 73.57
    DEF 162.95
    dimethyl isosorbide 200.63
    tetrachloroethylene 218.33
    eugenol 101.63
    triacetin 117.33
    span 80 102.98
    1,4-butanediol 35.99
    1,1-dichloroethane 239.76
    2-methyl-1-pentanol 70.57
    methyl formate 112.53
    2-methyl-1-butanol 79.81
    n-decane 30.55
    butyronitrile 159.91
    3,7-dimethyl-1-octanol 81.26
    1-chlorooctane 88.99
    1-chlorotetradecane 41.91
    n-nonane 29.44
    undecane 23.93
    tert-butylcyclohexane 23.6
    cyclooctane 20.1
    cyclopentanol 100.41
    tetrahydropyran 287.7
    tert-amyl methyl ether 79.67
    2,5,8-trioxanonane 203.69
    1-hexene 66.14
    2-isopropoxyethanol 84.61
    2,2,2-trifluoroethanol 38.22
    methyl butyrate 119.39

    Scent© AI

1 4

IFRA standard 51

Recommendation
Specification
Maximum acceptable concentrations in the finished product (%)
Category 1
Products applied to the lips
 See notebox Category 7A
Rinse-off products applied to the hair with some hand contact
 See notebox
Category 2
Products applied to the axillae
 See notebox Category 7B
Leave-on products applied to the hair with some hand contact
 See notebox
Category 3
Products applied to the face/body using fingertips
 See notebox Category 8
Products with significant anogenital exposure
 See notebox
Category 4
Products related to fine fragrance
 See notebox Category 9
Products with body and hand exposure, primarily rinse off
 See notebox
Category 5A
Body lotion products applied to the body using the hands (palms), primarily leave on
 See notebox Category 10A
Household care products with mostly hand contact
 See notebox
Category 5B
Face moisturizer products applied to the face using the hands (palms), primarily leave on
 See notebox Category 10B
Household care products with mostly hand contact, including aerosol/spray products (with potential leave-on skin contact)
 See notebox
Category 5C
Hand cream products applied to the hands using the hands (palms), primarily leave on
 See notebox Category 11A
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate without UV exposure
 See notebox
Category 5D
Baby Creams, baby Oils and baby talc
 See notebox Category 11B
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate with potential UV exposure
 See notebox
Category 6
Products with oral and lip exposure
 See notebox Category 12
Products not intended for direct skin contact, minimal or insignificant transfer to skin
 See notebox

Specification
The material has been identified for having the potential of forming nitrosamines in nitrosating systems. Downstream users therefore have to be notified of the presence of the material and its potential, to be able to consider adequate protective measures.