Ethyl silicate

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  • Identifiers

    CAS number
    78-10-4

    Molecular formula
    C8H20O4Si

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

    Safety labels

    Flammable
    Flammable

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Fruity 48.38%
    Ethereal 47.68%
    Alcoholic 38.59%
    Sweet 34.06%
    Fresh 33.86%
    Odorless 31.88%
    Solvent 21.19%
    Winey 20.3%
    Fermented 19.74%
    Pungent 19.18%

     

    Flavor
    Green 61.17%
    Sweet 58.02%
    Fruity 51.94%
    Earthy 41.3%
    Fruit 41.19%
    Vegetable 40.25%
    Fatty 34.13%
    Ether 33.07%
    Wine 27.15%
    Sharp 26.57%

     

    Odor impact est.
    Medium

    Odor threshold

    • Odor Threshold Low: 3.6 [mmHg]. Detection odor threshold from AIHA (mean = 3.6 ppm)
    • Water: decomposes in water; air: 17 uL/L; odor safety class D; D = 10-50% of distracted persons can detect TLV concn in the air.
    • 85 ppm

  • Properties

    pKa est.
    9.69 (weak base)

    Molecular weight
    208.33 g/mol

    Melting point expt.

    • -121.9 °F (USCG, 1999)
    • -82.5 °C
    • -77 °C
    • -117 °F

    Boiling point

    • 336 °F at 760 mmHg (USCG, 1999)
    • 168.8 °C
    • 168 °C
    • 336 °F

    Flash point

    • 49.82 ˚C est.
    • 99 °F (USCG, 1999)
    • 99 °F
    • 125 °F (52 °C) (Open cup)
    • 99 °F (Closed cup)
    • 37 °CC, closed-cup
    • 37 °C c.c.

    Solubility expt.

    • Reacts with water (NIOSH, 2024)
    • Soluble in ether
    • Slightly soluble in benzene
    • Miscible with alcohol
    • Decomposes in water
    • Solubility in water: slowly hydrolyzes
    • Reacts

  • Synonyms

    • Tetraethyl orthosilicate
    • Tetraethoxysilane
    • Tetraethyl silicate
    • 78-10-4
    • TEOS
    • ETHYL SILICATE
    • Silicon ethoxide
    • Dynasil A
    • Silicon tetraethoxide
    • Tetraethoxysilicon
    • Silikan L
    • Ethyl orthosilicate
    • Etylu krzemian
    • Tetraethylsilikat
    • Silane, tetraethoxy-
    • Tetraethylorthosilicate
    • Silicic acid, tetraethyl ester
    • Silicate d'ethyle
    • Silicate tetraethylique
    • Silicic acid (H4SiO4), tetraethyl ester
    • ES 28 (ester)
    • Ethyl silicate, ((EtO)4Si)
    • Tetraethyl-O-silicate
    • Etylu krzemian [Polish]
    • Tetraethylsilikat [Czech]
    • ES 28
    • Silicate d'ethyle [French]
    • NSC 4790
    • ES 100
    • HSDB 534
    • Silicate tetraethylique [French]
    • TEOS (VAN)
    • Orthosilicic acid, tetraethyl ester
    • EINECS 201-083-8
    • MFCD00009062
    • UN1292
    • BRN 1422225
    • CCRIS 8482
    • DTXSID6026450
    • Tetraethoxysilicon(IV)
    • AI3-15098
    • Silicic acid, (H4SiO4), tetraethyl ester
    • NSC-4790
    • 42064KRE49
    • ETHYL SILICATE [MI]
    • DTXCID906450
    • BOTDANWDWHJENH-UHFFFAOYSA-
    • Orthosilicic acid tetraethyl ester
    • EC 201-083-8
    • TETRAETHYL SILICATE [HSDB]
    • Etylu krzemian (Polish)
    • Tetraethylsilikat (Czech)
    • TEOS [VAN]
    • Silicate d'ethyle (French)
    • Silicate tetraethylique (French)
    • Silibone
    • UNII-42064KRE49
    • tetraethoxy silane
    • R-(E,E)]-7-[4-(Dimethylamino)phenyl]-N-hydroxy-4,6-dimethyl-7-oxo-2,4-heptadienamide;
    • TetraethylOsilicate
    • tetra(ethoxy)silane
    • Silane, tetraethoxy
    • SILIBOND
    • ES 28 ester
    • tetrakis(ethoxy)silane
    • CONSERVARE OH
    • STEINFESTIGER OH
    • tetraethylortho silicate
    • Si(OEt)4
    • Silicic acid,ethyl ester
    • tetraethyl-ortho-silicate
    • ETHYL SILICATE 28
    • ETHYL SILICATE 40
    • SCHEMBL17680
    • (C2H5O)4Si
    • Si(OC2H5)4
    • Silicic acid tetraethyl ester
    • ES 100 (SILICATE)
    • Ethyl silicate (ACGIH:OSHA)
    • KBE 04
    • TES 28
    • CHEMBL3187981
    • NSC4790
    • DTXSID301304393
    • SI 42
    • ETHYL SILICATE ((ETO)4SI)
    • STR05461
    • TSL 8124
    • WLN: 2O-SI-O2&O2&O2
    • Tox21_200426
    • SILICON ETHOXIDE (SI(OET)4)
    • AKOS000269012
    • LS 2430
    • SILICIC ACID, TETRA-ETHYL ESTER
    • TETRAETHYL ORTHOSILICATE [INCI]
    • UN 1292
    • CAS-78-10-4
    • s15425
    • NCGC00248607-01
    • NCGC00257980-01
    • ETHYL, 1-[(TRIETHOXYSILYL)OXY]-
    • SILICON TETRAETHOXIDE (SI(OET)4)
    • Tetraethyl orthosilicate, >=99.0% (GC)
    • NS00041218
    • T0100
    • EN300-19960
    • Tetraethyl orthosilicate, reagent grade, 98%
    • Q421458
    • Tetraethyl silicate [UN1292] [Flammable liquid]
    • Tetraethyl orthosilicate, 99.999% trace metals basis
    • Tetraethyl orthosilicate, SAJ first grade, >=95.0%
    • F0001-2050
    • Tetraethyl orthosilicate, packaged for use in deposition systems
    • 201-083-8
    • 76063-52-0

  • Applications

    Ethyl silicate (CAS 78-10-4) is primarily used as a silica precursor in sol-gel processes to form SiO2 networks; in coatings and sealants it acts as a binder and crosslinker to yield hard, chemically resistant inorganic-organic hybrid films on metals, glass, wood, and masonry substrates; it also serves as a source of thin silica coatings in electronics and optics for dielectric or protective layers; in polymers and composites it enables silica-reinforced hybrids that improve thermal and mechanical properties; in adhesives and sealants it enhances adhesion, weather resistance, and rigidity by forming siloxane networks.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1101.92
    methanol 1338.2
    isopropanol 1083.47
    water 10.59
    ethyl acetate 865.26
    n-propanol 1124.39
    acetone 1265.47
    n-butanol 858.03
    acetonitrile 956.23
    DMF 2671.09
    toluene 757.42
    isobutanol 841.33
    1,4-dioxane 1936.62
    methyl acetate 973.35
    THF 2399.55
    2-butanone 1134.18
    n-pentanol 735.85
    sec-butanol 1127.88
    n-hexane 330.83
    ethylene glycol 383.69
    NMP 2392.54
    cyclohexane 809.42
    DMSO 2302.18
    n-butyl acetate 781.26
    n-octanol 732.1
    chloroform 6559.73
    n-propyl acetate 724.67
    acetic acid 1209.44
    dichloromethane 4977.58
    cyclohexanone 2183.62
    propylene glycol 535.9
    isopropyl acetate 570.05
    DMAc 1671.04
    2-ethoxyethanol 820.36
    isopentanol 606.75
    n-heptane 343.57
    ethyl formate 863.9
    1,2-dichloroethane 2595.96
    n-hexanol 761.34
    2-methoxyethanol 1275.16
    isobutyl acetate 468.74
    tetrachloromethane 1282.22
    n-pentyl acetate 944.73
    transcutol 823.4
    n-heptanol 637.62
    ethylbenzene 475.78
    MIBK 484.96
    2-propoxyethanol 912.69
    tert-butanol 1072.78
    MTBE 799.2
    2-butoxyethanol 707.01
    propionic acid 1164.05
    o-xylene 532.55
    formic acid 468.93
    diethyl ether 974.01
    m-xylene 430.95
    p-xylene 671.41
    chlorobenzene 1384.85
    dimethyl carbonate 497.03
    n-octane 209.48
    formamide 737.03
    cyclopentanone 2196.21
    2-pentanone 860.11
    anisole 695.84
    cyclopentyl methyl ether 1169.78
    gamma-butyrolactone 2457.1
    1-methoxy-2-propanol 993.97
    pyridine 2144.79
    3-pentanone 797.66
    furfural 2019.37
    n-dodecane 156.24
    diethylene glycol 581.36
    diisopropyl ether 348.83
    tert-amyl alcohol 984.72
    acetylacetone 852.2
    n-hexadecane 175.44
    acetophenone 729.27
    methyl propionate 841.98
    isopentyl acetate 641.41
    trichloroethylene 4275.09
    n-nonanol 640.45
    cyclohexanol 1342.99
    benzyl alcohol 715.91
    2-ethylhexanol 520.8
    isooctanol 510.85
    dipropyl ether 684.85
    1,2-dichlorobenzene 1289.63
    ethyl lactate 421.25
    propylene carbonate 1344.96
    n-methylformamide 1402.45
    2-pentanol 687.79
    n-pentane 352.4
    1-propoxy-2-propanol 756.06
    1-methoxy-2-propyl acetate 568.91
    2-(2-methoxypropoxy) propanol 456.66
    mesitylene 325.33
    ε-caprolactone 1799.12
    p-cymene 372.32
    epichlorohydrin 2247.01
    1,1,1-trichloroethane 2366.33
    2-aminoethanol 646.78
    morpholine-4-carbaldehyde 1794.08
    sulfolane 3196.81
    2,2,4-trimethylpentane 169.31
    2-methyltetrahydrofuran 1698.97
    n-hexyl acetate 1065.67
    isooctane 103.77
    2-(2-butoxyethoxy)ethanol 609.89
    sec-butyl acetate 446.13
    tert-butyl acetate 573.15
    decalin 267.93
    glycerin 595.5
    diglyme 1134.0
    acrylic acid 1071.49
    isopropyl myristate 440.18
    n-butyric acid 1197.95
    acetyl acetate 604.06
    di(2-ethylhexyl) phthalate 377.31
    ethyl propionate 611.54
    nitromethane 1712.59
    1,2-diethoxyethane 654.19
    benzonitrile 1099.62
    trioctyl phosphate 364.29
    1-bromopropane 1626.67
    gamma-valerolactone 2454.47
    n-decanol 462.11
    triethyl phosphate 395.4
    4-methyl-2-pentanol 350.66
    propionitrile 1071.58
    vinylene carbonate 1484.78
    1,1,2-trichlorotrifluoroethane 1895.26
    DMS 626.46
    cumene 316.39
    2-octanol 633.46
    2-hexanone 696.47
    octyl acetate 583.14
    limonene 549.14
    1,2-dimethoxyethane 1442.69
    ethyl orthosilicate 372.72
    tributyl phosphate 373.18
    diacetone alcohol 563.25
    N,N-dimethylaniline 581.3
    acrylonitrile 1307.97
    aniline 866.56
    1,3-propanediol 736.58
    bromobenzene 1577.46
    dibromomethane 3621.14
    1,1,2,2-tetrachloroethane 3981.47
    2-methyl-cyclohexyl acetate 573.45
    tetrabutyl urea 531.1
    diisobutyl methanol 327.93
    2-phenylethanol 640.15
    styrene 614.63
    dioctyl adipate 556.2
    dimethyl sulfate 800.89
    ethyl butyrate 590.15
    methyl lactate 507.48
    butyl lactate 636.82
    diethyl carbonate 450.7
    propanediol butyl ether 663.44
    triethyl orthoformate 505.9
    p-tert-butyltoluene 370.49
    methyl 4-tert-butylbenzoate 746.4
    morpholine 2088.36
    tert-butylamine 791.24
    n-dodecanol 355.83
    dimethoxymethane 1225.66
    ethylene carbonate 1231.5
    cyrene 622.35
    2-ethoxyethyl acetate 768.45
    2-ethylhexyl acetate 618.26
    1,2,4-trichlorobenzene 1576.65
    4-methylpyridine 1714.7
    dibutyl ether 659.62
    2,6-dimethyl-4-heptanol 327.93
    DEF 1156.27
    dimethyl isosorbide 748.6
    tetrachloroethylene 2584.73
    eugenol 657.72
    triacetin 741.34
    span 80 617.08
    1,4-butanediol 432.0
    1,1-dichloroethane 2403.99
    2-methyl-1-pentanol 543.3
    methyl formate 1034.11
    2-methyl-1-butanol 704.22
    n-decane 262.96
    butyronitrile 1036.99
    3,7-dimethyl-1-octanol 509.63
    1-chlorooctane 708.04
    1-chlorotetradecane 296.55
    n-nonane 278.22
    undecane 191.34
    tert-butylcyclohexane 218.02
    cyclooctane 284.88
    cyclopentanol 1554.07
    tetrahydropyran 2008.87
    tert-amyl methyl ether 693.31
    2,5,8-trioxanonane 721.96
    1-hexene 626.17
    2-isopropoxyethanol 566.33
    2,2,2-trifluoroethanol 562.21
    methyl butyrate 846.56

    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