Tetraethyl orthosilicate
Tetraethyl orthosilicate, formally named tetraethoxysilane (TEOS), ethyl silicate is the organic chemical compound with the formula Si(OC2H5)4.[5] TEOS has historically been used as an additive to alcohol based rocket fuels to decrease the heat flux to the chamber wall of regeneratively cooled engines by over 50%.[6] TEOS is used in steel casting industry as an inorganic binder and stiffener for making silica-based ceramic molding forms (see also sodium silicate).[9][better source needed] TEOS easily converts to silicon dioxide upon the addition of water: An idealized equation is shown, in reality the silica produced is hydrated.High exposure to TEOS can lead to pulmonary edema, but hazards can be reduced by atmospheric humidity and vapor pressure conditions.
Tetramethyl orthosilicateIUPAC nameCAS NumberChemSpiderECHA InfoCardPubChemCompTox DashboardSMILESChemical formulaMolar massDensityMelting pointBoiling pointSolubility in waterVapor pressureOccupational safety and healthFlash pointstandard stateformally namedchemical compoundformulaorthosilicic acidalkoxidesilicon tetrachlorideethyl groupethanolsiliconesilicon dioxidezeolitesaerogelsteel castingceramic moldingsodium silicatepassivationteeth crownssiloxanessol-gelcatalystsStöber processmonodispersemesoporous silicadiethyl etherpulmonary edemaNational Institute for Occupational Safety and HealthBibcodeJohn Wiley & SonsWorld Scientific Publishing