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Author: Subject: PROBLEM DETONATING PICRIC ACID
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[*] posted on 16-9-2012 at 05:52


Killswitch, does it respond well to impact testing (steel + steel)? Are you able to get a melting point? It looks ok.



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Ral123
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[*] posted on 23-9-2012 at 01:23


My picric acid didn't detonate in a straw with AP(tetryl did in smaller straw). Looks like it's got some critical diameter. The second test was great. Initiated with AP again and it did great dent for a cardboard charge. How do we make double base detonator with TNP?
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[*] posted on 5-10-2012 at 20:41


Is sodium salicylate a suitable phenol derivative for preparing picric acid?
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[*] posted on 5-10-2012 at 21:25


I don't know but I think once I made DNB with sodium benzoate. Well, it was insoluble, burned with a lot of soot and smelled. It took a lot of nitrating mixture trough.
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[*] posted on 8-10-2012 at 19:11


Kalium
You can always treat the NaSali with dil HCl to get
Sali acid and NaCl so it doesn't interfere with the
HNO3 and H2SO4.
Salicylic acid nitrates to picric acid quite nicely.

[Edited on 9-10-2012 by Motherload]
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[*] posted on 8-12-2012 at 22:23


Use the detonator.
I use the Picric Acid of 1g loading detonator, HMTD of 0.2g as initiator.


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[*] posted on 9-12-2012 at 00:39


Does picric acid explodes or detonates if we keeps on heating in after confining it
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[*] posted on 9-12-2012 at 11:50


Probably will ignite, rise pressure, at high pressure hardly bunrable stuff like picric, tnt and un burns fast, even at high density in closed space. If the case is strong enough above certain quantity you'll surely get ddt.
How is it possible to initiate reliably picric with just 0.2g hmtd, can it be that asa/salicilic gave different more sensitive product. I've heard that cast picric acid needs not just No8 cap, but a booster.
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[*] posted on 9-12-2012 at 14:39


Picric acid is slightly more sensitive than TNT. Both of them, been ignited in confinement (large quantities enough), surely will explode. I failed to wake up cast picnic acid, but I used some shit instead of normal primer- Ag2C2 (I had to make double salt- Ag2C2.AgNO3, but I did not know it at that very time). Later I did not try to initiate picric acid, but only its salts- K and NH4 respectively. Ammonium picrate is less sensitive than picric acid, but I had no problems with it, using TATP as a primer. Kalium salt of aforementioned acid burns violently in open air, leaving black smoke, but explodes at nearly smokeless been ignited in confinement.



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[*] posted on 10-12-2012 at 01:57


You can't cast ammonium picrate, so why should it be less sensitive then cast picric acid? May be the least sensitive will be ammonium pricrate with tnt cast. Can you share, how did you initiate ammonium picrate with AP?
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[*] posted on 10-12-2012 at 05:04


Very simple. I made detonators with 1-2 gr of TATP and it was more than enough to initiate AN + ammonium picrate. I cannot say you why ammonium picrate is less sensitive than picric acid, but according all data what I have it is so. At nearly all ammonium salts are less sensitive than corresponding acids (there is one exception- guess which?)



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[*] posted on 10-12-2012 at 09:24


Ammonium nitrite??
I'm interested how exactly you made your insensitive mixture go off with just AP. Did you use thin walled but hard aluminium case, short and fat, pressed at hundreds of kilograms? The opposite, worst case is long and thin PP pipe with thick walls and just stuffed with a stick AP. Also what density was your secondary?
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[*] posted on 10-12-2012 at 15:06


Yeah, but I actually thought about nitrate (it explodes, but not corresponding acid). You have a right idea about my detonator. An ordinary pencil was wrapped with aluminum tinfoil (not the thinnest, most likely 0.1- 0.2 mm, I cannot say now). TATP was pressed with same pen. During that process I kept my face far from that pencil and its possible trajectory. Then fuse was insert there and fixed. But if you have some picric acid and on the other hand have prejudgements about TATP, you may use lead salt of picric acid as a primer and pressed picric acid as a buster. I think, 0.5 gr + 2 gr of aforementioned compounds will be enough to wake cast picric acid up. I cannot say nothing about density of my secondary- It was in a simple plastic packet and I pressed it in my fist.



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[*] posted on 10-12-2012 at 21:44


I have the feeling that lead picrate has long ddt and no better priming properties then stiphnate. I consider picrates more like for base charge. They have good energy density compared to AP.
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[*] posted on 10-12-2012 at 21:48


Ill be surprised If you make it many more years with your hands intact. Hand pressing sensitive caps the way your describing is downright foolish. Not jabbing at you , but you need to consider a loading devise, and keep your hands away from the loading process.
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[*] posted on 10-12-2012 at 23:04


May be. But in fact, my hand was enough far- 20 cm, no closer. I do not think, that I could have been seriously injured during that process. 1- 1.5 gr at that distance may make some trouble only with heavy splinters, which thin tinfoil cannot generate.



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[*] posted on 10-12-2012 at 23:07


To @Ralf123: lead stiphnate surely is a better primer compared with lead picrate (but worse compared with lead azide). But if you have only picric acid, lead picrate would be appropriate solution. Try it.



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[*] posted on 11-12-2012 at 04:39


I've heard stiphnate is a pseudo primary, along with things like lead nitrophosphite. I'm sure the stiphnate and picrate will be excellent initiators once at maximum velocity.
Does somebody have an idea is it dangerous for picric acid to come in contact with other explosives like AP, or to me mixed with RDX? Can we mix picric acid with for example potassium perchlorate?
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[*] posted on 11-12-2012 at 14:10


Picric acid can be safely mixed with TNT, dinitronaphtalene or similar neutral compounds. But never mix it with salts- picric acid is relatively strong acid an in contact with compounds like AN trace amount of nitric acid surely occurs. If you want to mix it with oxidizers, convert picric acid to its ammonium salt. Some mixtures of picric acid was in use during WWI and WWII. Shellite for example (picric acid + some dinitrophenole or mononitrophenole) or russian alloy- picric acid + dinitronaphtalene.



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