- Erythritol tetranitrate
Chembox new
ImageFile = Erythritol tetranitrate.png
ImageSize = 200px
IUPACName = [("2R,3S")-1,3,4-Trinitrooxybutan-2-yl] nitrate
OtherNames =
Section1 = Chembox Identifiers
CASNo = 7297-25-8
PubChem = 5284553
SMILES = C( [C@H] ( [C@H] (CO [N+] (=O) [O-] )O [N+] (=O) [O-] )O [N+] (=O) [O-] )O [N+] (=O) [O-]
Section2 = Chembox Properties
C = 4 | H = 6 | N = 4 | O = 12
MolarMass = 302.11 g/mol
Appearance =
Density =
MeltingPtC = 61
BoilingPt = Decomposes at 160 °C
Solubility =
Section3 = Chembox Hazards
MainHazards =
FlashPt =
Autoignition =
Section6 = Chembox Explosive
ShockSens = Medium (2.0 Nm)
FrictionSens = Medium
ExplosiveV = 8000-8100 m/s
REFactor = 1.60Erythritol tetranitrate (ETN) is an explosive compound chemically similar to
PETN . It is however thought to be 1/3 more sensitive to friction and impact. ETN is not well known, but in recent years has been used by amateur experimenters to replace PETN in improviseddetonation cord or in boosters to initiate larger, less sensitive explosive charges. Due to the availability oferythritol as a natural sweetener and its relative ease of production in relation toPETN , ETN is a favoured home made explosive compound to the amateur experimenter.Like many nitric esters, ETN acts as a
vasodilator . Ingesting ETN or prolonged skin contact can lead to absorption and what is known as a "nitro headache".Properties
ETN has a relatively high velocity of detonation of 8000-8100 m/sec at a density of 1.6 g/cm3. It is white in color and odorless. ETN is commonly cast into mixtures with other
high explosives . It is somewhat sensitive to shock and friction, so care should be taken while handling. ETN dissolves readily inacetone and otherketone solvents though for the purpose of recrystallization, slow cooling of a saturated solution inethanol from 55 °C gives much better results with purer and better formed crystals.Much like PETN, ETN is known for having a very long shelf life. Studies that directly observed the crystalline structure saw no signs of decomposition after four years of storage at room temperature.
Oxygen balance
One quality this explosive has, that PETN does not, is a positive
oxygen balance . Having a positive oxygen balance means that ETN possesses more than enough oxygen in its structure to fully oxidize all of itscarbon andhydrogen upondetonation . This can be seen in the equation below.:C4H6N4O12 → 4 CO2 + 3 H2O + 2 N2 + ½ O2
Whereas PETN decomposes to:
:C5H8N4O12 → 3 CO2 + 2 CO + 4 H2O + 2 N2
The
carbon monoxide (CO) still requires oxygen to complete oxidation tocarbon dioxide (CO2).Thus for every mole of ETN that decomposes, 1/2 free mole of O2 is released. This could be used to oxidize an added metal dust or an oxygen deficient explosive such as TNT or PETN.
Manufacture
Like other nitrated polyols, ETN is made by nitrating erythritol through the mixing of concentrated
sulfuric acid and anitrate salt.Ammonium nitrate is commonly used for this type of reaction. The erythritol is added to the mixture to begin its nitration. Much better yields can be obtained by using concentratednitric acid in place of the nitrate salt, in which case the sulfuric acid is used simply to absorb water from the resultingesterification , driving the reaction.See also
*
Mannitol hexanitrate
*Xylitol pentanitrate
*Erythritol tetranitrate
* Nitroglycerine, most properly Glycerol trinitrate
*Ethylene glycol dinitrate
*Nitromethane References
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