Stearyl triethoxysilane

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  • Identifiers

    CAS number
    7399-00-0

    Molecular formula
    C24H52O3Si

    SMILES
    CCCCCCCCCCCCCCCCCC[Si](OCC)(OCC)OCC

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Waxy 58.65%
    Fruity 51.96%
    Oily 48.9%
    Fatty 48.25%
    Fresh 40.37%
    Citrus 34.3%
    Sweet 33.97%
    Floral 30.89%
    Woody 29.26%
    Clean 28.4%

     

    Flavor
    Waxy 61.02%
    Oily 41.82%
    Fatty 38.97%
    Mild 38.49%
    Soapy 32.85%
    Fruity 29.91%
    Floral 28.88%
    Clean 27.79%
    Fat 26.45%
    Mushroom 26.23%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    8.18 (weak base)

    Molecular weight
    416.8 g/mol

    Flash point

    • 167.83 ˚C est.

  • Synonyms

    • Octadecyltriethoxysilane
    • 7399-00-0
    • n-Octadecyltriethoxysilane
    • Triethoxyoctadecylsilane
    • stearyl triethoxysilane
    • stearyltriethoxysilane
    • Silane, triethoxyoctadecyl-
    • 1VN9P25L8H
    • EINECS 230-995-9
    • DTXSID90224778
    • RefChem:889181
    • DTXCID20147269
    • STEARYL TRIETHOXYSILANE [INCI]
    • 230-995-9
    • triethoxy(octadecyl)silane
    • octadecyl triethoxysilane
    • MFCD00039875
    • C24H52O3Si
    • Octadecyltriethoxysilane, 95%
    • s12300
    • Octadecyltriethoxysilane (>90%)
    • UNII-1VN9P25L8H
    • Triethoxystearylsilane
    • Ctadecyltriethoxysilane
    • N-Ctadecyltriethoxysilane
    • Triethoxy(Ctadecyl)Silane
    • SCHEMBL27108
    • Octadecyltriethoxysilane, tech.
    • AKOS015839778
    • n-Octadecyltriethoxysilane, AldrichCPR
    • FS-5024
    • SY049788
    • DB-055827
    • CS-0152203
    • NS00047111
    • O0165
    • I11388
    • Octadecyltriethoxysilane, 98%, n-isomer 85% min
    • Q27252959
    • 155828-83-4
    • 7399-00-0

  • Applications

    Stearyl triethoxysilane (CAS 7399-00-0) is a long-chain alkoxysilane used primarily as a silane coupling agent and surface modifier. It is applied to inorganic substrates (glass, silica, metals, ceramics) to impart hydrophobicity and to improve adhesion of coatings and paints; in polymers and composites it acts as a coupling and compatibilizing agent to enhance dispersion of inorganic fillers and adhesion to the polymer matrix; in coatings and inks it serves as a hydrophobic additive and a hydrolyzable crosslinking precursor in sol–gel systems; it can function as an intermediate precursor for siloxane-based surface modifiers and coatings; and it may be used in electronics-related coatings to improve moisture resistance and durability.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 609.79
    methanol 506.25
    isopropanol 754.13
    water 2.83
    ethyl acetate 2401.44
    n-propanol 998.32
    acetone 1873.62
    n-butanol 1076.23
    acetonitrile 738.71
    DMF 2283.47
    toluene 1325.75
    isobutanol 1043.45
    1,4-dioxane 2641.69
    methyl acetate 1599.53
    THF 5104.75
    2-butanone 2184.76
    n-pentanol 821.82
    sec-butanol 1277.32
    n-hexane 757.96
    ethylene glycol 60.88
    NMP 4533.89
    cyclohexane 3553.69
    DMSO 2280.02
    n-butyl acetate 2616.76
    n-octanol 1039.13
    chloroform 7678.86
    n-propyl acetate 2444.99
    acetic acid 897.07
    dichloromethane 7532.31
    cyclohexanone 6166.5
    propylene glycol 157.92
    isopropyl acetate 2134.87
    DMAc 3371.04
    2-ethoxyethanol 1014.31
    isopentanol 1093.31
    n-heptane 1002.98
    ethyl formate 1174.1
    1,2-dichloroethane 4542.23
    n-hexanol 780.95
    2-methoxyethanol 1089.6
    isobutyl acetate 1789.6
    tetrachloromethane 2643.48
    n-pentyl acetate 4231.42
    transcutol 2326.19
    n-heptanol 1067.84
    ethylbenzene 817.25
    MIBK 1676.06
    2-propoxyethanol 991.56
    tert-butanol 1108.12
    MTBE 2060.08
    2-butoxyethanol 1609.45
    propionic acid 1118.13
    o-xylene 1023.32
    formic acid 184.56
    diethyl ether 2189.86
    m-xylene 861.81
    p-xylene 1175.88
    chlorobenzene 2013.33
    dimethyl carbonate 715.83
    n-octane 456.3
    formamide 401.74
    cyclopentanone 5042.04
    2-pentanone 2260.54
    anisole 1166.47
    cyclopentyl methyl ether 4078.86
    gamma-butyrolactone 4689.48
    1-methoxy-2-propanol 1045.12
    pyridine 2820.4
    3-pentanone 2268.66
    furfural 2409.4
    n-dodecane 183.78
    diethylene glycol 329.77
    diisopropyl ether 1143.33
    tert-amyl alcohol 1477.41
    acetylacetone 2159.37
    n-hexadecane 225.03
    acetophenone 1486.62
    methyl propionate 1866.9
    isopentyl acetate 2468.84
    trichloroethylene 6437.21
    n-nonanol 957.41
    cyclohexanol 2667.1
    benzyl alcohol 763.02
    2-ethylhexanol 939.28
    isooctanol 1076.18
    dipropyl ether 2389.3
    1,2-dichlorobenzene 2036.57
    ethyl lactate 715.79
    propylene carbonate 2753.94
    n-methylformamide 995.88
    2-pentanol 1059.74
    n-pentane 722.06
    1-propoxy-2-propanol 1241.41
    1-methoxy-2-propyl acetate 1640.22
    2-(2-methoxypropoxy) propanol 717.38
    mesitylene 690.03
    ε-caprolactone 5280.98
    p-cymene 745.14
    epichlorohydrin 4088.01
    1,1,1-trichloroethane 5381.3
    2-aminoethanol 242.76
    morpholine-4-carbaldehyde 2924.95
    sulfolane 5881.72
    2,2,4-trimethylpentane 444.05
    2-methyltetrahydrofuran 4704.37
    n-hexyl acetate 3174.1
    isooctane 228.21
    2-(2-butoxyethoxy)ethanol 1099.74
    sec-butyl acetate 1935.31
    tert-butyl acetate 2284.83
    decalin 707.23
    glycerin 212.22
    diglyme 3131.37
    acrylic acid 713.62
    isopropyl myristate 1075.7
    n-butyric acid 2261.75
    acetyl acetate 1414.61
    di(2-ethylhexyl) phthalate 628.03
    ethyl propionate 2085.24
    nitromethane 1788.51
    1,2-diethoxyethane 2211.52
    benzonitrile 1238.66
    trioctyl phosphate 683.95
    1-bromopropane 3506.34
    gamma-valerolactone 5173.15
    n-decanol 589.96
    triethyl phosphate 1175.28
    4-methyl-2-pentanol 655.71
    propionitrile 1134.5
    vinylene carbonate 2229.72
    1,1,2-trichlorotrifluoroethane 2416.34
    DMS 1340.15
    cumene 619.75
    2-octanol 1117.61
    2-hexanone 2030.1
    octyl acetate 1294.76
    limonene 1466.64
    1,2-dimethoxyethane 2454.95
    ethyl orthosilicate 1233.76
    tributyl phosphate 819.85
    diacetone alcohol 1405.95
    N,N-dimethylaniline 925.74
    acrylonitrile 929.24
    aniline 1124.61
    1,3-propanediol 502.34
    bromobenzene 2550.23
    dibromomethane 5387.19
    1,1,2,2-tetrachloroethane 6327.24
    2-methyl-cyclohexyl acetate 1833.5
    tetrabutyl urea 1228.97
    diisobutyl methanol 753.92
    2-phenylethanol 672.22
    styrene 980.38
    dioctyl adipate 1311.67
    dimethyl sulfate 1283.38
    ethyl butyrate 2460.53
    methyl lactate 556.34
    butyl lactate 1856.78
    diethyl carbonate 1344.79
    propanediol butyl ether 926.7
    triethyl orthoformate 2097.75
    p-tert-butyltoluene 676.92
    methyl 4-tert-butylbenzoate 1594.46
    morpholine 3393.01
    tert-butylamine 970.79
    n-dodecanol 422.51
    dimethoxymethane 1635.64
    ethylene carbonate 2518.9
    cyrene 947.84
    2-ethoxyethyl acetate 2872.13
    2-ethylhexyl acetate 2335.48
    1,2,4-trichlorobenzene 2248.71
    4-methylpyridine 2602.12
    dibutyl ether 2357.84
    2,6-dimethyl-4-heptanol 753.92
    DEF 3067.44
    dimethyl isosorbide 1579.65
    tetrachloroethylene 4444.94
    eugenol 1036.53
    triacetin 2085.44
    span 80 998.68
    1,4-butanediol 258.05
    1,1-dichloroethane 4101.84
    2-methyl-1-pentanol 895.95
    methyl formate 729.12
    2-methyl-1-butanol 1214.33
    n-decane 464.6
    butyronitrile 1417.89
    3,7-dimethyl-1-octanol 907.73
    1-chlorooctane 1520.8
    1-chlorotetradecane 432.39
    n-nonane 506.13
    undecane 264.18
    tert-butylcyclohexane 499.44
    cyclooctane 1026.99
    cyclopentanol 2466.68
    tetrahydropyran 5385.89
    tert-amyl methyl ether 1957.13
    2,5,8-trioxanonane 1344.26
    1-hexene 1217.92
    2-isopropoxyethanol 911.17
    2,2,2-trifluoroethanol 556.53
    methyl butyrate 2802.96

    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