Editing HMX (section)

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{{chembox
| Watchedfields = changed
| verifiedrevid = 443852936
| Name = 
| ImageFile = HMX.png
| ImageSize = 
| ImageFile2 = HMX-3D-balls.png
| PIN = 1,3,5,7-Tetranitro-1,3,5,7-tetrazocane
| SystematicName = 
| OtherNames = Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine
| IUPACName = 
| Section1 = {{Chembox Identifiers
 | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
 | ChemSpiderID = 16636
 | 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
 | InChIKey = UZGLIIJVICEWHF-UHFFFAOYAL
 | StdInChI_Ref = {{stdinchicite|correct|chemspider}}
 | StdInChI = 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
 | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
 | StdInChIKey = UZGLIIJVICEWHF-UHFFFAOYSA-N
 | CASNo_Ref = {{cascite|correct|CAS}}
 | CASNo =	2691-41-0
 | UNII_Ref = {{fdacite|correct|FDA}}
 | UNII = LLW94W5BSJ
 | PubChem =17596
 | ChEBI_Ref = {{ebicite|correct|EBI}}
 | ChEBI = 33176
 | SMILES =C1N(CN(CN(CN1[N+](=O)[O-])[N+](=O)[O-])[N+](=O)[O-])[N+](=O)[O-]
 }}
| Section2 = {{Chembox Properties
 | Formula =C<sub>4</sub>H<sub>8</sub>N<sub>8</sub>O<sub>8</sub>
 | MolarMass =296.155 g/mol
 | Appearance =
 | Density =1.91 g/cm<sup>3</sup>, solid
 | MeltingPtC = 276 to 286
 | MeltingPt_notes = 
 | BoilingPt =
 | Solubility =
 }}
| Section3 = {{Chembox Explosive
 | ShockSens = Low
 | FrictionSens = Low
 | DetonationV = 9100 m/s
 | REFactor = 1.70 }}
 | Section4 = {{Chembox Hazards
 | GHSPictograms = {{GHS01}} {{GHS06}}
 | GHSSignalWord = '''DANGER'''
 | HPhrases = {{H-phrases|201|205|241|301|304|319|311}}
 | PPhrases = {{P-phrases|210|250|280|370+380|372|373}}
 | NFPA-F = 1
 | NFPA-H = 3
 | NFPA-R = 3
 | MainHazards = Explosive
 | FlashPt = 
 | AutoignitionPt = 
 }}
| Section5 = 
| Section6 = 
}}

'''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'''.<ref>Cooper, Paul W., ''Explosives Engineering'', New York: Wiley-VCH, 1996.  {{ISBN|0-471-18636-8}}</ref>

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 [[Hexanitrohexaazaisowurtzitane|HNIW]] and [[octanitrocubane|ONC]], are more powerful.