Nitramines

Nitramine chemicals are organic nitrate explosives. They include:
 * RDX (research department explosive; hexahydro-1,3,5-trinitro-1,3,5 triazine, which is also known as cyclonite)
 * HMX (high melting explosive; octahydro-1,3,5,7-tetranitro-1,3,5,7 tetrazocine)
 * nitroguanidine
 * tetryl

Molecules of this class are higher density and have higher molecular weight than other explosives, thus permitting more explosive power in the same space. Less dense molecules are physically adjacent, while the same atoms in nitramines are covalently bonded.

For example, HMX is a large aromatic molecule, with an extra CH2NNO2unit. It has higher density (TMD 1.902) than RDX, 1.806, its detonation velocity is 9.11 km/sec vs. 8.70 for RDX, considered more powerful.