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IUPAC name 1,4-diazabicyclo[2.2.2]octane
Other names triethylenediamine, TEDA
CAS number 280-57-9
Molecular formula C6H12N2
Molar mass 112.17 g/mol
Appearance White crystalline powder
Melting point

156 - 160 °C decomposes

Boiling point

174 °C

Solubility in water Soluble, hygroscopic
Main hazards Harmful
R-phrases R11 R22 R36 R37 R38 R52 R53
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

DABCO or 1,4-diazabicyclo[2.2.2]octane is a chemical compound. It is used as a catalyst, particularly in making polyurethanes, and complexing ligand. DABCO is a useful catalyst in the Baylis-Hillman reaction.

DABCO is also used to adjust pH of the oxygen-sensitive resin to regulate the reaction rate in Flexplay time-limited DVDs. Antioxidants, like DABCO, are used to improve the lifetime of dyes. This makes DABCO useful in dye lasers and in mounting samples for fluorescence microscopy (when used with glycerol and PBS). DABCO can also be used to demethylate quaternary ammonium salts by heating in N,N-dimethylformamide (DMF)[2].


  1. ^ Safety data for 1,4-diazabicyclo(2.2.2)octane. Oxford University.
  2. ^ Ho, T.L Synthesis, 1972, 702.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "DABCO". A list of authors is available in Wikipedia.
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