Description

Ethyl Silicate (Tetraethyl Orthosilicate, TEOS) is a high-purity silicon compound with the molecular formula C₈H₂₀O₄Si, widely used in research and industrial applications. This colorless liquid serves as a critical precursor in sol-gel processes, ceramic coatings, and nanotechnology due to its ability to hydrolyze and form silica networks. With a CAS number 78-10-4, it is characterized by its high reactivity with water, excellent solvency, and compatibility with organic matrices. Ideal for synthesizing silica-based materials, thin-film deposition, and surface modification, our Ethyl Silicate is rigorously tested for consistency, low impurities, and optimal performance in demanding environments. Packaged under inert conditions to ensure stability and longevity.

Properties

• CAS Number: 78-10-4
• Complexity: 91.2
• IUPAC Name: tetraethyl silicate
• InChI: InChI=1S/C8H20O4Si/c1-5-9-13(10-6-2,11-7-3)12-8-4/h5-8H2,1-4H3
• InChI Key: BOTDANWDWHJENH-UHFFFAOYSA-N
• Exact Mass: 208.11308565
• Molecular Formula: C8H20O4Si
• Molecular Weight: 208.33
• SMILES: CCO[Si](OCC)(OCC)OCC
• Topological: 36.9
• Monoisotopic Mass: 208.11308565
• Physical Description: Ethyl silicate appears as a clear colorless liquid with a faint odor. Flash point 125 °F. Less dense than water. Vapors are heavier than air.
• Color/Form: Colorless liquid
• Odor: SHARP, ESTER-LIKE ODOR
• Boiling Point: 336 °F at 760 mmHg
• Melting Point: -121.9 °F
• Flash Point: 99 °F
• Solubility: Reacts with water
• Density: 0.933 at 68 °F – Less dense than water; will float
• Vapor Density: 7.22
• Vapor Pressure: 1 mmHg
• Viscosity: 0.6 cP at 25 °C
• Surface Tension: 22.8 DYNES/CM = 0.0228 N/M AT 20 °C
• Ionization Potential: 9.77 eV
• Odor Threshold: Odor Threshold Low: 3.6 [ppm]
• Refractive Index: Index of refraction: 1.3818 atT 25 °C/D
• Synonyms: Tetraethyl orthosilicate, Tetraethoxysilane, Tetraethyl silicate, 78-10-4, 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], Orthosilicic acid, tetraethyl ester, EINECS 201-083-8, UN1292, BRN 1422225, CCRIS 8482, DTXSID6026450, Tetraethoxysilicon(IV), AI3-15098, Silicic acid, (H4SiO4), tetraethyl ester, NSC-4790, 42064KRE49, ETHYL SILICATE [MI], DTXCID906450, BOTDANWDWHJENH-UHFFFAOYSA-, EC 201-083-8, TETRAETHYL SILICATE [HSDB], Etylu krzemian (Polish), Tetraethylsilikat (Czech), Silicate d’ethyle (French), Silicate tetraethylique (French), Silibone, TetraethylOsilicate, Silane, tetraethoxy, SILIBOND, CONSERVARE OH, STEINFESTIGER OH, ETHYL SILICATE 28, ETHYL SILICATE 40, Silicic acid tetraethyl ester, ES 100 (SILICATE), Ethyl silicate (ACGIH:OSHA), KBE 04, TES 28, SI 42, ETHYL SILICATE ((ETO)4SI), TSL 8124, SILICON ETHOXIDE (SI(OET)4), LS 2430, TETRAETHYL ORTHOSILICATE [INCI], SILICON TETRAETHOXIDE (SI(OET)4), 201-083-8, inchi=1/c8h20o4si/c1-5-9-13(10-6-2,11-7-3)12-8-4/h5-8h2,1-4h3, TEOS, TEOS (VAN), MFCD00009062, Orthosilicic acid tetraethyl ester, TEOS [VAN], UNII-42064KRE49, tetraethoxy silane, R-(E,E)]-7-[4-(Dimethylamino)phenyl]-N-hydroxy-4,6-dimethyl-7-oxo-2,4-heptadienamide;, tetra(ethoxy)silane, ES 28 ester, tetrakis(ethoxy)silane, tetraethylortho silicate, Si(OEt)4, Silicic acid,ethyl ester, tetraethyl-ortho-silicate, Tetraethyl orthosilicateTEOS, SCHEMBL17680, (C2H5O)4Si, Si(OC2H5)4, CHEMBL3187981, SCHEMBL11752468, SCHEMBL11752473, NSC4790, DTXSID301304393, STR05461, WLN: 2O-SI-O2&O2&O2, Tox21_200426, AKOS000269012, SILICIC ACID, TETRA-ETHYL ESTER, UN 1292, CAS-78-10-4, s15425, NCGC00248607-01, NCGC00257980-01, ETHYL, 1-[(TRIETHOXYSILYL)OXY]-, 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, 76063-52-0

Application

Ethyl Silicate is extensively used as a crosslinking agent in silicone polymers and as a binder in refractory materials. It plays a key role in the production of precision castings and coatings due to its ability to form durable silica matrices upon hydrolysis. Researchers also employ it in the synthesis of mesoporous silica nanoparticles for drug delivery and catalysis.

Safety and Hazards

GHS Hazard Statements

• H226: Flammable liquid and vapor [Warning Flammable liquids]
• H315: Causes skin irritation [Warning Skin corrosion/irritation]
• H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]
• H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
• H336: May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects]
• H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]
• H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
• H373: May causes damage to organs through prolonged or repeated exposure [Warning Specific target organ toxicity, repeated exposure]

Precautionary Statements

• P210, P233, P240, P241, P242, P243, P260, P261, P264, P264+P265, P270, P271, P280, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P308+P316, P319, P321, P332+P317, P337+P317, P362+P364, P370+P378, P403+P233, P403+P235, P405, and P501

Hazard Classes and Categories

• Flammable liquids – Category 3
• Skin corrosion/irritation – Category 2
• Serious eye damage/eye irritation – Category 2B
• Specific target organ toxicity – Single exposure – Category 1 , Category 3
• Specific target organ toxicity – Repeated exposure – Category 2

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.