Triethoxymethylsilane

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  • Identifiers

    CAS number
    2031-67-6

    Molecular formula
    C7H18O3Si

    SMILES
    CCO[Si](C)(OCC)OCC

    Safety labels

    Flammable
    Flammable

  • Odor profile

    Fragrance
    Fruity 65.08%
    Ethereal 53.71%
    Alcoholic 40.55%
    Fresh 38.15%
    Sweet 32.92%
    Green 26.19%
    Winey 24.25%
    Odorless 23.29%
    Pungent 23.15%
    Fermented 23.09%

     

    Flavor
    Green 69.65%
    Sweet 64.8%
    Fruity 48.24%
    Earthy 46.88%
    Fruit 45.61%
    Vegetable 45.12%
    Ether 39.49%
    Fatty 29.44%
    Sharp 27.86%
    Alcoholic 27.68%

     

    Odor impact est.
    Medium

  • Properties

    pKa est.
    10.48 (weak base)

    Molecular weight
    178.3 g/mol

    Flash point

    • 28.87 ˚C est.

  • Synonyms

    • Methyltriethoxysilane
    • Triethoxymethylsilane
    • 2031-67-6
    • Triethoxy(methyl)silane
    • Methyl triethoxysilane
    • Silane, triethoxymethyl-
    • Triethoxysilylmethane
    • Union carbide A-162
    • ICI-EP 5850
    • SILANE, METHYLTRIETHOXY-
    • MTES
    • A 162
    • Methaneorthosiliconic acid, triethyl ester
    • NSC 5226
    • MFCD00009066
    • N811L6SAVL
    • DTXSID6042490
    • NSC5226
    • NSC-5226
    • Dynasylan MTES
    • CCRIS 1323
    • EINECS 217-983-9
    • UNII-N811L6SAVL
    • BRN 1742453
    • CM9050
    • methyl triethoxy silane
    • methyl(triethoxy)silane
    • EC 217-983-9
    • Triethoxymethylsilane, 99%
    • CH3Si(OC2H5)3
    • SCHEMBL34977
    • 4-04-00-04204 (Beilstein Handbook Reference)
    • SILANE,METHYL,TRIETHOXY
    • SCHEMBL1896529
    • CHEMBL3184635
    • DTXCID4022490
    • SCHEMBL15194548
    • ISI0950
    • WLN: 2O-SI-1&O2&O2
    • Tox21_301310
    • AKOS008901250
    • NCGC00255877-01
    • LS-13393
    • CAS-2031-67-6
    • DB-045173
    • M0451
    • NS00045103
    • Triethoxymethylsilane, technical grade, 90%
    • EN300-213675
    • A814434
    • Q27284679
    • InChI=1/C7H18O3Si/c1-5-8-11(4,9-6-2)10-7-3/h5-7H2,1-4H
    • 25930-91-0
    • 2031-67-6

  • Applications

    Triethoxymethylsilane (CAS 2031-67-6) is a functional alkoxysilane with three ethoxy groups that acts as a crosslinking/bridging agent to form siloxane networks via hydrolysis and condensation in coatings, adhesives, and silicone resins. It is commonly used as an intermediate in the synthesis of organosilicon compounds, enabling the introduction of methyl groups into polymer and siloxane chains. It can be used for surface treatment of inorganic substrates such as glass and metal oxides to improve adhesion and compatibility with organic coatings. In sol-gel processes, it serves as a precursor to methyl-substituted silica networks, enabling tuning of surface properties such as hydrophobicity and barrier performance. Additionally, it may be used to tailor surface properties of silicone-based coatings, contributing to controlled crosslink density and hydrophobic character.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1251.56
    methanol 1809.09
    isopropanol 1082.74
    water 17.17
    ethyl acetate 657.48
    n-propanol 1298.34
    acetone 842.89
    n-butanol 958.06
    acetonitrile 818.71
    DMF 1531.12
    toluene 614.31
    isobutanol 860.61
    1,4-dioxane 1565.38
    methyl acetate 692.12
    THF 2141.58
    2-butanone 850.03
    n-pentanol 708.75
    sec-butanol 1147.68
    n-hexane 407.41
    ethylene glycol 368.37
    NMP 1642.59
    cyclohexane 947.22
    DMSO 1350.16
    n-butyl acetate 567.03
    n-octanol 522.6
    chloroform 4161.4
    n-propyl acetate 504.91
    acetic acid 945.9
    dichloromethane 3395.65
    cyclohexanone 1766.19
    propylene glycol 500.83
    isopropyl acetate 411.74
    DMAc 1128.16
    2-ethoxyethanol 694.26
    isopentanol 596.43
    n-heptane 366.79
    ethyl formate 605.99
    1,2-dichloroethane 1671.75
    n-hexanol 767.54
    2-methoxyethanol 1198.09
    isobutyl acetate 335.27
    tetrachloromethane 943.61
    n-pentyl acetate 584.46
    transcutol 779.03
    n-heptanol 468.24
    ethylbenzene 344.28
    MIBK 369.53
    2-propoxyethanol 853.16
    tert-butanol 982.02
    MTBE 730.42
    2-butoxyethanol 542.26
    propionic acid 881.7
    o-xylene 422.77
    formic acid 428.85
    diethyl ether 1014.21
    m-xylene 360.64
    p-xylene 471.19
    chlorobenzene 830.07
    dimethyl carbonate 278.57
    n-octane 177.49
    formamide 551.17
    cyclopentanone 1632.08
    2-pentanone 676.65
    anisole 498.61
    cyclopentyl methyl ether 1129.71
    gamma-butyrolactone 1687.13
    1-methoxy-2-propanol 865.64
    pyridine 1426.82
    3-pentanone 621.27
    furfural 1345.66
    n-dodecane 117.96
    diethylene glycol 575.6
    diisopropyl ether 308.0
    tert-amyl alcohol 914.14
    acetylacetone 546.08
    n-hexadecane 130.0
    acetophenone 486.53
    methyl propionate 604.69
    isopentyl acetate 465.78
    trichloroethylene 2350.08
    n-nonanol 448.79
    cyclohexanol 1292.9
    benzyl alcohol 488.69
    2-ethylhexanol 468.84
    isooctanol 369.68
    dipropyl ether 655.1
    1,2-dichlorobenzene 754.77
    ethyl lactate 284.56
    propylene carbonate 857.76
    n-methylformamide 936.46
    2-pentanol 699.77
    n-pentane 443.23
    1-propoxy-2-propanol 615.6
    1-methoxy-2-propyl acetate 401.91
    2-(2-methoxypropoxy) propanol 355.7
    mesitylene 255.52
    ε-caprolactone 1356.4
    p-cymene 282.51
    epichlorohydrin 1550.06
    1,1,1-trichloroethane 1505.12
    2-aminoethanol 680.8
    morpholine-4-carbaldehyde 1256.55
    sulfolane 1994.34
    2,2,4-trimethylpentane 170.07
    2-methyltetrahydrofuran 1604.3
    n-hexyl acetate 708.44
    isooctane 96.61
    2-(2-butoxyethoxy)ethanol 472.74
    sec-butyl acetate 341.21
    tert-butyl acetate 423.69
    decalin 241.52
    glycerin 565.16
    diglyme 830.77
    acrylic acid 714.22
    isopropyl myristate 303.09
    n-butyric acid 958.93
    acetyl acetate 394.23
    di(2-ethylhexyl) phthalate 256.9
    ethyl propionate 449.46
    nitromethane 1120.24
    1,2-diethoxyethane 518.83
    benzonitrile 725.39
    trioctyl phosphate 238.37
    1-bromopropane 1339.05
    gamma-valerolactone 1698.62
    n-decanol 326.39
    triethyl phosphate 277.99
    4-methyl-2-pentanol 318.95
    propionitrile 928.79
    vinylene carbonate 904.65
    1,1,2-trichlorotrifluoroethane 1131.58
    DMS 380.63
    cumene 241.13
    2-octanol 434.7
    2-hexanone 527.49
    octyl acetate 389.66
    limonene 473.02
    1,2-dimethoxyethane 1135.91
    ethyl orthosilicate 278.53
    tributyl phosphate 252.97
    diacetone alcohol 419.05
    N,N-dimethylaniline 409.97
    acrylonitrile 982.66
    aniline 674.76
    1,3-propanediol 728.16
    bromobenzene 905.06
    dibromomethane 2576.16
    1,1,2,2-tetrachloroethane 2205.45
    2-methyl-cyclohexyl acetate 437.86
    tetrabutyl urea 353.62
    diisobutyl methanol 286.44
    2-phenylethanol 474.48
    styrene 433.18
    dioctyl adipate 376.43
    dimethyl sulfate 435.81
    ethyl butyrate 453.49
    methyl lactate 339.5
    butyl lactate 398.56
    diethyl carbonate 328.08
    propanediol butyl ether 452.72
    triethyl orthoformate 387.69
    p-tert-butyltoluene 284.84
    methyl 4-tert-butylbenzoate 470.32
    morpholine 1758.38
    tert-butylamine 820.87
    n-dodecanol 253.97
    dimethoxymethane 885.06
    ethylene carbonate 832.94
    cyrene 447.77
    2-ethoxyethyl acetate 481.28
    2-ethylhexyl acetate 461.32
    1,2,4-trichlorobenzene 890.66
    4-methylpyridine 1201.5
    dibutyl ether 558.49
    2,6-dimethyl-4-heptanol 286.44
    DEF 816.38
    dimethyl isosorbide 614.05
    tetrachloroethylene 1539.34
    eugenol 439.84
    triacetin 466.9
    span 80 454.01
    1,4-butanediol 377.38
    1,1-dichloroethane 1598.2
    2-methyl-1-pentanol 488.4
    methyl formate 643.39
    2-methyl-1-butanol 692.15
    n-decane 204.12
    butyronitrile 889.44
    3,7-dimethyl-1-octanol 415.98
    1-chlorooctane 490.28
    1-chlorotetradecane 204.32
    n-nonane 219.17
    undecane 147.22
    tert-butylcyclohexane 199.36
    cyclooctane 296.36
    cyclopentanol 1392.32
    tetrahydropyran 1999.14
    tert-amyl methyl ether 630.79
    2,5,8-trioxanonane 575.19
    1-hexene 640.85
    2-isopropoxyethanol 458.67
    2,2,2-trifluoroethanol 421.65
    methyl butyrate 600.46

    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