7-Methyl-octadecane

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  • Identifiers

    CAS number
    26741-16-2

    Molecular formula
    C19H40

    SMILES
    CCCCCCCCCCCC(C)CCCCCC

    Safety labels

  • Odor profile

    Fragrance
    Waxy 78.36%
    Oily 33.61%
    Fatty 32.66%
    Sweet 23.64%
    Gassy 22.26%
    Odorless 20.6%
    Fishy 18.76%
    Meaty 17.07%
    Burnt 15.22%
    Clean 15.12%

     

    Flavor
    Alkane 62.73%
    Waxy 46.39%
    Bland 24.78%
    Mild 23.88%
    Delicate 22.37%
    Slightly waxy 21.92%
    Incense 20.73%
    Citrus peel 20.63%
    Grapefruit peel 20.1%
    Diterpene 19.76%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    10.2

    pKa est.
    8.28 (weak base)

    Molecular weight
    268.5 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    323°C

    Flash point

    • 145.12 ˚C est.

  • Synonyms

    • 7-Methyl-octadecane
    • 7-methyloctadecane
    • SCHEMBL101578
    • SCHEMBL202008
    • SCHEMBL917528
    • SCHEMBL1417505
    • SCHEMBL5985931
    • SCHEMBL7448364
    • SCHEMBL17336107
    • 26741-16-2
    • 26741-16-2

  • Applications

    7-Methyl-octadecane (CAS 26741-16-2) is a long-chain, branched saturated hydrocarbon typically used as a high-boiling diluent or carrier in formulations where low volatility is desired. In perfumery and fragrances, it may be used as a fixative to extend scent longevity; in cosmetics and personal care it may function as an emollient or carrier for other ingredients; in coatings and inks it can serve as a hydrocarbon solvent/diluent compatible with other components; in plastics and polymer processing it may act as a processing oil or lubricant to improve flow and handling; in industrial manufacturing and cleaning it may be used as a hydrocarbon solvent for heavy-duty cleaning tasks. Its use is subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 296.73
    methanol 88.96
    isopropanol 553.24
    water 0.0
    ethyl acetate 3512.73
    n-propanol 544.81
    acetone 1905.6
    n-butanol 962.42
    acetonitrile 356.14
    DMF 872.5
    toluene 2310.36
    isobutanol 675.81
    1,4-dioxane 3624.9
    methyl acetate 1359.75
    THF 8638.16
    2-butanone 2460.51
    n-pentanol 677.65
    sec-butanol 917.69
    n-hexane 3552.1
    ethylene glycol 7.58
    NMP 1887.05
    cyclohexane 10132.85
    DMSO 1106.11
    n-butyl acetate 8055.87
    n-octanol 947.52
    chloroform 4036.13
    n-propyl acetate 3346.65
    acetic acid 206.8
    dichloromethane 3972.57
    cyclohexanone 6536.6
    propylene glycol 37.15
    isopropyl acetate 3898.41
    DMAc 1441.03
    2-ethoxyethanol 586.88
    isopentanol 1517.59
    n-heptane 7725.11
    ethyl formate 703.49
    1,2-dichloroethane 3846.17
    n-hexanol 1639.68
    2-methoxyethanol 588.58
    isobutyl acetate 2829.09
    tetrachloromethane 1771.46
    n-pentyl acetate 3939.58
    transcutol 4375.73
    n-heptanol 995.67
    ethylbenzene 1412.23
    MIBK 3327.5
    2-propoxyethanol 1510.81
    tert-butanol 1630.93
    MTBE 5553.93
    2-butoxyethanol 1201.4
    propionic acid 356.4
    o-xylene 1662.23
    formic acid 8.98
    diethyl ether 5591.3
    m-xylene 1633.01
    p-xylene 1918.76
    chlorobenzene 1909.2
    dimethyl carbonate 369.88
    n-octane 1670.23
    formamide 23.63
    cyclopentanone 4690.7
    2-pentanone 3842.07
    anisole 1817.05
    cyclopentyl methyl ether 7029.98
    gamma-butyrolactone 2940.03
    1-methoxy-2-propanol 875.25
    pyridine 2543.1
    3-pentanone 3128.01
    furfural 1465.04
    n-dodecane 508.23
    diethylene glycol 248.71
    diisopropyl ether 3903.09
    tert-amyl alcohol 1800.71
    acetylacetone 2824.28
    n-hexadecane 640.19
    acetophenone 1551.13
    methyl propionate 1676.62
    isopentyl acetate 7834.6
    trichloroethylene 4360.06
    n-nonanol 1066.08
    cyclohexanol 2439.46
    benzyl alcohol 545.52
    2-ethylhexanol 3046.09
    isooctanol 1301.22
    dipropyl ether 12873.97
    1,2-dichlorobenzene 1987.35
    ethyl lactate 533.38
    propylene carbonate 1939.27
    n-methylformamide 183.04
    2-pentanol 1340.99
    n-pentane 2355.41
    1-propoxy-2-propanol 2754.75
    1-methoxy-2-propyl acetate 3976.68
    2-(2-methoxypropoxy) propanol 1162.15
    mesitylene 1538.84
    ε-caprolactone 4359.91
    p-cymene 2157.73
    epichlorohydrin 3717.05
    1,1,1-trichloroethane 5678.42
    2-aminoethanol 44.85
    morpholine-4-carbaldehyde 1678.4
    sulfolane 3570.53
    2,2,4-trimethylpentane 1173.57
    2-methyltetrahydrofuran 8144.23
    n-hexyl acetate 3525.67
    isooctane 1050.84
    2-(2-butoxyethoxy)ethanol 1524.96
    sec-butyl acetate 3502.72
    tert-butyl acetate 5530.11
    decalin 2202.92
    glycerin 50.02
    diglyme 4063.82
    acrylic acid 150.24
    isopropyl myristate 2057.12
    n-butyric acid 1456.45
    acetyl acetate 1720.29
    di(2-ethylhexyl) phthalate 675.89
    ethyl propionate 3146.42
    nitromethane 504.26
    1,2-diethoxyethane 6940.18
    benzonitrile 987.32
    trioctyl phosphate 727.2
    1-bromopropane 5113.8
    gamma-valerolactone 3597.16
    n-decanol 771.34
    triethyl phosphate 2149.82
    4-methyl-2-pentanol 1190.83
    propionitrile 766.78
    vinylene carbonate 1022.27
    1,1,2-trichlorotrifluoroethane 1236.71
    DMS 1272.69
    cumene 1117.91
    2-octanol 1034.15
    2-hexanone 3226.93
    octyl acetate 1806.23
    limonene 4999.17
    1,2-dimethoxyethane 3324.59
    ethyl orthosilicate 2579.51
    tributyl phosphate 1012.86
    diacetone alcohol 2364.79
    N,N-dimethylaniline 1463.78
    acrylonitrile 436.85
    aniline 1128.57
    1,3-propanediol 178.51
    bromobenzene 2812.54
    dibromomethane 3664.41
    1,1,2,2-tetrachloroethane 4855.17
    2-methyl-cyclohexyl acetate 3816.6
    tetrabutyl urea 1464.06
    diisobutyl methanol 3013.09
    2-phenylethanol 914.09
    styrene 1535.56
    dioctyl adipate 1960.93
    dimethyl sulfate 619.07
    ethyl butyrate 7609.32
    methyl lactate 297.92
    butyl lactate 1329.74
    diethyl carbonate 3404.88
    propanediol butyl ether 527.42
    triethyl orthoformate 5754.37
    p-tert-butyltoluene 2206.58
    methyl 4-tert-butylbenzoate 1752.2
    morpholine 3857.34
    tert-butylamine 1907.61
    n-dodecanol 638.96
    dimethoxymethane 1389.6
    ethylene carbonate 1340.92
    cyrene 692.81
    2-ethoxyethyl acetate 2798.08
    2-ethylhexyl acetate 7292.43
    1,2,4-trichlorobenzene 2045.64
    4-methylpyridine 2768.96
    dibutyl ether 7596.12
    2,6-dimethyl-4-heptanol 3013.09
    DEF 3349.51
    dimethyl isosorbide 2641.98
    tetrachloroethylene 2741.22
    eugenol 879.67
    triacetin 2089.15
    span 80 1148.25
    1,4-butanediol 63.49
    1,1-dichloroethane 3745.92
    2-methyl-1-pentanol 1094.22
    methyl formate 157.22
    2-methyl-1-butanol 1182.1
    n-decane 1257.08
    butyronitrile 1501.51
    3,7-dimethyl-1-octanol 1807.78
    1-chlorooctane 2635.71
    1-chlorotetradecane 910.56
    n-nonane 1497.69
    undecane 735.23
    tert-butylcyclohexane 1778.93
    cyclooctane 3496.92
    cyclopentanol 1636.46
    tetrahydropyran 9842.77
    tert-amyl methyl ether 4305.84
    2,5,8-trioxanonane 2120.0
    1-hexene 3952.4
    2-isopropoxyethanol 775.88
    2,2,2-trifluoroethanol 67.18
    methyl butyrate 3750.12

    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