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CAS Number: 78-10-4
Sum Formula: C8H20O4Si
Molar Mass: 208.3 g/mol
German Synonyms: Kieselsäuretetraethylester | Tetraethoxysilan | Ethylsilikat | Tetraethylorthosilicat
English Synonyms: Tetraethyl orthosilicate | Silicic acid tetraethyl ester
EC Index Number: 014-005-00-0
EC Number: 201-083-8
Temperature Class: T3
Explosion Group: IIB
Structural Formula Silicic acid tetraethyl ester

Disclaimer: The CLP/GHS classification is not regularly updated in Chemsafe. For up-to-date information, please use the ECHA database. ( https://echa.europa.eu/en/information-on-chemicals )

GHS Hazard and Category:
  • Flam. Liq. 3: flammable liquids, category 3
  • Acute Tox. 4: acute toxicity by inhalation, category 4
  • Eye Irrit. 2: eye irritation, category 2
  • STOT SE 3: Specific target organ toxicity following single exposure, category 3, respiratory tract irritation or narcotic effects
GHS Pictogram:
pictogram flammable
pictogram harmful





GHS Signal Word: Warning
GHS Hazard Statement:
  • H226: Flammable liquid and vapour.
  • H332: Harmful if inhaled.
  • H319: Causes serious eye irritation.
  • H335: May cause respiratory irritation.

Antoine parameters
1 1987 Stephenson, R.M.; Malanowski, S. 6.005 kPa UTI: 137-1089-16811/0-39
UTI: 137-1089-16811/0-39;
Line no Upper temperature limit of Antoine equation Lower temperature limit of Antoine equation Antoine constant C Antoine constant B Antoine constant A
  • saturated
  • property of pure substance
  • saturated
  • property of pure substance
  • saturated
  • property of pure substance
  • saturated
  • property of pure substance
  • defined value
  • saturated
  • property of pure substance
1 442 K 275 K 0 K 1770 K 6.005 kPa
Bibliographic data
Author Stephenson, R.M.; Malanowski, S.
Year 1987
Title Handbook of The Thermodynamics of Organic Compounds
Publisher Elsevier; New York, Amsterdam, London
Language ENGL
Boiling point
1 1963 Nabert, K.; Schön, G. 1013.25 hPa 166 °C UTI: 1000-1089-16825/0-39
UTI: 1000-1089-16825/0-39;
Line no Boiling temperature Pressure
  • defined value
  • at atmospheric pressure
  • property of pure substance
1 166 °C 1013.25 hPa
Bibliographic data
Author Nabert, K.; Schön, G.
Year 1963
Title Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (mit 6. Nachtrag)
Publisher Deutscher Eichverlag
Publisher City Braunschweig
Abstract English Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Language GERM
2 1987 Stephenson, R.M.; Malanowski, S. 1013.25 hPa 439.2 K UTI: 137-1089-16810/0-39
UTI: 137-1089-16810/0-39;
Line no Boiling temperature Pressure
  • defined value
  • at atmospheric pressure
  • property of pure substance
1 439.2 K 1013.25 hPa
Bibliographic data
Author Stephenson, R.M.; Malanowski, S.
Year 1987
Title Handbook of The Thermodynamics of Organic Compounds
Publisher Elsevier; New York, Amsterdam, London
Language ENGL
3 1991 Physikalisch-Technische Bundesanstalt (PTB) 1013.25 hPa 166 °C ... 169 °C UTI: 4801-1089-16829/0-39
UTI: 4801-1089-16829/0-39;
Line no Boiling temperature Pressure
  • defined value
  • at atmospheric pressure
  • saturated
  • property of pure substance
  • saturated
1 166 °C ... 169 °C 1013.25 hPa
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 1991
Title Empfohlene Sicherheitstechnische Kenngrößen
Database PTB
Publisher Datenbank PTB-AG 3.41/3.71
Language GERM
4 1994 1013.25 hPa 168 °C UTI: 16-1089-16805/0-39
UTI: 16-1089-16805/0-39;
Line no Boiling temperature Pressure
  • defined value
  • at atmospheric pressure
  • saturated
  • property of pure substance
  • saturated
1 168 °C 1013.25 hPa
Bibliographic data
Year 1994
Title Fire-hazard Properties of certain Flammable Liquids, Gases and Volatile Solids
Publisher National Fire Protection Association
Publisher City Boston
Language ENGL
Density
1 1963 Nabert, K.; Schön, G. 1013.25 hPa 20 °C 0.93 g/cm3 UTI: 1000-1089-16826/0-39
UTI: 1000-1089-16826/0-39;
Line no Density Temperature Pressure
  • defined value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • recommended value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • recommended value
  • at atmospheric pressure and room temperature
1 0.93 g/cm3 20 °C 1013.25 hPa
Bibliographic data
Author Nabert, K.; Schön, G.
Year 1963
Title Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (mit 6. Nachtrag)
Publisher Deutscher Eichverlag
Publisher City Braunschweig
Abstract English Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Language GERM
2 1994 1013.25 hPa 20 °C 0.936 g/cm3 UTI: 16-1089-16806/0-39
UTI: 16-1089-16806/0-39;
Line no Density Temperature Pressure
  • defined value
  • at atmospheric pressure and room temperature
  • property of pure substance
  • at atmospheric pressure and room temperature
  • property of pure substance
  • at atmospheric pressure and room temperature
1 0.936 g/cm3 20 °C 1013.25 hPa
Bibliographic data
Year 1994
Title Fire-hazard Properties of certain Flammable Liquids, Gases and Volatile Solids
Publisher National Fire Protection Association
Publisher City Boston
Language ENGL
Melting point
1 1963 Nabert, K.; Schön, G. 1013.25 hPa -77 °C UTI: 1000-1089-16828/0-39
UTI: 1000-1089-16828/0-39;
Line no Melting temperature Pressure
  • defined value
  • at atmospheric pressure
  • saturated
  • property of pure substance
  • recommended value
  • at atmospheric pressure
  • saturated
1 -77 °C 1013.25 hPa
Bibliographic data
Author Nabert, K.; Schön, G.
Year 1963
Title Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (mit 6. Nachtrag)
Publisher Deutscher Eichverlag
Publisher City Braunschweig
Abstract English Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Language GERM
2 1987 Stephenson, R.M.; Malanowski, S. 199.2 K UTI: 137-1089-16809/0-39
UTI: 137-1089-16809/0-39;
Line no Melting temperature
  • defined value
  • at atmospheric pressure
  • property of pure substance
1 199.2 K
Bibliographic data
Author Stephenson, R.M.; Malanowski, S.
Year 1987
Title Handbook of The Thermodynamics of Organic Compounds
Publisher Elsevier; New York, Amsterdam, London
Language ENGL
Relative gas density
1 1963 Nabert, K.; Schön, G. 7.19 UTI: 1000-1089-16827/0-39
UTI: 1000-1089-16827/0-39;
Line no Relative gas density
  • defined value
  • property of pure substance
1 7.19
Bibliographic data
Author Nabert, K.; Schön, G.
Year 1963
Title Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (mit 6. Nachtrag)
Publisher Deutscher Eichverlag
Publisher City Braunschweig
Abstract English Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Language GERM
2 1994 7.22 UTI: 16-1089-16807/0-39
UTI: 16-1089-16807/0-39;
Line no Relative gas density
  • defined value
  • property of pure substance
1 7.22
Bibliographic data
Year 1994
Title Fire-hazard Properties of certain Flammable Liquids, Gases and Volatile Solids
Publisher National Fire Protection Association
Publisher City Boston
Language ENGL
Solubility in water
1 2009 Physikalisch-Technische Bundesanstalt (PTB) UTI: 228-1089-16822/0-39
UTI: 228-1089-16822/0-39;
Line no Solubility in water
  • defined value
  • property of pure substance
1 substance hydrolyses [1]
[1] substance hydrolyses
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 2009
Title Wasserlöslichkeit
Database PTB
Publisher Datenbank PTB-Lab. 3.43
Language GERM
  • The oxidizing agent is air with an oxygen content of 20.95 % by volume. In the data base it is usually not specified as mixture component. Exceptions are highlighted.
  • Pressure values are absolute, not gauge pressures.
  • Impurities can strongly influence characteristic safety data, particulary if the properties of the impurity considerably deviate from the respective properties of the pure substance.
  • Safety characteristics are only displayed if evaluated data are available.
  • Values can be cited by using the UTI number of the table (Uniform Table Identifier).
  • Color Codes:         recommended value             no recommendation               do not use value

Autoignition Temperature
1 1991 Physikalisch-Technische Bundesanstalt (PTB) 230 °C UTI: 4801-1089-16830/0-39
UTI: 4801-1089-16830/0-39;
Line no Autoignition Temperature
  • recommended value
  • experimental
  • international standard method
  • property of pure substance
1 230 °C [A]
[A] IEC 79-4: Method of Test for Ignition Temperature, Electrical Apparatus for Explosive G; Replaced by IEC-60079-20-1 in 1975
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 1991
Title Empfohlene Sicherheitstechnische Kenngrößen
Database PTB
Publisher Datenbank PTB-AG 3.41/3.71
Language GERM
Flash point
1 1991 Physikalisch-Technische Bundesanstalt (PTB) 37 °C UTI: 4801-1089-16831/0-39
UTI: 4801-1089-16831/0-39;
Line no Flash point
  • recommended value
  • experimental
  • closed cup
  • property of pure substance
1 37 °C
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 1991
Title Empfohlene Sicherheitstechnische Kenngrößen
Database PTB
Publisher Datenbank PTB-AG 3.41/3.71
Language GERM
2 1963 Nabert, K.; Schön, G. 52 °C UTI: 1000-1089-16823/0-39
UTI: 1000-1089-16823/0-39;
Line no Flash point
  • experimental
  • open cup
  • property of pure substance
1 52 °C
Bibliographic data
Author Nabert, K.; Schön, G.
Year 1963
Title Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe (mit 6. Nachtrag)
Publisher Deutscher Eichverlag
Publisher City Braunschweig
Abstract English Safety values of about 1000 flammable gases and vapors: Explosion limits, ignition temperatures, flash points, explosion pressures.
Language GERM
3 1994 52 °C UTI: 16-1089-16808/0-39
UTI: 16-1089-16808/0-39;
Line no Flash point
  • open cup
  • property of pure substance
1 52 °C
Bibliographic data
Year 1994
Title Fire-hazard Properties of certain Flammable Liquids, Gases and Volatile Solids
Publisher National Fire Protection Association
Publisher City Boston
Language ENGL
Lower explosion limit
1 1991 Physikalisch-Technische Bundesanstalt (PTB) 0.8 Vol% UTI: 4801-1089-16833/0-39
UTI: 4801-1089-16833/0-39;
Line no Lower explosion limit
  • recommended value
  • experimental
  • property of pure substance
1 0.8 Vol%
2 67 g/m3 ⚠
⚠ The reference for the specification in g/m3 is the molar volume at 20 °C
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 1991
Title Empfohlene Sicherheitstechnische Kenngrößen
Database PTB
Publisher Datenbank PTB-AG 3.41/3.71
Language GERM
2 Lower Explosion Limit as a function of temperature 1991 Physikalisch-Technische Bundesanstalt (PTB) 50 °C ... 150 °C 57 g/m3 ... 65 g/m3 UTI: 4801-1089-16832/0-39
Lower Explosion Limit as a function of temperature
UTI: 4801-1089-16832/0-39;
Line no Temperature Lower explosion limit
  • experimental
  • property of pure substance
  • recommended value
  • experimental
  • at atmospheric pressure
  • property of pure substance
1 50 °C 65 g/m3 ⚠
2 100 °C 60 g/m3 ⚠
3 150 °C 57 g/m3 ⚠
⚠ The reference for the specification in g/m3 is the molar volume at 20 °C
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 1991
Title Empfohlene Sicherheitstechnische Kenngrößen
Database PTB
Publisher Datenbank PTB-AG 3.41/3.71
Language GERM
Stoichiometric fraction of combustible substance in mixture with air
1 2005 Physikalisch-Technische Bundesanstalt (PTB) 1.7 Mol% UTI: 220-1089-16821/0-39
UTI: 220-1089-16821/0-39;
Line no Stoichiometric fraction of combustible substance in mixture with air
  • recommended value
  • property of pure substance
1 1.7 Mol%
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 2005
Title Berechnete molare stöchiometrische Brenngasanteile in Luft (c_stoech)
Database PTB
Publisher Datenbank PTB-Lab. 3.43
Language GERM

No entry in database