Trimethoxycaprylylsilane

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  • Identifiers

    CAS number
    3069-40-7

    Molecular formula
    C11H26O3Si

    SMILES
    CCCCCCCC[Si](OC)(OC)OC

    Safety labels

    Acute Toxic
    Acute Toxic

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Green 62.67%
    Fresh 56.41%
    Floral 55.35%
    Citrus 51.84%
    Waxy 50.12%
    Fruity 44.03%
    Oily 40.43%
    Sweet 37.23%
    Fatty 37.18%
    Herbal 36.68%

     

    Flavor
    Green 64.37%
    Fruity 57.69%
    Waxy 49.15%
    Floral 39.61%
    Sweet 35.42%
    Oily 33.03%
    Tropical 32.77%
    Earthy 31.32%
    Mushroom 31.29%
    Fatty 29.51%

     

    Odor impact est.
    Medium

  • Properties

    pKa est.
    10.57 (weak base)

    Molecular weight
    234.41 g/mol

    Flash point

    • 89.08 ˚C est.

  • Synonyms

    • 3069-40-7
    • Trimethoxyoctylsilane
    • Octyltrimethoxysilane
    • Trimethoxycaprylylsilane
    • Silane, trimethoxyoctyl-
    • FZ07E4LW2M
    • EINECS 221-338-7
    • DTXSID80863094
    • EC 221-338-7
    • RefChem:899730
    • DTXCID70811766
    • TRIMETHOXYCAPRYLYLSILANE [INCI]
    • 221-338-7
    • Trimethoxy(octyl)silane
    • N-Octyltrimethoxysilane
    • MFCD00043053
    • Trimethoxy-n-octylsilane
    • S12800
    • 1-(Trimethoxysilyl)octane
    • UNII-FZ07E4LW2M
    • trimethoxy-octylsilane
    • N-Ctyltrimethoxysilane
    • Trimethoxy(Ctyl)Silane
    • Trimethoxy-N-Ctylsilane
    • SCHEMBL35912
    • Trimethoxy(octyl)silane, 96%
    • SCHEMBL8433522
    • SCHEMBL23248772
    • SCHEMBL27562882
    • NMEPHPOFYLLFTK-UHFFFAOYSA-
    • NMEPHPOFYLLFTK-UHFFFAOYSA-N
    • AKOS015901639
    • DS-4069
    • CS-0147110
    • NS00046359
    • T2875
    • D70369
    • Q27278303
    • InChI=1/C11H26O3Si/c1-5-6-7-8-9-10-11-15(12-2,13-3)14-4/h5-11H2,1-4H3
    • 3069-40-7

  • Applications

    Trimethoxycaprylylsilane (CAS 3069-40-7) is primarily used as a silane coupling agent and surface modifier to promote adhesion between inorganic substrates and organic polymers. In coatings and inks, it improves wetting and adhesion to glass and metal oxides and can impart hydrophobic surface characteristics. In adhesives and sealants, it acts as an adhesion promoter and a crosslinking co-monomer that enhances bond durability on mixed substrates. In polymer formulations, it serves as a compatibilizer or surface modifier for inorganic fillers (such as silica) to improve dispersion and mechanical properties. In construction materials, it enhances adhesion of coatings and sealants to concrete or masonry substrates. It may also be used in electronics-related coatings to improve interfacial adhesion and moisture resistance.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 7087.04
    methanol 7583.2
    isopropanol 5282.07
    water 3.36
    ethyl acetate 3736.02
    n-propanol 6787.91
    acetone 3625.54
    n-butanol 5684.62
    acetonitrile 2990.29
    DMF 4083.51
    toluene 1332.46
    isobutanol 4241.37
    1,4-dioxane 6392.94
    methyl acetate 2800.13
    THF 7209.33
    2-butanone 3219.11
    n-pentanol 3534.81
    sec-butanol 4946.47
    n-hexane 685.16
    ethylene glycol 672.19
    NMP 2357.71
    cyclohexane 2000.81
    DMSO 3773.23
    n-butyl acetate 3539.52
    n-octanol 1633.46
    chloroform 10796.86
    n-propyl acetate 2914.48
    acetic acid 3853.73
    dichloromethane 7937.86
    cyclohexanone 4801.33
    propylene glycol 1348.72
    isopropyl acetate 2443.56
    DMAc 2509.05
    2-ethoxyethanol 4315.97
    isopentanol 3646.98
    n-heptane 789.1
    ethyl formate 2913.09
    1,2-dichloroethane 4537.37
    n-hexanol 3440.61
    2-methoxyethanol 6132.15
    isobutyl acetate 1728.73
    tetrachloromethane 2270.9
    n-pentyl acetate 2765.48
    transcutol 5319.5
    n-heptanol 2100.93
    ethylbenzene 651.2
    MIBK 1755.05
    2-propoxyethanol 3906.05
    tert-butanol 5584.92
    MTBE 4751.8
    2-butoxyethanol 3098.63
    propionic acid 3197.08
    o-xylene 821.8
    formic acid 1285.01
    diethyl ether 5870.42
    m-xylene 804.92
    p-xylene 875.6
    chlorobenzene 1707.19
    dimethyl carbonate 729.7
    n-octane 316.8
    formamide 1963.04
    cyclopentanone 3794.63
    2-pentanone 3011.45
    anisole 1319.16
    cyclopentyl methyl ether 3718.75
    gamma-butyrolactone 3767.28
    1-methoxy-2-propanol 3894.1
    pyridine 3615.34
    3-pentanone 1983.34
    furfural 2915.01
    n-dodecane 131.33
    diethylene glycol 1854.71
    diisopropyl ether 1550.37
    tert-amyl alcohol 4387.8
    acetylacetone 2078.98
    n-hexadecane 151.35
    acetophenone 1099.13
    methyl propionate 2221.42
    isopentyl acetate 2711.09
    trichloroethylene 7154.81
    n-nonanol 1312.34
    cyclohexanol 4437.75
    benzyl alcohol 1299.23
    2-ethylhexanol 1882.42
    isooctanol 1738.14
    dipropyl ether 2972.52
    1,2-dichlorobenzene 1460.71
    ethyl lactate 968.91
    propylene carbonate 2311.55
    n-methylformamide 3128.22
    2-pentanol 3513.84
    n-pentane 919.09
    1-propoxy-2-propanol 3163.41
    1-methoxy-2-propyl acetate 1897.17
    2-(2-methoxypropoxy) propanol 956.33
    mesitylene 613.66
    ε-caprolactone 4277.43
    p-cymene 654.76
    epichlorohydrin 4830.95
    1,1,1-trichloroethane 4661.33
    2-aminoethanol 2354.38
    morpholine-4-carbaldehyde 3264.85
    sulfolane 3461.7
    2,2,4-trimethylpentane 451.64
    2-methyltetrahydrofuran 5832.04
    n-hexyl acetate 2559.78
    isooctane 334.29
    2-(2-butoxyethoxy)ethanol 1884.73
    sec-butyl acetate 1830.42
    tert-butyl acetate 2522.03
    decalin 416.63
    glycerin 1399.04
    diglyme 4296.33
    acrylic acid 1913.49
    isopropyl myristate 690.68
    n-butyric acid 5685.09
    acetyl acetate 1691.0
    di(2-ethylhexyl) phthalate 519.22
    ethyl propionate 1883.85
    nitromethane 4910.79
    1,2-diethoxyethane 3198.58
    benzonitrile 1724.35
    trioctyl phosphate 508.3
    1-bromopropane 3678.3
    gamma-valerolactone 5207.42
    n-decanol 785.0
    triethyl phosphate 771.67
    4-methyl-2-pentanol 1603.33
    propionitrile 3124.3
    vinylene carbonate 2226.54
    1,1,2-trichlorotrifluoroethane 3531.25
    DMS 850.25
    cumene 486.37
    2-octanol 1610.91
    2-hexanone 2436.2
    octyl acetate 917.58
    limonene 1252.06
    1,2-dimethoxyethane 5294.86
    ethyl orthosilicate 957.74
    tributyl phosphate 586.24
    diacetone alcohol 2112.63
    N,N-dimethylaniline 842.34
    acrylonitrile 2692.01
    aniline 1715.55
    1,3-propanediol 3788.66
    bromobenzene 1777.67
    dibromomethane 5799.2
    1,1,2,2-tetrachloroethane 7181.65
    2-methyl-cyclohexyl acetate 1414.14
    tetrabutyl urea 722.81
    diisobutyl methanol 1129.7
    2-phenylethanol 1260.37
    styrene 829.38
    dioctyl adipate 798.9
    dimethyl sulfate 916.03
    ethyl butyrate 2260.29
    methyl lactate 945.8
    butyl lactate 1651.98
    diethyl carbonate 1244.6
    propanediol butyl ether 1820.11
    triethyl orthoformate 1792.19
    p-tert-butyltoluene 671.1
    methyl 4-tert-butylbenzoate 1122.19
    morpholine 8381.52
    tert-butylamine 4044.54
    n-dodecanol 529.21
    dimethoxymethane 3031.5
    ethylene carbonate 2403.72
    cyrene 946.97
    2-ethoxyethyl acetate 2278.42
    2-ethylhexyl acetate 2176.52
    1,2,4-trichlorobenzene 1594.17
    4-methylpyridine 2988.97
    dibutyl ether 2136.94
    2,6-dimethyl-4-heptanol 1129.7
    DEF 3131.02
    dimethyl isosorbide 1466.63
    tetrachloroethylene 4674.57
    eugenol 977.81
    triacetin 1306.67
    span 80 1214.53
    1,4-butanediol 1518.18
    1,1-dichloroethane 4799.65
    2-methyl-1-pentanol 2390.62
    methyl formate 1795.71
    2-methyl-1-butanol 3694.77
    n-decane 333.99
    butyronitrile 4239.55
    3,7-dimethyl-1-octanol 1321.14
    1-chlorooctane 1115.16
    1-chlorotetradecane 287.31
    n-nonane 367.86
    undecane 188.34
    tert-butylcyclohexane 399.65
    cyclooctane 609.82
    cyclopentanol 4037.21
    tetrahydropyran 8050.01
    tert-amyl methyl ether 3076.4
    2,5,8-trioxanonane 1811.47
    1-hexene 1722.55
    2-isopropoxyethanol 2634.54
    2,2,2-trifluoroethanol 1307.02
    methyl butyrate 2873.64

    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