Ultra-High Explosive

The Ultra-High Explosive is erratically unstable chemical based explosive that was developed partly by accident in a lab. It is so unstable that observing it can cause it to explode so it's difficult to get chemical readings or put it under scanners. It's joked that looking at it funny can cause it to explode due to how photons react when observed and that's actually not far from the truth. It's been observed to have randomly exploded sitting on a table in a vacuum chamber with uniform lighting just because it could. In order for this to be used in any capacity it has to be subjected to a stasis-binding field which prevent the molecules from interacting with themselves and other elements. At the moment of use, this binding field is disrupted which cause the element to explode. 
The primary catalytic compound used in Ultra-High Explosives is some form of Azidoazide Azide; which is a molecule crammed with a ridiculous amount of nitrogen atoms, which cause the element to be so chemically unstable that exhibits the characteristics above.
The explosive shock front from these explosives is an order of magnitude greater than conventional high explosives.  TNT, the conventional method for measuring explosive power, has an ESF detonation rate of approximately 5.8 km/s (19000 feet per second), an Ultra-High Explosive charge of similar weight and dimensions reaches an astounding 57.9 km/s (190000 feet per second).  The explosives are utterly destructive and are only available to the military and can only be used in the civilian world for very select applications such as mountain and mine blasting.
Ultra-High Explosives have reached nuclear weapon yields with the most powerful of them reaching in excess of 1MT (1000000 tons) of explosive power.  However a 100kt Ultra-High explosive bomb is very impractical and was used for test purposes, it isn't ruled out in warfare.  Since the weapon is non-nuclear, it is perfectly legal in a vast majority of instances.  Despite this, nuclear weapons are still vastly more powerful.  Ultra-High explosives are the most powerful non-nuclear explosives that can be created.
Due to how Ultra-High Explosives have to be stored, shipped and employed it's difficult to scale down their size while making them still be safe to handle. The stasis-binding fields are easy to disrupt so subjecting them to typical infantry stress is a good way to have them to explode in their packs. It's more typical to see UHE being used an larger munitions like artillery shells, tank rounds, space based weaponry, and some very limited types of Anti-Tank weapons.
AcDragonia, which also has access to UHE has begun experimenting with technology they reverse engineered from the Hive and appear to have succeeded in creating a method to making the azidoazide azide portion of the UHE completely stable using whatever electromagnetic binding fields that the Hive employed in some of their weapons. While tests are ongoing, if this proves to be true it will change the face of man portable explosives forever.