tetrazene / tetrazine [ˈtɛtræzi:n]
tetrazene (tetracene) – n. – either of two hypothetical isomeric hydrides of nitrogen HN, NNHNH2 or H2NN. NNH2 known in the form of organic derivatives - a yellow solid compound (H3N2C)NHNHN. N(CN2H2)NHNO made by reaction of amino-guanidine and nitrous acid and used as an explosive in priming compositions for cartridges and in combination with lead azide to reduce the flash point of the latter
tetrazine – n. – one of a group of heterocyclic organic compounds with four nitrogen atoms in a six-atom ring used especially as dyes