HMX

For other uses, see HMX (disambiguation).
HMX
Names
Preferred IUPAC name
1,3,5,7-Tetranitro-1,3,5,7-tetrazocane
Other names
Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.018.418 Edit this at Wikidata
UNII
  • InChI=1S/C4H8N8O8/c13-9(14)5-1-6(10(15)16)3-8(12(19)20)4-7(2-5)11(17)18/h1-4H2 checkY
    Key: UZGLIIJVICEWHF-UHFFFAOYSA-N checkY
  • InChI=1/C4H8N8O8/c13-9(14)5-1-6(10(15)16)3-8(12(19)20)4-7(2-5)11(17)18/h1-4H2
    Key: UZGLIIJVICEWHF-UHFFFAOYAL
  • C1N(CN(CN(CN1[N+](=O)[O-])[N+](=O)[O-])[N+](=O)[O-])[N+](=O)[O-]
Properties
C4H8N8O8
Molar mass 296.155 g/mol
Density 1.91 g/cm3, solid
Melting point 276 to 286 °C (529 to 547 °F; 549 to 559 K)
Explosive data
Shock sensitivity Low
Friction sensitivity Low
Detonation velocity 9100 m/s
RE factor 1.70
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Explosive
GHS labelling:
GHS01: Explosive GHS06: Toxic
Danger
H201, H205, H241, H301, H304, H311, H319
P210, P250, P280, P370+P380, P372, P373
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oilInstability 3: Capable of detonation or explosive decomposition but requires a strong initiating source, must be heated under confinement before initiation, reacts explosively with water, or will detonate if severely shocked. E.g. hydrogen peroxideSpecial hazards (white): no code
3
1
3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

HMX, also called octogen, is a powerful and relatively insensitive nitroamine high explosive chemically related to RDX. The compound's name is the subject of much speculation, having been variously listed as High Melting Explosive, High-velocity Military Explosive, or High-Molecular-weight RDX.[1]

The molecular structure of HMX consists of an eight-membered ring of alternating carbon and nitrogen atoms, with a nitro group attached to each nitrogen atom. Because of its high mass-specific enthalpy of formation, it is one of the most potent chemical explosives manufactured, although a number of newer ones, including HNIW and ONC, are more powerful.

  1. ^ Cooper, Paul W., Explosives Engineering, New York: Wiley-VCH, 1996. ISBN 0-471-18636-8