Tetraethyl orthosilicate

Synonym: TEOS, Orthosilicic acid tetraethyl ester, Silicon tetraethoxide, Tetraethoxysilane, Tetraethoxysilicon(IV), Tetraethyl silicate
CAS Number 78-10-4 | MDL Number MFCD00009062 | EC Number 201-083-8

Tetraethyl orthosilicate Chemical Structure

Product CodeSI8104
CAS Number78-10-4
Assay (purity)98.0%+
Purity methodby GC
Molecular weight208.33
Formliquid
Appearancecolorless liquid
Sensitivitymoisture
Melting point-82.5C
Boiling point168C
Molecular formulaC8H20O4Si
Linear formulaSi(OC2H5)4
Download Specification SI8104
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Safety information

Signal wordWARNING
Pictograms
Hazard statementsH226, H319, H332, H335
Precautionary statementsP210, P233, P240, P241, P242, P243, P261, P264, P271, P280, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P312, P337+P313, P370+P378, P403+P233, P403+P235, P405, P501
UN1292
Transport descriptionTETRAETHYL SILICATE
Hazardous class3
Packing groupIII
In TSCA registryYes
Flash point45C

Certificates of analysis (CoA)

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External identifiers for TEOS

Pubchem CID6517
SMILES[Si](OCC)(OCC)(OCC)OCC
IUPAC Nametetraethylsilicate
InchI IdentifierInChI=1S/C8H20O4Si/c1-5-9-13(10-6-2,11-7-3)12-8-4/h5-8H2,1-4H3
InchI KeyBOTDANWDWHJENH-UHFFFAOYSA-N

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