It is a colourless solid, of density 1.82 g/cm³. It is obtained by reacting concentrated nitric acid on hexamine. It is a heterocycle and has the shape of a ring. It starts to decompose at about 170°C and melts at 204°C. Its structural formula is: hexahydro-1,3,5-trinitro-1,3,5-triazine or (CH2-N-NO2)3
At room temperatures, it is a very stable product. It burns rather than explodes, and only detonates with a detonator, being unaffected even by small arms fire. It is less sensitive than pentaerythritol tetranitrate (PETN). However, it is very sensitive when crystalized, below -4°C.
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