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CAS Number: 1120-21-4
Sum Formula: C11H24
Molar Mass: 156.3 g/mol
German Synonyms: n-Undecan | Undecan
English Synonyms: Hendecane | Undecane
EC Number: 214-300-6
Temperature Class: T4
Explosion Group: IIA (estimated)
Structural Formula Undecane

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 )

Antoine parameters
1 DECHEMA 7.8832 Torr UTI: 1100-1620-24465/0-39
UTI: 1100-1620-24465/0-39;
Line no Upper temperature limit of Antoine equation Lower temperature limit of Antoine equation Antoine constant C Antoine constant B Antoine constant A
  • recommended value
  • saturated
  • property of pure substance
  • recommended value
  • saturated
  • property of pure substance
  • recommended value
  • by regression
  • saturated
  • property of pure substance
  • recommended value
  • by regression
  • saturated
  • property of pure substance
  • defined value
  • by regression
  • saturated
  • property of pure substance
1 < 196 °C > 33 °C 254.149 °C 2250.79 °C 7.8832 Torr
Bibliographic data
Author DECHEMA
Title Antoinekonstanten
Database PTB
Publisher Detherm
Boiling point
1 1963 Nabert, K.; Schön, G. 1013.25 hPa 196 °C UTI: 1000-1620-24458/0-39
UTI: 1000-1620-24458/0-39;
Line no Boiling temperature Pressure
  • defined value
  • at atmospheric pressure
  • property of pure substance
1 196 °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
Density
1 1963 Nabert, K.; Schön, G. 1013.25 hPa 20 °C 0.74 g/cm3 UTI: 1000-1620-24459/0-39
UTI: 1000-1620-24459/0-39;
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 0.74 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
Melting point
1 1963 Nabert, K.; Schön, G. -26 °C UTI: 1000-1620-24457/0-39
UTI: 1000-1620-24457/0-39;
Line no Melting temperature
  • defined value
  • at atmospheric pressure
  • property of pure substance
1 -26 °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
Relative gas density
1 1963 Nabert, K.; Schön, G. 5.39 UTI: 1000-1620-24460/0-39
UTI: 1000-1620-24460/0-39;
Line no Relative gas density
  • defined value
  • property of pure substance
1 5.39
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
Solubility in water
1 2009 Physikalisch-Technische Bundesanstalt (PTB) 25 °C 0.0000 g/l UTI: 228-1620-24455/0-39
UTI: 228-1620-24455/0-39;
Line no Solubility in water Temperature
  • defined value
  • property of pure substance
  • property of pure substance
1 0.0000 g/l 25 °C
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 1997 Physikalisch-Technische Bundesanstalt (PTB) 195 °C UTI: 4007-1620-24466/0-39
UTI: 4007-1620-24466/0-39;
Line no Autoignition Temperature
  • recommended value
  • experimental
  • international standard method
  • property of pure substance
1 195 °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 1997
Title Sicherheitstechnische Kenngrößen: Messwerte 1997 des PTB-Laboratoriums 3.31
Database PTB
Publisher Datenbank PTB-Lab. 3.31
Language GERM
2 1963 Nabert, K.; Schön, G. 240 °C UTI: 1000-1620-24462/0-39
UTI: 1000-1620-24462/0-39;
Line no Autoignition Temperature
  • do not use
  • international standard method
  • property of pure substance
1 240 °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 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
Flash point
1 1963 Nabert, K.; Schön, G. 61 °C UTI: 1000-1620-24461/0-39
UTI: 1000-1620-24461/0-39;
Line no Flash point
  • recommended value
  • closed cup
  • property of pure substance
1 61 °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
Explosion limits
Lower explosion limit
1 Lower Explosion Limit as a function of pressure and temperature 1991 Physikalisch-Technische Bundesanstalt (PTB) 50 mbar ... 1013 mbar 100 °C ... 150 °C 0.4 Vol% ... 1 Vol% UTI: 4801-1620-24467/0-39
Lower Explosion Limit as a function of pressure and temperature
UTI: 4801-1620-24467/0-39;
Line no Temperature Pressure Lower explosion limit
  • experimental
  • property of pure substance
  • experimental
  • recommended value
  • experimental
  • property of pure substance
1 100 °C 50 mbar 1 Vol%
2 100 °C 100 mbar 0.7 Vol%
3 100 °C 150 mbar 0.6 Vol%
4 100 °C 200 mbar 0.6 Vol%
5 100 °C 300 mbar 0.5 Vol%
6 100 °C 400 mbar 0.5 Vol%
7 100 °C 600 mbar 0.5 Vol%
8 100 °C 800 mbar 0.5 Vol%
9 100 °C 1013 mbar 0.5 Vol%
10 150 °C 100 mbar 0.8 Vol%
11 150 °C 200 mbar 0.5 Vol%
12 150 °C 400 mbar 0.4 Vol%
13 150 °C 600 mbar 0.4 Vol%
14 150 °C 1013 mbar 0.4 Vol%
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. 0.6 Vol% ± 10 % UTI: 1000-1620-24464/0-39
UTI: 1000-1620-24464/0-39;
Line no Lower explosion limit
  • recommended value
  • property of pure substance
1 0.6 Vol% ± 10 %
2 42 g/m3 ± 10 % ⚠
⚠ The reference for the specification in g/m3 is the molar volume at 20 °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
Upper explosion limit
1 1963 Nabert, K.; Schön, G. 6.5 Vol% ± 5 % UTI: 1000-1620-24463/0-39
UTI: 1000-1620-24463/0-39;
Line no Upper explosion limit
  • recommended value
  • property of pure substance
1 6.5 Vol% ± 5 %
2 425 g/m3 ± 5 % ⚠
⚠ The reference for the specification in g/m3 is the molar volume at 20 °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
Maximum experimental safe gap
1 2014 Physikalisch-Technische Bundesanstalt (PTB) 101 kPa 90 °C 0.83 mm UTI: 4034-1620-60147/20240730-39
UTI: 4034-1620-60147/20240730-39;
Line no Pressure Temperature Maximum experimental safe gap
  • Parameter of the measurement
  • Parameter of the measurement
  • recommended value
  • experimental
  • international standard method
1 101 kPa 90 °C 0.83 mm [A]
[A] IEC 60079-20-1: Explosive atmospheres - Part 20-1: Material characteristics for gas and vapour classification - Test methods and data; Replaced by ISO/IEC 80079-20-1 in 2017
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 2014
Title Sicherheitstechnische Kenngrößen: Messwerte 2014 des PTB-Laboratoriums 3.71
Database PTB
Publisher PTB-Lab. 3.71
Language GERM
Stoichiometric fraction of combustible substance in mixture with air
1 2005 Physikalisch-Technische Bundesanstalt (PTB) 1.2 Mol% UTI: 220-1620-24454/0-39
UTI: 220-1620-24454/0-39;
Line no Stoichiometric fraction of combustible substance in mixture with air
  • recommended value
  • property of pure substance
1 1.2 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

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