5-Methyloctadecane

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  • Identifiers

    CAS number
    25117-35-5

    Molecular formula
    C19H40

    SMILES
    CCCCCCCCCCCCCC(C)CCCC

    Safety labels

  • Odor profile

    Fragrance
    Waxy 79.14%
    Fatty 33.68%
    Oily 33.48%
    Sweet 22.34%
    Gassy 21.01%
    Odorless 21.0%
    Fishy 18.99%
    Meaty 17.53%
    Burnt 15.24%
    Clean 14.78%

     

    Flavor
    Alkane 63.23%
    Waxy 46.95%
    Bland 24.82%
    Mild 23.98%
    Delicate 22.31%
    Slightly waxy 21.98%
    Incense 20.77%
    Citrus peel 20.67%
    Grapefruit peel 20.1%
    Low 19.74%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    10.2

    pKa est.
    8.31 (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

    • 145.09 ˚C est.

  • Synonyms

    • 5-Methyloctadecane
    • 25117-35-5
    • DTXSID401315802
    • RefChem:1073153
    • DTXCID101745688
    • Octadecane, 5-methyl-
    • 14-Methyl-1-octadecene
    • 5-Methyloctadecane #
    • SCHEMBL100654
    • SCHEMBL201252
    • SCHEMBL1645283
    • SCHEMBL5986445
    • SCHEMBL6764178
    • SCHEMBL28161483
    • SCHEMBL28219919
    • LMFA11000273
    • 25117-35-5

  • Applications

    5-Methyloctadecane (CAS 25117-35-5) is a long-chain, branched alkane with low volatility. In industrial and formulation contexts, it is commonly used as a base oil or processing fluid for lubricants and metalworking fluids; as a cosmetic/personal care ingredient, it serves as an emollient and hydrocarbon carrier oil; in perfumery it can function as a fragrance carrier or fixative to help modulate evaporation; as a processing oil and additive for plastics and elastomers; and in coatings and inks it can be used as a hydrocarbon additive to improve slip and gloss.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 235.17
    methanol 69.01
    isopropanol 449.83
    water 0.0
    ethyl acetate 2985.35
    n-propanol 442.27
    acetone 1606.3
    n-butanol 792.0
    acetonitrile 295.17
    DMF 776.24
    toluene 1967.76
    isobutanol 561.95
    1,4-dioxane 3142.64
    methyl acetate 1170.83
    THF 7681.07
    2-butanone 2130.2
    n-pentanol 559.28
    sec-butanol 767.38
    n-hexane 2939.43
    ethylene glycol 6.38
    NMP 1697.15
    cyclohexane 8457.91
    DMSO 975.91
    n-butyl acetate 6836.65
    n-octanol 850.13
    chloroform 3608.65
    n-propyl acetate 2866.44
    acetic acid 171.34
    dichloromethane 3556.23
    cyclohexanone 5760.76
    propylene glycol 31.57
    isopropyl acetate 3319.33
    DMAc 1292.04
    2-ethoxyethanol 489.94
    isopentanol 1260.31
    n-heptane 6667.35
    ethyl formate 614.76
    1,2-dichloroethane 3371.58
    n-hexanol 1379.55
    2-methoxyethanol 484.44
    isobutyl acetate 2475.77
    tetrachloromethane 1570.53
    n-pentyl acetate 3460.89
    transcutol 3723.94
    n-heptanol 884.73
    ethylbenzene 1245.9
    MIBK 2916.02
    2-propoxyethanol 1271.21
    tert-butanol 1361.1
    MTBE 4552.44
    2-butoxyethanol 1045.88
    propionic acid 302.87
    o-xylene 1462.61
    formic acid 7.22
    diethyl ether 4555.25
    m-xylene 1430.18
    p-xylene 1693.76
    chlorobenzene 1661.14
    dimethyl carbonate 328.12
    n-octane 1473.73
    formamide 19.4
    cyclopentanone 4208.32
    2-pentanone 3276.68
    anisole 1604.68
    cyclopentyl methyl ether 6108.98
    gamma-butyrolactone 2644.18
    1-methoxy-2-propanol 744.11
    pyridine 2222.74
    3-pentanone 2697.22
    furfural 1291.54
    n-dodecane 456.63
    diethylene glycol 210.87
    diisopropyl ether 3232.41
    tert-amyl alcohol 1502.56
    acetylacetone 2501.37
    n-hexadecane 575.26
    acetophenone 1405.19
    methyl propionate 1456.24
    isopentyl acetate 6578.54
    trichloroethylene 3890.39
    n-nonanol 942.9
    cyclohexanol 2104.87
    benzyl alcohol 482.83
    2-ethylhexanol 2588.84
    isooctanol 1146.36
    dipropyl ether 11006.96
    1,2-dichlorobenzene 1766.3
    ethyl lactate 476.63
    propylene carbonate 1747.96
    n-methylformamide 155.99
    2-pentanol 1125.58
    n-pentane 1884.01
    1-propoxy-2-propanol 2378.98
    1-methoxy-2-propyl acetate 3429.04
    2-(2-methoxypropoxy) propanol 1024.03
    mesitylene 1351.67
    ε-caprolactone 3818.34
    p-cymene 1897.96
    epichlorohydrin 3323.17
    1,1,1-trichloroethane 5003.5
    2-aminoethanol 36.96
    morpholine-4-carbaldehyde 1478.38
    sulfolane 3260.99
    2,2,4-trimethylpentane 981.02
    2-methyltetrahydrofuran 7098.78
    n-hexyl acetate 3117.11
    isooctane 889.93
    2-(2-butoxyethoxy)ethanol 1348.41
    sec-butyl acetate 3005.1
    tert-butyl acetate 4735.87
    decalin 1903.72
    glycerin 42.57
    diglyme 3579.48
    acrylic acid 129.31
    isopropyl myristate 1833.19
    n-butyric acid 1226.38
    acetyl acetate 1469.48
    di(2-ethylhexyl) phthalate 612.44
    ethyl propionate 2724.51
    nitromethane 428.61
    1,2-diethoxyethane 5915.49
    benzonitrile 867.99
    trioctyl phosphate 657.15
    1-bromopropane 4432.76
    gamma-valerolactone 3148.57
    n-decanol 683.73
    triethyl phosphate 1886.66
    4-methyl-2-pentanol 1005.3
    propionitrile 650.52
    vinylene carbonate 912.2
    1,1,2-trichlorotrifluoroethane 1101.71
    DMS 1142.83
    cumene 986.88
    2-octanol 932.82
    2-hexanone 2773.65
    octyl acetate 1620.84
    limonene 4377.7
    1,2-dimethoxyethane 2867.46
    ethyl orthosilicate 2246.48
    tributyl phosphate 908.58
    diacetone alcohol 2064.51
    N,N-dimethylaniline 1291.74
    acrylonitrile 379.46
    aniline 956.56
    1,3-propanediol 147.7
    bromobenzene 2486.57
    dibromomethane 3255.91
    1,1,2,2-tetrachloroethane 4320.05
    2-methyl-cyclohexyl acetate 3331.49
    tetrabutyl urea 1318.44
    diisobutyl methanol 2616.44
    2-phenylethanol 788.5
    styrene 1338.25
    dioctyl adipate 1768.6
    dimethyl sulfate 562.04
    ethyl butyrate 6583.24
    methyl lactate 264.82
    butyl lactate 1200.95
    diethyl carbonate 2954.61
    propanediol butyl ether 473.81
    triethyl orthoformate 4959.28
    p-tert-butyltoluene 1937.6
    methyl 4-tert-butylbenzoate 1589.86
    morpholine 3300.76
    tert-butylamine 1576.07
    n-dodecanol 570.34
    dimethoxymethane 1204.21
    ethylene carbonate 1192.72
    cyrene 641.69
    2-ethoxyethyl acetate 2445.39
    2-ethylhexyl acetate 6184.83
    1,2,4-trichlorobenzene 1823.16
    4-methylpyridine 2391.97
    dibutyl ether 6563.66
    2,6-dimethyl-4-heptanol 2616.44
    DEF 2909.36
    dimethyl isosorbide 2379.85
    tetrachloroethylene 2422.05
    eugenol 799.86
    triacetin 1907.79
    span 80 1019.95
    1,4-butanediol 54.82
    1,1-dichloroethane 3317.48
    2-methyl-1-pentanol 922.0
    methyl formate 137.49
    2-methyl-1-butanol 989.44
    n-decane 1130.89
    butyronitrile 1267.79
    3,7-dimethyl-1-octanol 1591.94
    1-chlorooctane 2377.2
    1-chlorotetradecane 816.3
    n-nonane 1342.47
    undecane 661.44
    tert-butylcyclohexane 1534.68
    cyclooctane 3003.32
    cyclopentanol 1440.2
    tetrahydropyran 8385.93
    tert-amyl methyl ether 3615.07
    2,5,8-trioxanonane 1892.71
    1-hexene 3231.28
    2-isopropoxyethanol 664.52
    2,2,2-trifluoroethanol 57.3
    methyl butyrate 3257.39

    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