Octyltriethoxysilane

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  • Identifiers

    CAS number
    2943-75-1

    Molecular formula
    C14H32O3Si

    SMILES
    CCCCCCCC[Si](OCC)(OCC)OCC

    Safety labels

    Flammable
    Flammable

    Irritant
    Irritant

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Fruity 56.87%
    Floral 53.3%
    Fresh 51.72%
    Green 47.38%
    Oily 44.8%
    Citrus 44.63%
    Sweet 38.95%
    Waxy 38.63%
    Herbal 35.96%
    Fatty 34.8%

     

    Flavor
    Fruity 65.3%
    Green 60.95%
    Waxy 45.21%
    Sweet 37.78%
    Fatty 34.38%
    Tropical 34.29%
    Earthy 33.01%
    Oily 31.6%
    Floral 30.41%
    Wine 29.18%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    9.32 (weak base)

    Molecular weight
    276.49 g/mol

    Flash point

    • 100.9 ˚C est.

  • Synonyms

    • Triethoxyoctylsilane
    • Triethoxy(octyl)silane
    • 2943-75-1
    • Octyltriethoxysilane
    • triethoxycaprylylsilane
    • Octyl(triethoxy)silane
    • Dynasylan OCTEO
    • Prosil 9202
    • Silquest A 137
    • Prosil 9234
    • A 137 (coupling agent)
    • Caprylyltriethoxysilane
    • LDC331P08E
    • DTXSID2029246
    • NSC-42964
    • Y 9187
    • DTXCID909246
    • RefChem:899462
    • 220-941-2
    • Silane, Triethoxyoctyl-
    • n-Octyltriethoxysilane
    • MFCD00039883
    • Triethoxy-n-octylsilane
    • S12775
    • 156327-81-0
    • EINECS 220-941-2
    • NSC 42964
    • UNII-LDC331P08E
    • Ctyltriethoxysilane
    • triethoxycaprylsilane
    • N-Ctyltriethoxysilane
    • octyl-triethoxy-silane
    • Oleth-30
    • Triethoxy Ctyl Silane
    • Triethoxy(Ctyl)Silane
    • Triethoxy-N-Ctylsilane
    • 1-Triethoxysilyl octane
    • Union carbide A-137
    • EC 220-941-2
    • SCHEMBL26406
    • orb1306907
    • SCHEMBL5697488
    • SCHEMBL9312908
    • Triethoxy-n-octyltriethoxysilane
    • CHEMBL3185786
    • SCHEMBL27530832
    • SCHEMBL27562879
    • CHEBI:136012
    • NSC42964
    • Triethoxy(octyl)silane, >=97.5%
    • Tox21_303648
    • CO9835
    • MSK169628
    • AKOS015901613
    • DB11267
    • NCGC00164371-01
    • NCGC00164371-02
    • NCGC00257255-01
    • BS-16883
    • HY-91054
    • SY041526
    • CAS-2943-75-1
    • DB-047582
    • CS-0006246
    • NS00048604
    • O0171
    • Q27282931
    • Triethoxy(octyl)silane, deposition grade, 98%, 99.99% trace metals basis
    • 2943-75-1

  • Applications

    Octyltriethoxysilane (CAS 2943-75-1) is commonly used as a silane coupling agent to improve adhesion between coatings or polymers and inorganic substrates such as silica, glass, or stone; it also serves to modify silica fillers to enhance dispersion and interfacial bonding in polymer composites; it can impart hydrophobicity and moisture resistance to surfaces such as concrete and wood; it functions as a coupling/compatibilizing additive in adhesives and sealants to boost moisture resistance and bond strength; and it is employed in electronics and optics for moisture-barrier surface coatings and surface modification to promote adhesion of siloxane networks to inorganic components.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 6888.4
    methanol 5964.62
    isopropanol 7008.97
    water 1.18
    ethyl acetate 6475.79
    n-propanol 8585.49
    acetone 7713.69
    n-butanol 7297.56
    acetonitrile 4687.19
    DMF 7790.71
    toluene 4711.85
    isobutanol 6915.13
    1,4-dioxane 9950.63
    methyl acetate 5162.52
    THF 14231.91
    2-butanone 7113.57
    n-pentanol 5350.08
    sec-butanol 8227.77
    n-hexane 3690.85
    ethylene glycol 582.67
    NMP 7280.29
    cyclohexane 10369.81
    DMSO 7309.26
    n-butyl acetate 6430.16
    n-octanol 3305.41
    chloroform 24911.96
    n-propyl acetate 5436.79
    acetic acid 4000.29
    dichloromethane 20908.62
    cyclohexanone 14745.4
    propylene glycol 1315.53
    isopropyl acetate 4369.19
    DMAc 5849.07
    2-ethoxyethanol 4177.71
    isopentanol 5113.54
    n-heptane 3142.93
    ethyl formate 4166.76
    1,2-dichloroethane 12605.23
    n-hexanol 5510.49
    2-methoxyethanol 5351.53
    isobutyl acetate 3418.89
    tetrachloromethane 5472.4
    n-pentyl acetate 6489.37
    transcutol 5847.51
    n-heptanol 3449.81
    ethylbenzene 2310.3
    MIBK 3615.34
    2-propoxyethanol 4834.59
    tert-butanol 6966.81
    MTBE 7604.36
    2-butoxyethanol 3682.82
    propionic acid 4861.05
    o-xylene 2556.5
    formic acid 738.03
    diethyl ether 10821.8
    m-xylene 2480.57
    p-xylene 3228.74
    chlorobenzene 5722.28
    dimethyl carbonate 1536.66
    n-octane 1220.17
    formamide 1288.91
    cyclopentanone 10941.97
    2-pentanone 6467.02
    anisole 3025.13
    cyclopentyl methyl ether 9340.48
    gamma-butyrolactone 9983.94
    1-methoxy-2-propanol 4431.84
    pyridine 10176.73
    3-pentanone 5199.8
    furfural 6076.88
    n-dodecane 538.19
    diethylene glycol 1801.92
    diisopropyl ether 3213.78
    tert-amyl alcohol 6643.15
    acetylacetone 4335.38
    n-hexadecane 628.17
    acetophenone 2892.87
    methyl propionate 4589.23
    isopentyl acetate 5196.18
    trichloroethylene 17153.57
    n-nonanol 2651.51
    cyclohexanol 9795.56
    benzyl alcohol 2640.78
    2-ethylhexanol 3603.6
    isooctanol 2781.95
    dipropyl ether 6450.42
    1,2-dichlorobenzene 4714.9
    ethyl lactate 1488.94
    propylene carbonate 5309.59
    n-methylformamide 4027.25
    2-pentanol 5658.85
    n-pentane 3568.88
    1-propoxy-2-propanol 4296.41
    1-methoxy-2-propyl acetate 3258.84
    2-(2-methoxypropoxy) propanol 1603.77
    mesitylene 1757.45
    ε-caprolactone 11386.07
    p-cymene 1646.59
    epichlorohydrin 9721.99
    1,1,1-trichloroethane 12069.06
    2-aminoethanol 2003.87
    morpholine-4-carbaldehyde 5993.26
    sulfolane 9971.22
    2,2,4-trimethylpentane 1245.5
    2-methyltetrahydrofuran 13272.24
    n-hexyl acetate 6247.68
    isooctane 760.35
    2-(2-butoxyethoxy)ethanol 2620.11
    sec-butyl acetate 3501.56
    tert-butyl acetate 4198.58
    decalin 1768.85
    glycerin 1203.73
    diglyme 5507.61
    acrylic acid 2682.52
    isopropyl myristate 1941.42
    n-butyric acid 7797.74
    acetyl acetate 3230.61
    di(2-ethylhexyl) phthalate 1281.98
    ethyl propionate 3917.69
    nitromethane 5957.67
    1,2-diethoxyethane 5005.78
    benzonitrile 4305.59
    trioctyl phosphate 1294.82
    1-bromopropane 11543.22
    gamma-valerolactone 11313.33
    n-decanol 1653.86
    triethyl phosphate 1699.16
    4-methyl-2-pentanol 2533.48
    propionitrile 5955.13
    vinylene carbonate 4787.33
    1,1,2-trichlorotrifluoroethane 5485.18
    DMS 2329.47
    cumene 1469.54
    2-octanol 3235.19
    2-hexanone 5121.56
    octyl acetate 2407.65
    limonene 3353.01
    1,2-dimethoxyethane 7528.85
    ethyl orthosilicate 1790.28
    tributyl phosphate 1516.94
    diacetone alcohol 2982.91
    N,N-dimethylaniline 2133.21
    acrylonitrile 4615.87
    aniline 4070.04
    1,3-propanediol 3152.2
    bromobenzene 6909.43
    dibromomethane 16515.42
    1,1,2,2-tetrachloroethane 17005.55
    2-methyl-cyclohexyl acetate 3158.93
    tetrabutyl urea 2015.11
    diisobutyl methanol 2079.44
    2-phenylethanol 2456.17
    styrene 3001.06
    dioctyl adipate 2278.2
    dimethyl sulfate 2042.96
    ethyl butyrate 4348.84
    methyl lactate 1460.26
    butyl lactate 3161.03
    diethyl carbonate 2514.35
    propanediol butyl ether 2596.4
    triethyl orthoformate 3279.97
    p-tert-butyltoluene 1504.48
    methyl 4-tert-butylbenzoate 2507.48
    morpholine 13033.22
    tert-butylamine 5528.67
    n-dodecanol 1207.03
    dimethoxymethane 4987.71
    ethylene carbonate 5340.43
    cyrene 1818.74
    2-ethoxyethyl acetate 4432.07
    2-ethylhexyl acetate 4665.09
    1,2,4-trichlorobenzene 4940.62
    4-methylpyridine 8606.34
    dibutyl ether 5245.58
    2,6-dimethyl-4-heptanol 2079.44
    DEF 7109.01
    dimethyl isosorbide 2966.17
    tetrachloroethylene 11356.23
    eugenol 1976.48
    triacetin 3118.79
    span 80 2191.67
    1,4-butanediol 1653.44
    1,1-dichloroethane 13065.59
    2-methyl-1-pentanol 3834.18
    methyl formate 2564.7
    2-methyl-1-butanol 5808.54
    n-decane 1223.4
    butyronitrile 7379.4
    3,7-dimethyl-1-octanol 2616.96
    1-chlorooctane 3420.26
    1-chlorotetradecane 1037.36
    n-nonane 1435.28
    undecane 739.56
    tert-butylcyclohexane 1376.23
    cyclooctane 2693.57
    cyclopentanol 9133.99
    tetrahydropyran 19434.5
    tert-amyl methyl ether 5664.1
    2,5,8-trioxanonane 2725.71
    1-hexene 6384.04
    2-isopropoxyethanol 2888.22
    2,2,2-trifluoroethanol 1392.75
    methyl butyrate 5786.64

    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