DABCO, also known as 1,4-diazabicyclo[2.2.2]octane, is a heterocyclic compound that is commonly used as a catalyst in various chemical reactions, particularly in the production of polyurethanes. It is a bicyclic amine with a cage-like structure, making it a relatively stable and effective catalyst. DABCO is also used in organic synthesis and as a nucleophilic catalyst in some pharmaceutical processes.