2-Methyloctadecane

Overview IFRA Botanical Request a quote

  • Identifiers

    CAS number
    1560-88-9

    Molecular formula
    C19H40

    SMILES
    CCCCCCCCCCCCCCCCC(C)C

  • Odor profile

    Waxy 82.03%
    Fatty 35.4%
    Oily 32.84%
    Odorless 22.02%
    Fishy 19.86%
    Sweet 18.46%
    Meaty 17.2%
    Gassy 17.1%
    Savory 15.18%
    Burnt 14.97%

    Scent© AI

  • Properties

    XLogP3-AA
    10.2

    Molecular weight
    268.5 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    327°C

    Flash point est.
    148.46 ˚C

  • Synonyms

    • 2-METHYLOCTADECANE
    • Octadecane, 2-methyl-
    • 1560-88-9
    • AI3-35195
    • DTXSID50166024
    • Octadecane, 2methyl
    • DTXCID8088515
    • LMFA11000350
    • DB-043303
    • NS00010694
    • 680-583-1

  • Applications

    2-Methyloctadecane (CAS 1560-88-9) is a long‑chain branched isoalkane used primarily in research and analytics: as a high‑purity hydrocarbon reference/marker in GC or GC–MS for characterizing branched alkanes and petroleum fractions; as an inert, nonpolar, high‑boiling medium/diluent for synthesis and property measurements; as a model iso‑alkane component in diesel surrogate fuels for combustion, ignition, and emissions studies; as a reference compound in chemical‑ecology and environmental fate/biodegradation work involving cuticular hydrocarbons; as a paraffin‑blend/phase‑change material component to tune melting points for thermal energy storage; and as a model base‑fluid constituent in lubricant lab formulations to study pour‑point, viscosity, and low‑temperature flow and for method validation/quality control.

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 98.44
    methanol 31.43
    isopropanol 197.5
    water 0.0
    ethyl acetate 1583.6
    n-propanol 200.0
    acetone 714.55
    n-butanol 375.53
    acetonitrile 130.37
    DMF 399.43
    toluene 1213.36
    isobutanol 274.07
    1,4-dioxane 1696.6
    methyl acetate 596.85
    THF 4522.66
    2-butanone 1069.93
    n-pentanol 280.58
    sec-butanol 369.7
    n-hexane 1754.72
    ethylene glycol 3.42
    NMP 1122.32
    cyclohexane 5426.97
    DMSO 503.57
    n-butyl acetate 3936.41
    n-octanol 500.09
    chloroform 2279.54
    n-propyl acetate 1626.53
    acetic acid 92.15
    dichloromethane 2092.05
    cyclohexanone 3314.33
    propylene glycol 17.36
    isopropyl acetate 1919.16
    DMAc 800.79
    2-ethoxyethanol 262.54
    isopentanol 623.27
    n-heptane 4435.78
    ethyl formate 315.2
    1,2-dichloroethane 1850.45
    n-hexanol 717.97
    2-methoxyethanol 248.86
    isobutyl acetate 1497.34
    tetrachloromethane 976.76
    n-pentyl acetate 2060.85
    transcutol 2233.85
    n-heptanol 501.22
    ethylbenzene 829.49
    MIBK 1747.04
    2-propoxyethanol 705.84
    tert-butanol 661.3
    MTBE 2406.61
    2-butoxyethanol 609.17
    propionic acid 164.2
    o-xylene 973.07
    formic acid 4.56
    diethyl ether 2266.46
    m-xylene 940.66
    p-xylene 1149.9
    chlorobenzene 1033.44
    dimethyl carbonate 197.14
    n-octane 959.92
    formamide 11.11
    cyclopentanone 2481.53
    2-pentanone 1737.67
    anisole 1038.79
    cyclopentyl methyl ether 3835.59
    gamma-butyrolactone 1642.4
    1-methoxy-2-propanol 401.37
    pyridine 1236.55
    3-pentanone 1517.55
    furfural 817.9
    n-dodecane 302.35
    diethylene glycol 121.7
    diisopropyl ether 1903.19
    tert-amyl alcohol 795.04
    acetylacetone 1479.65
    n-hexadecane 384.37
    acetophenone 946.98
    methyl propionate 814.38
    isopentyl acetate 3869.73
    trichloroethylene 2366.8
    n-nonanol 572.33
    cyclohexanol 1201.17
    benzyl alcohol 292.77
    2-ethylhexanol 1530.31
    isooctanol 666.57
    dipropyl ether 6633.03
    1,2-dichlorobenzene 1152.24
    ethyl lactate 303.14
    propylene carbonate 1125.49
    n-methylformamide 77.96
    2-pentanol 577.99
    n-pentane 1071.58
    1-propoxy-2-propanol 1403.98
    1-methoxy-2-propyl acetate 2183.7
    2-(2-methoxypropoxy) propanol 698.55
    mesitylene 918.49
    ε-caprolactone 2262.79
    p-cymene 1298.5
    epichlorohydrin 1968.96
    1,1,1-trichloroethane 3077.26
    2-aminoethanol 19.59
    morpholine-4-carbaldehyde 905.05
    sulfolane 2193.75
    2,2,4-trimethylpentane 638.88
    2-methyltetrahydrofuran 4076.64
    n-hexyl acetate 1900.15
    isooctane 572.59
    2-(2-butoxyethoxy)ethanol 845.12
    sec-butyl acetate 1822.48
    tert-butyl acetate 2898.93
    decalin 1339.74
    glycerin 25.08
    diglyme 2292.72
    acrylic acid 75.39
    isopropyl myristate 1239.82
    n-butyric acid 646.96
    acetyl acetate 870.53
    di(2-ethylhexyl) phthalate 418.6
    ethyl propionate 1634.99
    nitromethane 218.92
    1,2-diethoxyethane 3427.91
    benzonitrile 505.45
    trioctyl phosphate 433.53
    1-bromopropane 2443.24
    gamma-valerolactone 1870.76
    n-decanol 414.11
    triethyl phosphate 1326.64
    4-methyl-2-pentanol 554.43
    propionitrile 315.61
    vinylene carbonate 566.98
    1,1,2-trichlorotrifluoroethane 701.47
    DMS 731.56
    cumene 684.62
    2-octanol 533.54
    2-hexanone 1590.89
    octyl acetate 1071.69
    limonene 2948.05
    1,2-dimethoxyethane 1563.58
    ethyl orthosilicate 1592.99
    tributyl phosphate 613.8
    diacetone alcohol 1257.98
    N,N-dimethylaniline 888.49
    acrylonitrile 184.76
    aniline 559.78
    1,3-propanediol 76.29
    bromobenzene 1575.56
    dibromomethane 1881.52
    1,1,2,2-tetrachloroethane 2706.33
    2-methyl-cyclohexyl acetate 2296.48
    tetrabutyl urea 888.79
    diisobutyl methanol 1665.46
    2-phenylethanol 491.09
    styrene 856.69
    dioctyl adipate 1226.66
    dimethyl sulfate 360.58
    ethyl butyrate 4040.18
    methyl lactate 163.72
    butyl lactate 757.53
    diethyl carbonate 1888.17
    propanediol butyl ether 281.91
    triethyl orthoformate 3328.11
    p-tert-butyltoluene 1352.49
    methyl 4-tert-butylbenzoate 1125.23
    morpholine 1746.75
    tert-butylamine 804.35
    n-dodecanol 352.46
    dimethoxymethane 649.1
    ethylene carbonate 728.44
    cyrene 471.35
    2-ethoxyethyl acetate 1486.1
    2-ethylhexyl acetate 3724.89
    1,2,4-trichlorobenzene 1219.46
    4-methylpyridine 1340.33
    dibutyl ether 3960.35
    2,6-dimethyl-4-heptanol 1665.46
    DEF 1634.24
    dimethyl isosorbide 1744.41
    tetrachloroethylene 1541.04
    eugenol 536.76
    triacetin 1296.37
    span 80 687.45
    1,4-butanediol 29.43
    1,1-dichloroethane 1857.96
    2-methyl-1-pentanol 497.91
    methyl formate 72.51
    2-methyl-1-butanol 499.99
    n-decane 739.03
    butyronitrile 600.61
    3,7-dimethyl-1-octanol 959.92
    1-chlorooctane 1515.9
    1-chlorotetradecane 546.73
    n-nonane 866.53
    undecane 437.52
    tert-butylcyclohexane 1066.18
    cyclooctane 2046.26
    cyclopentanol 825.38
    tetrahydropyran 4584.86
    tert-amyl methyl ether 2144.57
    2,5,8-trioxanonane 1287.55
    1-hexene 1771.8
    2-isopropoxyethanol 370.61
    2,2,2-trifluoroethanol 35.15
    methyl butyrate 1910.28

    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

Botanical

Name CAS Botanical Proportion
Ketaki (India) Pandanus fascicularis Lam., var. Ketaki, fam. Pandanaceae 0.01%