1,8-Diazabicyclo(5.4.0)undec-7-ene

1,8-Diazabicyclo[5.4.0]undec-7-ene
Names
	Preferred IUPAC name 2,3,4,6,7,8,9,10-Octahydropyrimido[1,2-a]azepine
	Other names DBU, Diazabicycloundecene
Identifiers
CAS Number	6674-22-2 ;
3D model (JSmol)	Interactive image;
ChemSpider	73246 ;
ECHA InfoCard	100.027.013
EC Number	229-713-7;
PubChem CID	81184;
UNII	H1ILJ6IBUX;
CompTox Dashboard (EPA)	DTXSID2049424 ;
	InChI InChI=1S/C9H16N2/c1-2-5-9-10-6-4-8-11(9)7-3-1/h1-8H2 Key: GQHTUMJGOHRCHB-UHFFFAOYSA-N ; InChI=1/C9H16N2/c1-2-5-9-10-6-4-8-11(9)7-3-1/h1-8H2 Key: GQHTUMJGOHRCHB-UHFFFAOYAM;
	SMILES N\2=C1\N(CCCCC1)CCC/2;
Properties
Chemical formula	C9H16N2
Molar mass	152.241 g·mol−1
Appearance	Colorless liquid
Density	1.018 g/mL liquid
Melting point	−70 °C (−94 °F; 203 K)
Boiling point	261 °C (502 °F; 534 K) (1 atm),; 80 to 83 °C (0.6 mmHg)
Solubility in water	ethers, alcohols
Acidity (pKa)	13.5±1.5 (pKa of conjugate acid in water); 24.34 (pKa of conjugate acid in acetonitrile)
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H302, H312, H314, H412
Precautionary statements	P260, P264, P270, P273, P280, P301+P310, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P321, P322, P330, P363, P405, P501
Flash point	119.9 °C (247.8 °F; 393.0 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

1,8-Diazabicyclo[5.4.0]undec-7-ene, or more commonly DBU, is a chemical compound and belongs to the class of amidine compounds. It is used in organic synthesis as a catalyst, a complexing ligand, and a non-nucleophilic base.