Diacetyl monoximeDiacetyl monoxime is a chemical compound described by the formula CH3CCCH3. This colourless solid is the monooxime derivative of the diketone butane-2,3-dione. Its biological effects include inhibiting certain ATPases.PreparationThe compound can be prepared from butanone by reaction with ethyl nitrite. It is an intermediate in the preparation of dimethylglyoxime:UsesDiacetyl monoxime can be used with thiosemicarbazide to selectively detect small amounts of urea in the presence of other nitrogen-containing compounds.