Tetraethyl orthosilicate, 99%

Name: Tetraethyl orthosilicate, 99%
Brand: Vaqora Chemicals
SKU: VQ-011148

About Tetraethyl orthosilicate, 99%

Tetraethyl orthosilicate (CAS 78-10-4) is an organosilicon compound offered by Vaqora Chemicals, specified at 99% purity. With the molecular formula C8H20O4Si, it has a molar mass of 208.33 g/mol. Systematically, it is named tetraethyl silicate. Alternative names: Orthosilicic acid tetraethyl ester and Silicon tetraethoxide.

The material typically appears as a colourless liquid. Reported physical data include a boiling point of 168 °C and a density of 0.933 g/mL at 20 °C. Store in a cool, well-ventilated place, away from sources of ignition, with the container tightly sealed. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

Typical applications include organic synthesis and paints, coatings and inks. It is used across pharmaceutical manufacturing, academic and industrial research and paints and coatings.

Available in 250 mL, 1 L and 220 kg packs, Tetraethyl orthosilicate is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Organic synthesis
Paints, coatings & inks

Industries

Specifications & identifiers

Chemical identifiers
Product name	Tetraethyl orthosilicate, 99%
Catalogue No.	VQ-011148
CAS Number	78-10-4
IUPAC name	tetraethyl silicate
Molecular formula	C₈H₂₀O₄Si
Molecular weight	208.33 g/mol
Exact mass	208.1131
Purity / assay	99%
HSN code	29209099
InChIKey	BOTDANWDWHJENH-UHFFFAOYSA-N
SMILES	CCO[Si](OCC)(OCC)OCC
PubChem CID	6517

Physical properties
Physical form	Liquid
Appearance	Colourless liquid
Boiling point	168 °C
Density	0.933 g/mL at 20 °C
H-bond donors / acceptors	0 / 4
TPSA	36.9 Å²
UN number	UN 1292
Synonyms	Orthosilicic acid tetraethyl ester, Silicon tetraethoxide, TEOS, Tetraethoxysilane, Tetraethoxysilicon(IV), Dynasil A, Silicon ethoxide, Silikan L, Ethyl orthosilicate, Etylu krzemian, Silane, tetraethoxy-, Tetraethylorthosilicate

Safety & hazard information (GHS)

Flammable

Harmful / irritant

Signal word: Warning

Hazard statements

H226Flammable liquid and vapor
H319Causes serious eye irritation
H332Harmful if inhaled
H335May cause respiratory irritation

Precautionary statements: P210, P233, P240, P241, P242, P243, P261, P264 + P265, P271, P280, P303 + P361 + P353, P304 + P340, P305 + P351 + P338, P317, P319, P337 + P317, P370 + P378, P403 + P233, P403 + P235, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Other grades of CAS 78-10-4

Synthesis

Ethyl silicate

CAS: 78-10-4
Formula: C₈H₂₀O₄Si
MW: 208.33 g/mol

VQ-011120

Synthesis

Tetra ethoxy silane, 98%

CAS: 78-10-4
Formula: C₈H₂₀O₄Si
MW: 208.33 g/mol

VQ-011146

Synthesis

Tetraethyl orthosilicate, 98%

CAS: 78-10-4
Formula: C₈H₂₀O₄Si
MW: 208.33 g/mol

VQ-011147

Puriss

Tetraethyl orthosilicate, 99.999%

CAS: 78-10-4
Formula: C₈H₂₀O₄Si
MW: 208.33 g/mol

VQ-011149

Frequently asked questions

What is the CAS number of Tetraethyl orthosilicate, 99%?

The CAS Registry Number of Tetraethyl orthosilicate, 99% is 78-10-4. It is also known as Orthosilicic acid tetraethyl ester, Silicon tetraethoxide, TEOS.

What is the molecular formula and molecular weight of Tetraethyl orthosilicate, 99%?

Tetraethyl orthosilicate, 99% has the molecular formula C8H20O4Si and a molecular weight of 208.33 g/mol. Its IUPAC name is tetraethyl silicate.

Which grade and pack sizes of Tetraethyl orthosilicate, 99% can I order?

We supply Tetraethyl orthosilicate, 99% in (99%) grade, in 250 mL, 1 L, 220 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Tetraethyl orthosilicate, 99%?

Yes. Every lot of Tetraethyl orthosilicate, 99% is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Tetraethyl orthosilicate, 99% be shipped internationally?

Yes. Tetraethyl orthosilicate, 99% is classified as hazardous (UN 1292), so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.