Tetracosane

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  • Identifiers

    CAS number
    646-31-1

    Molecular formula
    C24H50

    SMILES
    CCCCCCCCCCCCCCCCCCCCCCCC

    Retention indicies (RI)

    • DB5: 2400.0
    • Carbowax: 2400.0

  • Odor profile

    Waxy 85.31%
    Fatty 36.7%
    Oily 31.02%
    Odorless 24.24%
    Fishy 17.12%
    Sweet 15.18%
    Meaty 14.85%
    Savory 13.04%
    Gassy 13.01%
    Burnt 12.09%

    Scent© AI

  • Properties

    XLogP3-AA
    12.6

    Molecular weight
    338.7 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Melting point expt.

    • 126 °F (NTP, 1992)
    • 50.3 °C
    • 54 °C

    Boiling point

    • 736.3 °F at 760 mmHg (NTP, 1992)
    • 391 °C
    • 390.00 to 392.00 °C. @ 760.00 mm Hg

    Flash point est.
    191.68 ˚C

    Flash point expt.

    • > 113.00 °C (> 235.40 °F) - closed cup

    Solubility expt.

    • Insoluble in water
    • Slightly soluble in ethanol; very soluble in ethyl ether
    • Soluble in alcohol

  • Synonyms

    • TETRACOSANE
    • n-Tetracosane
    • 646-31-1
    • Lignocerane
    • UNII-YQ5H1M1D7I
    • YQ5H1M1D7I
    • NSC 2984
    • NSC-2984
    • EINECS 211-474-5
    • MFCD00009352
    • AI3-52698
    • DTXSID8060955
    • CHEBI:32936
    • HSDB 8354
    • Tricosane, methyl-
    • Tetracosane, analytical standard
    • CH3-(CH2)22-CH3
    • CH3-[CH2]22-CH3
    • Tetracosane; NSC 2984; n-Tetracosane
    • Tetracosane, 99%
    • CHEMBL4172502
    • DTXCID7044346
    • NSC2984
    • HY-N7933
    • LMFA11000585
    • STL301146
    • AKOS015843189
    • FT70256
    • AS-10445
    • DB-054706
    • CS-0138834
    • NS00010796
    • S0296
    • T0075
    • D92298
    • Q150988
    • 0A751D89-FC23-4E63-9FA0-2DD14DA5803E
    • 211-474-5

  • Applications

    Tetracosane (n‑tetracosane, C24H50, CAS 646‑31‑1) is a chemically inert straight‑chain alkane with a melting range near 50 °C, used as a constituent of paraffin/wax for candles, polishes, moisture‑barrier and anticorrosion coatings; a friction modifier/lubricity component and model compound in tribology; a phase‑change material (PCM) for mid‑temperature thermal energy storage in building materials, thermoregulating textiles, thermal packaging, and electronics thermal management (often via microencapsulation or composites with silica, porous graphite, or polymers); an n‑alkane standard in gas chromatography to build Kovats/linear retention index ladders and to normalize retention times for hydrocarbon, essential oil, and petroleum analyses; a reference for DSC/melting‑point calibration and for studies of crystallization, solid–solid transitions, and self‑assembled monolayers on carbon/mica; and as a representative “wax” in research on wax precipitation/paraffin deposition in pipelines and in creating hydrophobic/superhydrophobic alkane‑based surfaces.

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 8.5
    methanol 4.21
    isopropanol 17.4
    water 0.0
    ethyl acetate 292.83
    n-propanol 22.18
    acetone 110.89
    n-butanol 39.19
    acetonitrile 20.52
    DMF 104.87
    toluene 182.15
    isobutanol 34.36
    1,4-dioxane 318.93
    methyl acetate 125.2
    THF 978.1
    2-butanone 193.11
    n-pentanol 34.72
    sec-butanol 42.95
    n-hexane 164.59
    ethylene glycol 0.64
    NMP 494.29
    cyclohexane 902.1
    DMSO 152.2
    n-butyl acetate 680.19
    n-octanol 94.49
    chloroform 653.22
    n-propyl acetate 381.69
    acetic acid 24.1
    dichloromethane 614.18
    cyclohexanone 796.61
    propylene glycol 2.61
    isopropyl acetate 406.38
    DMAc 288.47
    2-ethoxyethanol 51.93
    isopentanol 72.61
    n-heptane 575.51
    ethyl formate 71.77
    1,2-dichloroethane 481.6
    n-hexanol 70.81
    2-methoxyethanol 44.47
    isobutyl acetate 350.64
    tetrachloromethane 302.37
    n-pentyl acetate 657.58
    transcutol 544.7
    n-heptanol 82.56
    ethylbenzene 154.86
    MIBK 352.97
    2-propoxyethanol 107.37
    tert-butanol 73.43
    MTBE 311.29
    2-butoxyethanol 137.64
    propionic acid 40.73
    o-xylene 207.33
    formic acid 2.0
    diethyl ether 249.74
    m-xylene 167.22
    p-xylene 238.56
    chlorobenzene 251.26
    dimethyl carbonate 62.11
    n-octane 153.09
    formamide 4.57
    cyclopentanone 731.75
    2-pentanone 285.41
    anisole 246.96
    cyclopentyl methyl ether 849.21
    gamma-butyrolactone 550.48
    1-methoxy-2-propanol 72.33
    pyridine 261.8
    3-pentanone 313.43
    furfural 280.61
    n-dodecane 50.38
    diethylene glycol 21.29
    diisopropyl ether 292.06
    tert-amyl alcohol 117.49
    acetylacetone 374.03
    n-hexadecane 65.73
    acetophenone 290.61
    methyl propionate 183.76
    isopentyl acetate 745.09
    trichloroethylene 733.09
    n-nonanol 117.42
    cyclohexanol 184.15
    benzyl alcohol 64.33
    2-ethylhexanol 203.94
    isooctanol 124.43
    dipropyl ether 1108.99
    1,2-dichlorobenzene 345.93
    ethyl lactate 92.04
    propylene carbonate 376.2
    n-methylformamide 20.16
    2-pentanol 63.95
    n-pentane 96.2
    1-propoxy-2-propanol 238.74
    1-methoxy-2-propyl acetate 524.96
    2-(2-methoxypropoxy) propanol 189.79
    mesitylene 186.85
    ε-caprolactone 648.16
    p-cymene 305.84
    epichlorohydrin 527.56
    1,1,1-trichloroethane 875.79
    2-aminoethanol 3.22
    morpholine-4-carbaldehyde 308.56
    sulfolane 958.97
    2,2,4-trimethylpentane 108.83
    2-methyltetrahydrofuran 832.57
    n-hexyl acetate 539.95
    isooctane 76.26
    2-(2-butoxyethoxy)ethanol 211.73
    sec-butyl acetate 451.02
    tert-butyl acetate 718.62
    decalin 254.03
    glycerin 5.47
    diglyme 710.49
    acrylic acid 22.1
    isopropyl myristate 325.54
    n-butyric acid 136.06
    acetyl acetate 228.94
    di(2-ethylhexyl) phthalate 125.4
    ethyl propionate 401.21
    nitromethane 69.14
    1,2-diethoxyethane 689.66
    benzonitrile 108.19
    trioctyl phosphate 119.62
    1-bromopropane 435.94
    gamma-valerolactone 594.17
    n-decanol 83.01
    triethyl phosphate 477.51
    4-methyl-2-pentanol 75.53
    propionitrile 47.21
    vinylene carbonate 210.6
    1,1,2-trichlorotrifluoroethane 243.62
    DMS 248.52
    cumene 140.22
    2-octanol 100.03
    2-hexanone 323.32
    octyl acetate 286.76
    limonene 670.48
    1,2-dimethoxyethane 348.21
    ethyl orthosilicate 526.72
    tributyl phosphate 181.77
    diacetone alcohol 305.38
    N,N-dimethylaniline 228.78
    acrylonitrile 33.76
    aniline 101.35
    1,3-propanediol 11.32
    bromobenzene 387.19
    dibromomethane 480.16
    1,1,2,2-tetrachloroethane 851.29
    2-methyl-cyclohexyl acetate 672.86
    tetrabutyl urea 278.89
    diisobutyl methanol 289.22
    2-phenylethanol 91.59
    styrene 163.21
    dioctyl adipate 389.79
    dimethyl sulfate 158.48
    ethyl butyrate 951.54
    methyl lactate 47.11
    butyl lactate 240.43
    diethyl carbonate 482.81
    propanediol butyl ether 67.28
    triethyl orthoformate 907.2
    p-tert-butyltoluene 304.5
    methyl 4-tert-butylbenzoate 392.97
    morpholine 304.65
    tert-butylamine 80.28
    n-dodecanol 65.91
    dimethoxymethane 145.68
    ethylene carbonate 240.29
    cyrene 180.22
    2-ethoxyethyl acetate 489.94
    2-ethylhexyl acetate 772.87
    1,2,4-trichlorobenzene 390.56
    4-methylpyridine 277.39
    dibutyl ether 788.74
    2,6-dimethyl-4-heptanol 289.22
    DEF 385.8
    dimethyl isosorbide 655.93
    tetrachloroethylene 499.0
    eugenol 180.96
    triacetin 492.16
    span 80 190.28
    1,4-butanediol 5.07
    1,1-dichloroethane 408.91
    2-methyl-1-pentanol 67.84
    methyl formate 21.78
    2-methyl-1-butanol 63.86
    n-decane 136.33
    butyronitrile 81.62
    3,7-dimethyl-1-octanol 179.95
    1-chlorooctane 325.1
    1-chlorotetradecane 113.62
    n-nonane 144.56
    undecane 75.4
    tert-butylcyclohexane 186.96
    cyclooctane 328.1
    cyclopentanol 150.51
    tetrahydropyran 708.79
    tert-amyl methyl ether 389.0
    2,5,8-trioxanonane 396.76
    1-hexene 178.83
    2-isopropoxyethanol 76.88
    2,2,2-trifluoroethanol 15.47
    methyl butyrate 476.32

    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
Apple flower Malus arnoldiana (Rehd) Sarg. var. Redgold, fam. Rosaceae 0.78%
Seafennel 89997-98-8 Crithmum maritimum L., fam. Apiaceae (Umbelliferae) 0.25%
Daphne genkwa Daphne genkwa Sieb. et Zucc., fam. Thymelaeaceae 0.01%
Osmanthus concentrate 2 (Sukhumi-Abkhasia) 68917-05-5 Osmanthus fragrans (Thunb.) Lour., fam. Oleaceae 0.02%
Geranium (Bulgaria) 8000-46-2 Pelargonium graveolens l'Herit. ex Aiton, fam. Geraniaceae 0.22%
Rosa centifolia (Poland) Rosa centifolia L., fam. Rosaceae 0.24%
Zingiber zerumbet (Vietnam) 2c flower Zingiber zerumbet (L.) Sm., fam. Zingiberaceae 0.5%
Nicotiana rustica flower Nicotiana rustica L, subgenus Rustica, var. brasilia, fam. Solanaceae 0.05%
Nicotiana forgetiana flower Nicotiana forgetiana Hort. ex Hensley (subgenus Petunioides), Solanaceae 2.73%
Fagraea berteriana flower Fagraea berteriana A. Gray ex Benth., fam. Potaliaceae 0.33%
Rhubarb root Rheum palmatum L., fam. Polygonaceae 1.0%
Salvia syriaca (Turkey) Salvia syriaca L., fam. Lamiaceae (Labiatea) 0.22%
Wiedemannia orientalis Wiedemannia orientalis Fisch. et Mey., fam. Lamiaceae (Labiatae) 1.14%
Rosa rugosa (China) 1 Rosa rugosa Thunb. (hybrids), fam. Rosaceae 0.05%
Keora (India) 4 Pandanus odoratissimus L. (P. fascicularis Lam.), fam. Pandanaceae 0.01%
Citronella ceylon (Zimbabwe) Cymbopogon nardus (L.) Rendle, fam. Poaceae (Gramineae) 2.12%
Rose (Bulgaria) 4a 8007-01-0 Rosa damascena Mill., fam. Rosaceae 0.1%
Rose (Bulgaria) 4b 8007-01-0 Rosa damascena Mill., fam. Rosaceae 1.5%
Rose (Bulgaria) 4c 8007-01-0 Rosa damascena Mill., fam. Rosaceae 0.4%
Premna serratifolia flower bud Premna serratifolia L. (P.obtusifolia Br.R., P.taitensis Sch.),Verbenaceae 0.05%
Clary sage (Hungary) 1a 8016-63-5 Salvia sclarea L., fam. Lamiaceae (Labiatae) 4.7%
Clary sage (Hungary) 1b 8016-63-5 Salvia sclarea L., fam. Lamiaceae (Labiatae) 2.5%
Mullilam leaf (India) Zanthoxylum rhetsa D.C. syn. Z. limonella (Dennst.) Alston, fam. Rutaceae 0.2%
Alpinia laosensis (Vietnam) Alpinia laosensis Gagnep., fam. Zingiberaceae 0.01%
Acacia caven flower Acacia caven (Mol.) Mol., fam. Mimosaceae (Leguminosae) 1.0%
Carrot umbel (Poland) 8015-88-1 Daucus carota L. ssp. carota, fam. Apiaceae (Umbelliferae) 0.02%
Rocket leaf 1 Eruca sativa L., fam. Brassicaceae 0.01%
Cerastium candidissimum (Greece) Cerastium candidissimum Correns, fam. Caryophyllaceae 0.4%