C8H20O4Si
208.33 g/mol
Industrial ChemicalWarning
Tetraethyl orthosilicate
CAS78-10-4EC201-083-8
Category
Industrial Chemical
Compound Class
Ester
Primary Use
preservative and binder for stone and coatings
Tetraethyl orthosilicate is a clear colorless liquid with a faint odor that serves as a preservative and binder for stone and coatings. It is used for hardening stone, weatherproofing, and in heat- and chemical-resistant paints.
preservative for stone, brick, concrete, and plasterweather- and acid-proofing processesheat- and chemical-resistant paints and protective coatings
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
ReferenceSame Category
Diallylidene pentaerythritol
CAS78-19-3
crosslinking agent for polymers
ReferenceSame Category
1-ethynylcyclohexanol
CAS78-27-3
Industrial processing aid and intermediate
ReferenceSame Category
Triethyl phosphate
CAS78-40-0
plasticizer and flame retardant
ReferenceSame Category
Tris(2-ethylhexyl)phosphate
CAS78-42-2
flame retardant and plasticizer
Safety Reference
Warning
H226Flammable liquid and vapour
H319Causes serious eye irritation
H332Harmful if inhaled
H335May cause respiratory irritation
H315Causes skin irritation
H336May cause drowsiness or dizziness
H370Causes damage to organs
H372Causes damage to organs through prolonged or repeated exposure
H373May cause damage to organs through prolonged or repeated exposure
H320Causes eye irritation
Regulatory Compliance1
- CN Catalogue of Hazardous ChemicalsCNRegulation
Customs Tariff Classification
The international HS code for Tetraethyl orthosilicate (CAS 78-10-4) is 2920.90.
HS code (international, 6-digit)
2920.90
EU CN code (8-digit)
2920 90 70
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
tetraethyl silicate
InChIKey
BOTDANWDWHJENH-UHFFFAOYSA-N
SMILES
CCO[Si](OCC)(OCC)OCC
Synonyms (39)
- TEOS
- Dynasil A
- ES 28
- ES 28 (ester)
- ETHYL SILICATE
- Ethyl orthosilicate
- Ethyl silicate, ((EtO)4Si)
- Etylu krzemian
- Etylu krzemian [Polish]
- Si(OEt)4
- Silane, tetraethoxy-
- Silicate d'ethyle
- Silicate d'ethyle [French]
- Silicate tetraethylique
- Silicon ethoxide
- Silicon tetraethoxide
- Silikan L
- TEOS (VAN)
- Tetraethoxysilane
- Tetraethoxysilicon
- Tetraethoxysilicon(IV)
- Tetraethyl orthosilicate
- Tetraethyl orthosilicateTEOS
- Tetraethyl silicate
- Tetraethyl-O-silicate
- Tetraethylsilikat
- Tetraethylsilikat [Czech]
- tetrakis(ethoxy)silane
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