I once worked at a chemical plant that made ammonium nitrate and di-ammonium phosphate. There was the ammonia plant where the natural gas was pumped in. There was a phosphuric acid plant. And there was a urea plant. I assume there were nitrates being brought in from somewhere.
Anyway, we smoked all over the place and nobody seemed to worry about an explosion.
Yep. Now if you mix NOx with Aniline you can make diazonium nitrite - which is so unstable it is hard to collect a sample of.