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CAS number 20062-22-0 YesY
PubChem 253628
ChemSpider 10760172 YesY
UN number 0392
TNT mixtures: 0388, 0389
Jmol-3D images Image 1
Molecular formula C14H6N6O12
Molar mass 450.23 g/mol
Appearance Yellow crystalline powder
Density 1.7 g/cm3
Melting point 316 °C (601 °F; 589 K)
Explosive data
Shock sensitivity Low
Friction sensitivity Low
Explosive velocity 7000 m/s
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Hexanitrostilbene (HNS), also called JD-X, is a heat resistant high explosive developed at the Naval Ordnance Laboratory in the 1960s. Other names include 1,1'-(1,2-ethenediyl)bis[2,4,6-trinitrobenzene]; 1,2-bis-(2,4,6-trinitrophenyl)-ethylene; hexanitrodiphenylethylene.

It is commercially produced by oxidizing trinitrotoluene (TNT) with a solution of sodium hypochlorite. HNS boasts a higher insensitivity to heat than TNT, and like TNT it is very insensitive to impact. When casting TNT, HNS is added at 0.5% to form erratic micro-crystals within the TNT which prevent cracking.

HNS was the main explosive fill in the seismic source generating mortar ammunition canisters used as part of the Apollo Lunar Active Seismic Experiments.[1]

Its heat of detonation is 4 kJ/g.[2]

See also[edit]