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CAS Number: 544-25-2
Sum Formula: C7H8
Molar Mass: 92.1 g/mol
German Synonyms: Cycloheptatrien | 1,3,5-Cycloheptatrien
English Synonyms: Cycloheptatriene | 1,3,5-Cycloheptatriene
EC Number: 208-866-3
Structural Formula 1,3,5-Cycloheptatriene

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
GHS Pictogram:
pictogram flammable





GHS Signal Word: Danger
GHS Hazard Statement:
  • H225: Highly flammable liquid and vapour.

Boiling point
1 1963 Nabert, K.; Schön, G. 1013.25 hPa 117 °C UTI: 1000-1427-22023/0-39
UTI: 1000-1427-22023/0-39;
Line no Boiling temperature Pressure
  • defined value
  • at atmospheric pressure
  • property of pure substance
1 117 °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 0.89 g/cm3 UTI: 1000-1427-22024/0-39
UTI: 1000-1427-22024/0-39;
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 0.89 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. -80 °C UTI: 1000-1427-22022/0-39
UTI: 1000-1427-22022/0-39;
Line no Melting temperature
  • defined value
  • at atmospheric pressure
  • property of pure substance
1 -80 °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. 3.18 UTI: 1000-1427-22025/0-39
UTI: 1000-1427-22025/0-39;
Line no Relative gas density
  • defined value
  • property of pure substance
1 3.18
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 0.62 g/l UTI: 228-1427-22020/0-39
UTI: 228-1427-22020/0-39;
Line no Solubility in water Temperature
  • defined value
  • property of pure substance
  • property of pure substance
1 0.62 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

Flash point
1 1963 Nabert, K.; Schön, G. 5 °C UTI: 1000-1427-22026/0-39
UTI: 1000-1427-22026/0-39;
Line no Flash point
  • recommended value
  • closed cup
  • property of pure substance
1 5 °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
Stoichiometric fraction of combustible substance in mixture with air
1 2005 Physikalisch-Technische Bundesanstalt (PTB) 2.3 Mol% UTI: 220-1427-22019/0-39
UTI: 220-1427-22019/0-39;
Line no Stoichiometric fraction of combustible substance in mixture with air
  • recommended value
  • property of pure substance
1 2.3 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