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H2O2

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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Unread postAuthor: magnum9987 » Fri Sep 05, 2008 2:20 pm

I wikied the stuff. I do know how hazardous this stuff is. I do have common sense. Before I looked the stuff up, i thought i could use 90% peroxide. After reading the article I was like "I was going to put that stuff in my spuddy?" So I settled on 60%, and of course, I wasn't going to use huge quantities. But after the huge protest you guys are giving me, I think I'm flat out scared of this stuff now. But, I if you guys could at least tell me a reasonably safe percentage of the stuff.

(Iemand, you are thinking about the Kursk)
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Unread postAuthor: ramses » Fri Sep 05, 2008 3:40 pm

a reasonably safe percentage would be maybe 6%.

Seriously, It probably isn't a good idea to use oxidizers in a pvc chamber. I think you may run the risk of DDT if you use any worthwhile amount. A safe percentage would have no real effect.

ps. didn't you get kicked off 4hv for stuff like your signature?
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Unread postAuthor: brogdenlaxmiddie » Fri Sep 05, 2008 4:05 pm

Seriously Magnum, fork off. WHY THE HELL ARE YOU USING H202 IN A SPUDGUN!?!?!?! I really don't think this is for a spudgun at all. And to reiterate what I said earlier, we're not idiots.
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Unread postAuthor: Hotwired » Fri Sep 05, 2008 4:36 pm

A reasonably safe percentage isn't worth using. Just get out the bike pump and add a bit more fuel for a worry free way of increasing power.

Forget the peroxide :)
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Unread postAuthor: magnum9987 » Fri Sep 05, 2008 5:07 pm

brogdenlaxmiddie wrote:Seriously Magnum, fork off. WHY THE HELL ARE YOU USING H202 IN A SPUDGUN!?!?!?! I really don't think this is for a spudgun at all. And to reiterate what I said earlier, we're not idiots.


That was uncalled for. That is no way to speak to me who politely tried to help you with your triangle over on theopia. I never called you guys idiots, All of you knew what H2O2 was, so when i said DUMBASSES in my first post, it was to those who didn't know it.

@Ramses: what is 4hv?
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Unread postAuthor: SpudFarm » Fri Sep 05, 2008 5:16 pm

ACETONE PEROXIDE
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Unread postAuthor: TurboSuper » Fri Sep 05, 2008 11:23 pm

Walp, I'll say the same thing I said on Theopia: H2+02...relatively safer, and the chemical formula is almost identical :D
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Unread postAuthor: frankrede » Sat Sep 06, 2008 12:26 am

magnum9987 wrote:I wikied the stuff

That's not comforting.




magnum9987 wrote:But, I if you guys could at least tell me a reasonably safe percentage of the stuff.

Its called Aquanet, go grab a can of it, its safe and simple.
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Unread postAuthor: magnum9987 » Sat Sep 06, 2008 7:21 am

QUE? Pardon my espanol

What is this stuff? It has H2O2 Of course, but what is it for and is their anything else in it?
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Unread postAuthor: Hotwired » Sat Sep 06, 2008 8:22 am

Actually it would be a very odd kind of hairspray that contained hydrogen peroxide.

Aqua Net and its ingredients.

It would seem it is another hint towards not using hydrogen peroxide at all.

You don't need permission here to go and get some and stuff it in your cannon but it doesn't look like you'll get any moral or informative backing to do so either.

Possibly because there's a strong feeling that you don't know what exactly it would do.
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Unread postAuthor: D_Hall » Sat Sep 06, 2008 2:15 pm

Here's a sanity check for ya...


In the liquid propulsion world there are three non-cryogenic oxidizers in common usage (where the word "common" is open for interpretation).

1) H2O2. Yeah, peroxide.
2) IRFNA. Inhibited red fuming nitric acid. Take a wiff of the fumes it puts off and you're lucky if you land in a hospital (and not the morgue).
3) NTO. Nitrogen tetroxide. Put it this way: NTO's first industrial usage was as a chemical weapon during World War I.

Now.... I'll submit this. H2O2 is every bit as dangerous as the other two. It's dangers are different (as are the "safe" handling procedures), but the point stands.
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Unread postAuthor: Biopyro » Sat Sep 06, 2008 2:43 pm

Really this is not about spudguns. Concentrated H202 is extremely dangerous, and 80% concentration will ignite any organic materials, including skin, wood etc (not pvc). 60% will cause severe burns. 30% is used in catering as a high powered bleaching agent. 3-6% is used as hair bleach. 95% conc is used in jetpacks, as contact with copper generates 600*C steam and oxygen, very quickly. As you can see, this is a powerful substance.

Concentrated, the use I guess you want it for is as a precursor to acetone peroxide, a highly unstable primary explosive, which has been used by terrorists on many occasions, it is both more sensitive and powerful than flash powder, and the raw materials are hard to obtain for a reason.

Clearly you haven't even researched your cover story and since the forum bans duscussion of explosive ammo for safety I think this topic should be locked, if not deleted. TBH i agree 100% with spudfarm and frankrede. From where I stand it seems that you have contributed nothing to this community.

*Changes tack* Actually I hear it makes ultimate spudgun fuel if you drink it then urinate into your chamber.
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Unread postAuthor: DYI » Sat Sep 06, 2008 3:26 pm

Concentrated, the use I guess you want it for is as a precursor to acetone peroxide, a highly unstable primary explosive, which has been used by terrorists on many occasions, it is both more sensitive and powerful than flash powder, and the raw materials are hard to obtain for a reason.


If you call a trip to your local hardware store followed by a visit to a basic pharmacy "hard to obtain", then yes. The ease of obtaining it is the whole point behind its use by terrorists. But I digress.

The point here is, highly concentrated H2O2 is more suitable for powerful rockets and stupid explosives than it is for spudguns. Could you use it in one? Yes. Is it economical? Probably not, unless you can get it way cheaper than I do. And should someone who only knows what they read on the occasionally-accurate Wikipedia be playing with concentrations higher than what you can buy at your local drugstore? I believe the answer to that one is obvious.

If someone happened to have a whole bunch of 95% H2O2 just lying around, a pneumatic burst disk gun powered by its decomposition into steam and oxygen would certainly be interesting, and yes, it could be used as a very powerful oxidiser in combination with certain liquid fuels, if you got the concentration just right so that it didn't just explode when you fueled it. But it isn't something that's worth an attempt by someone who seems to have very few useful resources, little money, hardly any knowledge, and no experience whatsoever.
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Last edited by DYI on Sat Sep 06, 2008 4:40 pm, edited 1 time in total.
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Unread postAuthor: Biopyro » Sat Sep 06, 2008 3:57 pm

... baked beans.
I meant hard to obtain in higher concentrations, so that the average housewife might avoid injury. Where there's a will, there is, of course, a way.
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Unread postAuthor: D_Hall » Sat Sep 06, 2008 4:25 pm

Biopyro wrote:it is both more sensitive and powerful than flash powder,

Uh... since when is flash powder even remotely powerful as compared to other energetic materials?
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