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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

1,8-Diazabicyclo(5,4,0)undecen-7 (DBU) CAS 6674-22-2, is a colourless to yellowish liquid with an unpleasant odour. 1,8-Diazabicyclo(5,4,0)undecen-7 has no melting point and no decomposition between of -100 °C and 30 °C. A glass transition was reported at -90°C and a boiling point of 259.8 °C at 1013 hPa was reported. 1,8-Diazabicyclo(5,4,0)undecen-7 has a density of 1.0190 g/cm3at 20 °C and a calculated vapour pressure of 0.03 hPa at 25 °C. 1,8-Diazabicyclo(5,4,0)undecen-7 has partition coefficient of log Pow < -2.2 25 °C at neural pH and a water solubility of 4917 mg/L at 25 °C. 1,8-Diazabicyclo(5,4,0)undecen-7 has a flash point of 111 °C at 1013.25 hPa with a self-ignition temperature of 266 °C.

The substance has no pyrophoric properties and is non flammable. It is non explosive and possesses no oxidising properties. 1,8-Diazabicyclo(5,4,0)undecen-7 dissociation constant was reported to be 11.6 at 20 °C. 1,8-Diazabicyclo(5,4,0)undecen-7 has a viscosity of 10.1 mm2/s at 20 °C.