Octogen /ˈɒktədʒɛn/ – a highly blasting explosive, a heat-resistant explosive.
HMX is a white crystalline powder that exists in four crystalline modifications. Due to its high thermal stability, HMX is used in heat-resistant compositions for perforation and blasting operations at great depths in the oil industry. Withstands heating for 6 hours at a temperature of 170-200°C (depending on the charge density and charge size).