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CAS Number: 75-65-0
Sum Formula: C4H10O
Molar Mass: 74.1 g/mol
German Synonyms: tert-Butanol | Trimethylcarbinol | Butylalkohol, tert. | 2-Methylpropanol-2 | 2-Methyl-2-propanol
English Synonyms: tert-Butanol | Trimethylcarbinol | 2-Methylpropanol-2 | 2-Methyl-2-propanol
EC Index Number: 603-005-00-1
EC Number: 200-889-7
Temperature Class: T1
Explosion Group: IIA (estimated)
Structural Formula 2-Methyl-2-propanol

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. 2: flammable liquids, category 2
  • Acute Tox. 4: acute toxicity by inhalation, category 4
GHS Pictogram:
pictogram flammable
pictogram harmful





GHS Signal Word: Danger
GHS Hazard Statement:
  • H225: Highly flammable liquid and vapour.
  • H332: Harmful if inhaled.

Boiling point
1 1941 Berger, H. 1013.25 hPa 83 °C UTI: 15-660-5746/0-39
UTI: 15-660-5746/0-39;
Line no Boiling temperature Pressure
  • defined value
  • at atmospheric pressure
  • saturated
  • property of pure substance
  • saturated
1 83 °C 1013.25 hPa
Bibliographic data
Title Brennbare Gase, Flüssigkeiten und feste Stoffe
Author Berger, H.
Year 1941
Publisher Edmund Stein u. Co.
Publisher City Potsdam
Language GERM
2 1950 1013.25 hPa 83 °C UTI: 1-660-5734/0-39
UTI: 1-660-5734/0-39;
Line no Boiling temperature Pressure
  • defined value
  • at atmospheric pressure
  • saturated
  • property of pure substance
  • saturated
1 83 °C 1013.25 hPa
Bibliographic data
Title Loss Prevention Bulletin No. 36.10: Properties of Flammable Liquids, Gases and Solids
Year 1950
Journal Title The Factory Mutual Engineering Division;Boston, Ma
Publisher The Factory Mutual Engineering Division
Publisher City Boston
Language ENGL
3 1950 PTB 1013.25 hPa 83 °C UTI: 8-660-5741/0-39
UTI: 8-660-5741/0-39;
Line no Boiling temperature Pressure
  • defined value
  • at atmospheric pressure
  • saturated
  • property of pure substance
  • saturated
1 83 °C 1013.25 hPa
Bibliographic data
Author PTB
Year 1950
Title Tabelle des Labors III-B
Database PTB
Publisher PTB, Labor III-B; Braunschweig
Language GERM
4 1963 Nabert, K.; Schön, G. 1013.25 hPa 83 °C UTI: 1000-660-5774/0-39
UTI: 1000-660-5774/0-39;
Line no Boiling temperature Pressure
  • defined value
  • at atmospheric pressure
  • property of pure substance
1 83 °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 1941 Berger, H. 1013.25 hPa 20 °C 0.782 g/cm3 UTI: 15-660-5747/0-39
UTI: 15-660-5747/0-39;
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 0.782 g/cm3 20 °C 1013.25 hPa
Bibliographic data
Title Brennbare Gase, Flüssigkeiten und feste Stoffe
Author Berger, H.
Year 1941
Publisher Edmund Stein u. Co.
Publisher City Potsdam
Language GERM
2 1950 1013.25 hPa 20 °C 0.786 g/cm3 UTI: 1-660-5735/0-39
UTI: 1-660-5735/0-39;
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 0.786 g/cm3 20 °C 1013.25 hPa
Bibliographic data
Title Loss Prevention Bulletin No. 36.10: Properties of Flammable Liquids, Gases and Solids
Year 1950
Journal Title The Factory Mutual Engineering Division;Boston, Ma
Publisher The Factory Mutual Engineering Division
Publisher City Boston
Language ENGL
3 1950 PTB 1013.25 hPa 20 °C 0.782 g/cm3 UTI: 8-660-5742/0-39
UTI: 8-660-5742/0-39;
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 0.782 g/cm3 20 °C 1013.25 hPa
Bibliographic data
Author PTB
Year 1950
Title Tabelle des Labors III-B
Database PTB
Publisher PTB, Labor III-B; Braunschweig
Language GERM
4 1963 Nabert, K.; Schön, G. 1013.25 hPa 20 °C 0.79 g/cm3 UTI: 1000-660-5775/0-39
UTI: 1000-660-5775/0-39;
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 0.79 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
Diffusion coefficient
1 1963 Nabert, K.; Schön, G. 20 °C 0.1 cm2/s UTI: 1000-660-5778/0-39
UTI: 1000-660-5778/0-39;
Line no Diffusion coefficient Temperature
  • defined value
  • at room temperature
  • property of pure substance
  • recommended value
  • at room temperature
  • property of pure substance
1 0.1 cm2/s 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
Melting point
1 1941 Berger, H. 25 °C UTI: 15-660-5745/0-39
UTI: 15-660-5745/0-39;
Line no Melting temperature
  • defined value
  • at atmospheric pressure
  • property of pure substance
1 25 °C
Bibliographic data
Title Brennbare Gase, Flüssigkeiten und feste Stoffe
Author Berger, H.
Year 1941
Publisher Edmund Stein u. Co.
Publisher City Potsdam
Language GERM
2 1950 25 °C UTI: 1-660-5733/0-39
UTI: 1-660-5733/0-39;
Line no Melting temperature
  • defined value
  • at atmospheric pressure
  • property of pure substance
1 25 °C
Bibliographic data
Title Loss Prevention Bulletin No. 36.10: Properties of Flammable Liquids, Gases and Solids
Year 1950
Journal Title The Factory Mutual Engineering Division;Boston, Ma
Publisher The Factory Mutual Engineering Division
Publisher City Boston
Language ENGL
3 1963 Nabert, K.; Schön, G. 1013.25 hPa 26 °C UTI: 1000-660-5779/0-39
UTI: 1000-660-5779/0-39;
Line no Melting temperature Pressure
  • defined value
  • at atmospheric pressure
  • saturated
  • property of pure substance
  • recommended value
  • at atmospheric pressure
  • saturated
1 26 °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
Relative gas density
1 1941 Berger, H. 2.55 UTI: 15-660-5748/0-39
UTI: 15-660-5748/0-39;
Line no Relative gas density
  • defined value
  • property of pure substance
1 2.55
Bibliographic data
Title Brennbare Gase, Flüssigkeiten und feste Stoffe
Author Berger, H.
Year 1941
Publisher Edmund Stein u. Co.
Publisher City Potsdam
Language GERM
2 1950 2.55 UTI: 1-660-5736/0-39
UTI: 1-660-5736/0-39;
Line no Relative gas density
  • defined value
  • property of pure substance
1 2.55
Bibliographic data
Title Loss Prevention Bulletin No. 36.10: Properties of Flammable Liquids, Gases and Solids
Year 1950
Journal Title The Factory Mutual Engineering Division;Boston, Ma
Publisher The Factory Mutual Engineering Division
Publisher City Boston
Language ENGL
3 1950 PTB 2.55 UTI: 8-660-5743/0-39
UTI: 8-660-5743/0-39;
Line no Relative gas density
  • defined value
  • property of pure substance
1 2.55
Bibliographic data
Author PTB
Year 1950
Title Tabelle des Labors III-B
Database PTB
Publisher PTB, Labor III-B; Braunschweig
Language GERM
4 1963 Nabert, K.; Schön, G. 2.55 UTI: 1000-660-5776/0-39
UTI: 1000-660-5776/0-39;
Line no Relative gas density
  • defined value
  • property of pure substance
1 2.55
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) UTI: 228-660-5771/0-39
UTI: 228-660-5771/0-39;
Line no Solubility in water
  • defined value
  • property of pure substance
1 miscible with water [1]
[1] miscible with water
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 1963 Nabert, K.; Schön, G. 470 °C UTI: 1000-660-5777/0-39
UTI: 1000-660-5777/0-39;
Line no Autoignition Temperature
  • recommended value
  • according to german standard
  • property of pure substance
1 470 °C [A]
[A] DIN 51794: Testing of mineral oil hydrocarbons - Determination of ignition temperature; measurements are technically identical to those of ISO/IEC 80079-20-1 but results are treated differently.
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 1948 Scott, G.S; Jones, G.W.; Scott, F.E. 460 °C ... 478 °C UTI: 26-660-5750/0-39
UTI: 26-660-5750/0-39;
Line no Autoignition Temperature
  • methode not internationally standardized
  • property of pure substance
1 460 °C [1]
2 478 °C
[1] in oxygen
Bibliographic data
Title Determination of Ignition Temperatures of Combustible Liquids and Gases
Author Scott, G.S; Jones, G.W.; Scott, F.E.
Year 1948
Journal Title Anal. Chem.
Volume 20
Issue 3
Pages 238-241
Publisher Anal. Chem.
Language ENGL
3 1950 483 °C UTI: 1-660-5738/0-39
UTI: 1-660-5738/0-39;
Line no Autoignition Temperature
  • methode not internationally standardized
  • property of pure substance
1 483 °C
Bibliographic data
Title Loss Prevention Bulletin No. 36.10: Properties of Flammable Liquids, Gases and Solids
Year 1950
Journal Title The Factory Mutual Engineering Division;Boston, Ma
Publisher The Factory Mutual Engineering Division
Publisher City Boston
Language ENGL
4 1975 Yagyu, S. 460 °C UTI: 179-660-5755/0-39
UTI: 179-660-5755/0-39;
Line no Autoignition Temperature
  • experimental
  • international standard method
  • property of pure substance
1 460 °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
Title Data for Ignition Temperature(1st and 2nd)
Author Yagyu, S.
Year 1975
Publisher RIIS
Language JAPN
Flash point
1 1963 Nabert, K.; Schön, G. 11 °C UTI: 1000-660-5772/0-39
UTI: 1000-660-5772/0-39;
Line no Flash point
  • recommended value
  • experimental
  • closed cup
  • property of pure substance
1 11 °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
2 1941 Berger, H. 11 °C UTI: 15-660-5749/0-39
UTI: 15-660-5749/0-39;
Line no Flash point
  • closed cup
  • property of pure substance
1 11 °C
Bibliographic data
Title Brennbare Gase, Flüssigkeiten und feste Stoffe
Author Berger, H.
Year 1941
Publisher Edmund Stein u. Co.
Publisher City Potsdam
Language GERM
3 1950 11 °C UTI: 1-660-5737/0-39
UTI: 1-660-5737/0-39;
Line no Flash point
  • closed cup
  • property of pure substance
1 11 °C
Bibliographic data
Title Loss Prevention Bulletin No. 36.10: Properties of Flammable Liquids, Gases and Solids
Year 1950
Journal Title The Factory Mutual Engineering Division;Boston, Ma
Publisher The Factory Mutual Engineering Division
Publisher City Boston
Language ENGL
4 1950 PTB 11 °C UTI: 8-660-5744/0-39
UTI: 8-660-5744/0-39;
Line no Flash point
  • closed cup
  • property of pure substance
1 11 °C
Bibliographic data
Author PTB
Year 1950
Title Tabelle des Labors III-B
Database PTB
Publisher PTB, Labor III-B; Braunschweig
Language GERM
5 2009 Physikalisch-Technische Bundesanstalt (PTB) -5.5 °C UTI: 4029-660-5787/0-39
UTI: 4029-660-5787/0-39;
Line no Flash point
  • experimental
  • closed cup
  • property of pure substance
1 -5.5 °C
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 2009
Title Sicherheitstechnische Kenngrößen: Messwerte 2009 des PTB-Laboratoriums 3.41
Database PTB
Publisher PTB-Lab. 3.41
Language GERM
Explosion limits
Lower explosion limit
1 2006 Physikalisch-Technische Bundesanstalt (PTB) 1.4 Vol% UTI: 4026-660-5784/0-39
UTI: 4026-660-5784/0-39;
Line no Lower explosion limit
  • recommended value
  • experimental
  • property of pure substance
1 1.4 Vol% [A]
2 43 g/m3 [A] ⚠
[A] DIN EN 1839-Tube: Determination of the explosion limits and the limiting oxygen concentration (LOC) for flammable gases and vapours; tube method
⚠ The reference for the specification in g/m3 is the molar volume at 20 °C
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 2006
Title Sicherheitstechnische Kenngrößen: Messwerte 2006 des PTB-Laboratoriums 3.41
Database PTB
Publisher PTB-Lab. 3.41
Language GERM
2 1950 2.4 Vol% UTI: 1-660-5739/0-39
UTI: 1-660-5739/0-39;
Line no Lower explosion limit
  • property of pure substance
1 2.4 Vol%
Bibliographic data
Title Loss Prevention Bulletin No. 36.10: Properties of Flammable Liquids, Gases and Solids
Year 1950
Journal Title The Factory Mutual Engineering Division;Boston, Ma
Publisher The Factory Mutual Engineering Division
Publisher City Boston
Language ENGL
3 1963 Nabert, K.; Schön, G. 2.3 Vol% ± 10 % UTI: 1000-660-5780/0-39
UTI: 1000-660-5780/0-39;
Line no Lower explosion limit
  • do not use
  • property of pure substance
1 2.3 Vol% ± 10 %
2 70 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
4 Lower Explosion Limit as a function of temperature (DIN EN 1839-T) 2006 Physikalisch-Technische Bundesanstalt (PTB) 100 °C ... 180 °C 1.1 Vol% ... 1.3 Vol% UTI: 4026-660-5783/0-39
Lower Explosion Limit as a function of temperature (DIN EN 1839-T)
UTI: 4026-660-5783/0-39;
Line no Temperature Lower explosion limit
  • experimental
  • property of pure substance
  • recommended value
  • experimental
  • at atmospheric pressure
  • property of pure substance
1 100 °C 1.3 Vol%
2 150 °C 1.2 Vol%
3 180 °C 1.1 Vol%
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 2006
Title Sicherheitstechnische Kenngrößen: Messwerte 2006 des PTB-Laboratoriums 3.41
Database PTB
Publisher PTB-Lab. 3.41
Language GERM
Upper explosion limit
1 Upper Explosion Limit as a function of pressure and temperature (9-l-autoclave) 2013 Physikalisch-Technische Bundesanstalt (PTB) 10 bar 150 °C ... 250 °C 17.1 Vol% ... 23.1 Vol% UTI: 4033-660-5788/0-39
Upper Explosion Limit as a function of pressure and temperature (9-l-autoclave)
UTI: 4033-660-5788/0-39;
Line no Temperature Pressure Upper explosion limit
  • property of pure substance
  • recommended value
  • experimental
  • property of pure substance
1 150 °C 10 bar 17.1 Vol%
2 200 °C 10 bar 20.9 Vol%
3 250 °C 10 bar 23.1 Vol%
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 2013
Title Sicherheitstechnische Kenngrößen: Messwerte 2013 des PTB-Laboratoriums 3.71
Database PTB
Publisher PTB-Lab. 3.71
Language GERM
2 1950 8 Vol% UTI: 1-660-5740/0-39
UTI: 1-660-5740/0-39;
Line no Upper explosion limit
  • property of pure substance
1 8 Vol%
Bibliographic data
Title Loss Prevention Bulletin No. 36.10: Properties of Flammable Liquids, Gases and Solids
Year 1950
Journal Title The Factory Mutual Engineering Division;Boston, Ma
Publisher The Factory Mutual Engineering Division
Publisher City Boston
Language ENGL
3 1963 Nabert, K.; Schön, G. 8 Vol% ± 5 % UTI: 1000-660-5781/0-39
UTI: 1000-660-5781/0-39;
Line no Upper explosion limit
  • property of pure substance
1 8 Vol% ± 5 %
2 250 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
4 Upper Explosion Limit as a function of temperature (DIN EN 1839-T) 2006 Physikalisch-Technische Bundesanstalt (PTB) 120 °C ... 180 °C 10.9 Vol% ... 11.3 Vol% UTI: 4026-660-5785/0-39
Upper Explosion Limit as a function of temperature (DIN EN 1839-T)
UTI: 4026-660-5785/0-39;
Line no Temperature Upper explosion limit
  • experimental
  • property of pure substance
  • recommended value
  • experimental
  • at atmospheric pressure
  • property of pure substance
1 120 °C 10.9 Vol%
2 150 °C 11.2 Vol%
3 180 °C 11.3 Vol%
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 2006
Title Sicherheitstechnische Kenngrößen: Messwerte 2006 des PTB-Laboratoriums 3.41
Database PTB
Publisher PTB-Lab. 3.41
Language GERM
Lower explosion point
1 1986 Yagyu, S. 9 °C UTI: 200-660-5756/0-39
UTI: 200-660-5756/0-39;
Line no Lower explosion point
  • recommended value
  • experimental
  • property of pure substance
1 9 °C
Bibliographic data
Title Diagrams Related to Flashing Temperatures and Flammability Limits
Author Yagyu, S.
Year 1986
Journal Title Safety Document of the Research Institute of Indus
Volume 25
Publisher RIIS
Language JAPN
Maximum experimental safe gap
1 2009 Physikalisch-Technische Bundesanstalt (PTB) 1013 mbar 70 °C 1.01 mm UTI: 4029-660-5786/0-39
UTI: 4029-660-5786/0-39;
Line no Temperature Pressure Maximum experimental safe gap
  • experimental
  • property of pure substance
  • experimental
  • recommended value
  • experimental
  • property of pure substance
1 70 °C 1013 mbar 1.01 mm
Bibliographic data
Author Physikalisch-Technische Bundesanstalt (PTB)
Year 2009
Title Sicherheitstechnische Kenngrößen: Messwerte 2009 des PTB-Laboratoriums 3.41
Database PTB
Publisher PTB-Lab. 3.41
Language GERM
Stoichiometric fraction of combustible substance in mixture with air
1 2005 Physikalisch-Technische Bundesanstalt (PTB) 3.4 Mol% UTI: 220-660-5770/0-39
UTI: 220-660-5770/0-39;
Line no Stoichiometric fraction of combustible substance in mixture with air
  • recommended value
  • property of pure substance
1 3.4 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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