Potassium azodicarboxylate is a chemical compound with the formula C<sub>2</sub>K<sub>2</sub>N<sub>2</sub>O<sub>4</sub>. This chemical is used as a precursor to diimide. It can be synthesized by the reaction of potassium hydroxide with azodicarbonamide and it reacts with carboxylic acids to form diimide.