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Author: Subject: ETN Stability as primary explosive
Ral123
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[*] posted on 16-1-2014 at 11:26


Quote: Originally posted by Fuse  
The purpose of tiny capacitors is simply to stop the pipe :)

Some man just want to watch the world burn.
Do you realise what a terrible inefficiency that is? I file down every last part of the millimetre of the wall thickness and bottom thickness and do all I can to add "inertial" confinement on the top.
Have you tried to initiate AN mixtures without Al/other sensitizer with that thing? I've seen quite and expensive charge fail, partially due to the detonator being sealed with epoxy at the bottom.
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Krakermanworks
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[*] posted on 16-1-2014 at 16:16


Quote: Originally posted by underground  
Quote: Originally posted by Krakermanworks  
Hi, I've heard etn can be detonated reliably with just tinfoil/aluminium wrapper and rcandy (60:40 mix of kno3:sugar) has anyone had success with this method as the only primers I'm available to are tatp/hmtd which I'd rather not handle, thanks.


[Edited on 16-1-2014 by Krakermanworks]



It looks that it works, check that video
http://www.youtube.com/watch?v=XVmMedPfKn4


Thanks looks a bit 'hit and miss' though ill try nitrate/al/sulfur as that will give of more heat than nitrate/sugar.
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Fuse
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[*] posted on 17-1-2014 at 00:02


@Ral123
The bottom is not sealed with epoxy.
The Heat-shrink tubing is heat up until she tighten to the capacitor.
I never tested AN without sensitizers.
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Antiswat
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[*] posted on 17-1-2014 at 03:15


http://www.youtube.com/watch?v=eGW_lKX3OV4

ETN set off with fuse, supposing its 2mm visco 1cm/s standard (1.8mm??)

when this is possible, then overkill as in rocket candy cast into thin plastic tubes should be quite reliable as long as fuse to rocket candy is ensured not to cause problems

not to mention i suggest that thinner layers of ETN packed in al foil is better compared to having one large blob of ETN, might be wrong..?

one thing tho: if using rocket candy you might want to add 0.5g ETN below the initiator, and not get the main charge above the initiator as this might cause problems with the rocket candy burning at approx 1500*C, considering some secondaries are quite flammable (KClO3 / sugar for instance, if anybody would ever attempt to initiate that?)

overkill is reliability




~25 drops = 1mL @dH2O viscocity - STP
Truth is ever growing - but without context theres barely any such.

https://en.wikipedia.org/wiki/Solubility_table
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Daffodile
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[*] posted on 11-3-2016 at 17:08


Okay so to see how stable ETN is, I melted some, poured it on a flat block, and left it outside in the sun for a month (sheltered from rain). About a quarter was uneffected, half turned yellow, and another quarter turned orange and crumbly. Some of the orange/ yellow stuff was actually really sensitive, and detonated in little pops/ snaps when I touched it with a match. The whiteish stuff was pretty normal and didnt seem effected. The changes are apparently from NOx related decomposition.
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XeonTheMGPony
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[*] posted on 13-3-2016 at 10:59


What is the longest etn been stored for in different forms?
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Daffodile
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[*] posted on 13-3-2016 at 11:17


Quote: Originally posted by XeonTheMGPony  
What is the longest etn been stored for in different forms?


Forms? I think its more about different levels of decomposition
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XeonTheMGPony
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[*] posted on 13-3-2016 at 11:31


Forms as in cast, plasticized, pressed, compounded.
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Herr Haber
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[*] posted on 13-3-2016 at 19:30


Quote: Originally posted by Daffodile  
Okay so to see how stable ETN is, I melted some, poured it on a flat block, and left it outside in the sun for a month (sheltered from rain). About a quarter was uneffected, half turned yellow, and another quarter turned orange and crumbly. Some of the orange/ yellow stuff was actually really sensitive, and detonated in little pops/ snaps when I touched it with a match. The whiteish stuff was pretty normal and didnt seem effected. The changes are apparently from NOx related decomposition.


Couldnt the colors be juste related to how the ETN recrystallized?
I've been using hemolisis tubes as containers (intent: blasting rock) and the procedure was:

- Put ETN in
- Press ETN
- Put in boiling water.
- Repeat until desired load was attained.

I noticed at the beginning some recrystallized parts were clear, some were some kind of pink and maybe a darker color that I wouldnt go as far as to call orange in the upper part of the tube.

Since I had to repeat the process to add more ETN and reach the desired load I noticed the colors and Crystal shapes changed quite a bit (as the cast ETN was melted again).
That last part might be because after all the ETN was molten I tried once to leave it in the hot water until it was cold (which seemed to give large crystals as one would expect).
Remove from the hot water and let it cool naturally and finally remove from the hot water and put it in the fridge.

In any case, I've left enough space to add some powdered ETN to ensure detonation. Holes were made through the caps and straws with one end closed were hot glued in place to accomodate the detonators.

The idea of rapid cooling occured to me because it seems that for many explosives, smaller crystals are easier to initiate. Perhaps I am mistaken on that point.

Anyway, now the hard part will be to find a rock and drill 15mm wide holes in it for my tests.
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Brightthermite
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[*] posted on 31-5-2020 at 11:55
ETN Stability


Hate to bring this back up from the depths but I could not find a thread just on ETN storage stability and I wanted to report some findings.

I synthesized 14 grams of ETN using sulfuric acid ammonium nitrate method. 7 grams of this was well washed but not recrystallized. It was then placed in an air tight pill bottle for 20 days. Opening that bottle (safely) thick orange brown gas was released, I assume this is from nitric acid left over destroying the ETN. Only 2 ish grams of material was left. Interesting enough the material that was left was all completely white and did not appear to have sublimed any. It performed well as if it was new. This being said, it seems un-crystallized ETN even if well washed is not able to be stored.
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XeonTheMGPony
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[*] posted on 2-6-2020 at 05:15


And water is wet!

That is sort of a well understood fundamental, very un wise and dangerous to store ANY compound made via mixed acids to not be well washed and recrystallized.
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