Dinitroglycoluril (DINGU) is a

high explosive An explosive (or explosive material) is a reactive substance that contains a great amount of potential energy that can produce an explosion if released suddenly, usually accompanied by the production of light, heat, sound, and pressure. An exp ...

chemical compound with the formula C₄ H₄ N₆ O₆. Dinitroglycoluril is of growing interest due to its stability, ability to mix with oxygen positive explosives to form composites, and it is a precursor to tetranitroglycoluril.

Preparation and decomposition

Dinitroglycoluril can be created by

nitrating In organic chemistry, nitration is a general class of chemical processes for the introduction of a nitro group into an organic compound. The term also is applied incorrectly to the different process of forming nitrate esters between alcohols and ...

glycoluril Glycoluril is an organic chemical composed of two cyclic urea groups joined across the same two-carbon chain. It is a white powder that has been used in water treatment, in paints and coatings, and occasionally as a slow-release fertilizer. Produ ...

with concentrated

nitric acid Nitric acid is the inorganic compound with the formula . It is a highly corrosive mineral acid. The compound is colorless, but older samples tend to be yellow cast due to decomposition into oxides of nitrogen. Most commercially available nitri ...

. : The activation energy required to begin decomposition of dinitroglycoluril is 165 kJ/mol. When dinitroglycoluril is heated to 243 °C in an inert atmosphere, the two

nitrate Nitrate is a polyatomic ion A polyatomic ion, also known as a molecular ion, is a covalent bonded set of two or more atoms, or of a metal complex, that can be considered to behave as a single unit and that has a net charge that is not zer ...

groups break off and the two central carbon atoms form a double bond.

Sensitivity

The impact sensitivity of dinitroglycoluril was determined using the Bruceton-staircase procedure, which found a ''h₅₀'' of 88 cm. Friction sensitivity was determined by a Julius-Peters apparatus, which found a sensitivity of 25 kg.

References

{{Reflist Explosive chemicals Nitrogen heterocycles