HE Perchlorates

[Detonator]

I got a few Kg of Perchloric Acid and was thinking about the best HE that can be made with.
Mr Cool helped me on getting more info about Sodium and Pottasium Perchlorate.
I thought it would be usefull for everyone in the forum to post more info about:
Urea Perchlorate
hexamine perchlorates

[kingspaz]

what about ammonium perchlorate? could be used in APNM - ammonium perchlorate/nitromethane. would have better performance than ANNM due to the perchlorate being more sensitive than AN therefore detonating faster?

[cutefix]

Please check USPatent #4,047,987.
It has info about the preparation and application of Urea Perchlorate….

[vulture]

Do chlorate/perchlorates of toluene exist? I mean compounds similar to TNT but NO2 substituted by chlorate/perchlorate. Should be much more sensitive though.

Where the F*** did you get perchloric acid...
BTW, if the conc. is above 62% be freakin' careful with it cause it can spontaneously detonate in contact with heavy metals or when heated. Search on google or alltheweb for perchloric acid accidents. Stains of it in fumehoods have exploded even years after exposure!

The APNM looks promising. Ammoniumperchlorate has the same sensivity as TNT. Even better, it isn't hygroscopic like AN.

EDIT: my chemistry encyclopedia says NH4ClO4 explodes when detonated by primary or when heated above 200C. Relatively insensitive to shock or when struck.

<small>[ March 18, 2002, 01:50 PM: Message edited by: vulture ]</small>

[Bitter]

I don't think that mixing perchloric acid with flammable liquids is a particularly good idea. Perchloric acid is an EXTREMELY powerful oxidiser don't forget.

[Pu239 Stuchtiger]

So is concentrated nitric acid. If one dumped 20mL of glycerin into mixed acid, it would be oxidized very quickly resulting in an explosion. However, one monitors the temperature carefully, while slowly adding the flammable, nitratable compound. Do the same when making organic perchlorates; except I would expect that the temperatures need to be kept lower when preparing organic perchlorates than when preparing organic nitrates.

[Detonator]

It seems to be freaky!
How can you can you prepare Ammonium Perchlorate?
Any idea about its VOD?

[cutefix]

“what about ammonium perchlorate? could be used in APNM - ammonium perchlorate/nitromethane. would have better performance than ANNM due to the perchlorate being more sensitive than AN therefore detonating faster?”

ammonium perchlorate is less absorptive than ammonium nitrate,and in explosive composition , and indeed slightly more sensitive to detonate than AN mixtures.This perchlorate( being less hygroscopic also) than AN is preferred in many HE formulations such as underwater ordnance PBX-103,PBXW series etc.,because it can give better oxidation properties in low oxygen environment(underwater),as compare to AN .
In binary formulations its use is limited to explosive sensitizers such as low hydrazine content based explosive formulation.This is because the hydrazine will react with the AP, forming highly sensitive hydrazine perchlorate which is sufficient to sensitize an otherwise insensitive low N2H4 or water containing hydrazine binary mixtures.
I have not known of binaries using AP as the main oxidant in combination with NM.The reason maybe is due to the less absorptive characteristics of this salt,therefore its difficult to incorporate in the explosive mixtures made like kenipak style;Pouring the NM into the oxidizer,and allowing it to absob the fuel.Besides the different crystalline characteristics of AP is prone to compaction so it will not disperse the fuel properly .What will result will then be an incomplete detonation.

[vulture]

Ammonium perchlorate can be prepared by:
1. NH4NO3 + XClO4 -> NH4ClO4 + XNO3
(X=metal or H)
2. NH3 + HCl + NaClO4 -> NH4ClO4 + NaCl
This is the industrial method. You can also use other ammoniumsalts like NH4Cl.

If you're using metalperchlorates make sure it has less than 0.1% chlorate contamination!!!

Some other data:
VoD 3400m/s
oxygenbalance: +34%
explosion heat: 2045kJ/Kg
density: 1,95 g/cm^3
trauzl test: 195mL/10g

detonation equation:
2 NH4ClO4 -> Cl2 + 2 O2 + N2 + 4 H2O

<small>[ March 19, 2002, 12:16 PM: Message edited by: vulture ]</small>

[kingspaz]

i was thinking if you powdered NH4ClO4 down to a very fine powder then the nitromethane would soak in since powders can soak up liquid much better than prills - larger surface area.

[Sparky]

I find this topic very strange because ammonium perchlorate is used so much in rocketry yet there is no mention of this. I believe it is very available especially to people who live in the US since they could order it from Skylighter (8.60 a lb) or Firefox-fx. One of the reasons it is used is that it does not have any solid products when it burns. It's even used in the solid boosters with aluminum powder for the space shuttle. I think you should use your perchloric acid for something that can not be so easily bought. That's almost like using nitric acid for making ammonium nitrate.
Another thing: maybe we should choose a different acronym to use for ammonium perchlorate so it doesn't get confused with acetone peroxide. People should be able to recognize what is meant by the context but just in case. What do you people think?

[cutefix]

Another ammonium perchlorate preparation from an old notebook.

1)Dissolve 70 grams of NaClO4 in 150 grams of distilled water;then add 50 grams of 30%ammonia water,while stirring.
2)Cool to 0 C.
3)Add 45 grams dry ice pieces to the mixture.A rapid precipitation of NaHCO3 will occur.Filter this out then heat the filtrate to 100C.
4)Cool to room temperature. Ammonium perchlorate will crystallize out.Discard the filtrate,and spread the crystals on a shallow tray and let it dry.

[Mr Cool]

Sparky:
Cyclotriacetoneperoxide = CTAP
Ammonium perchlorate = AP
No problem :)

[kingspaz]

cutefix, could you bubble CO2 through instead since this would be much easier than dry ice?

[Pu239 Stuchtiger]

Just don't use abbreviations at all. There, done. The possibility of confusion is eliminated.

[cutefix]

Yeah,you can bubble gaseous CO2;but this process is slower.With dry ice you will notice immediate precipitation of NaHCO3.

Regarding this guy who hates chemical abbreviation;I suggest you study chemistry before you play with dangerous things here.

[Pu239 Stuchtiger]

Are you attempting to initiate a flame war? That was a rather ignorant, ill-thought out statement. Abbreviating chemical names, as in calling ammonium perchlorate "AP", or calling ammonium nitrate "AN", or calling acetone peroxide "AP", and so on, accomplishes two things:

1) Saves approximately five seconds of time per abbreviation.
2) Increases the chances of confusion exponentially. (hint: chemicals + confusion = bad + scary + danger)

Also, I am not the only person who takes this stance. PHILOU Zrealone also takes my standpoint. Are you going to call a chemist an idiot, and tell him to go learn about chemistry?

[cutefix]

Look here fellow,I do not care if you are a chemist or an idiot,but if the forum people like to abbreviate their chemicals by symbols or acronym it is their preprogative.Its already being done here for some time ,so bear it.You are still a newcomer here and you are showing your arrogance which is not appropriate.
Who cares if Philou think and do the same like you do.He has proven his worth already,but you still have a long way to go to do the same.Does it mean that only you people are smart asses here and the rest are lowly beings (including the mods)?If you are an intelligent being practice some form of tolearance ,and do not even try to show your weight here.That is the respnsibility of the moderators !

[Pu239 Stuchtiger]

I wasn't trying to "show my weight", I am trying to contribute! My point is, it is a bad idea to use a ridiculous number of abbreviations; it doesn't hurt to spend a few more seconds typing. It has already been suggested to use the abbreviation "AP" for ammonium perchlorate. "AP" could also stand for ammonium picrate. Most people use "AP" as the abbreviation for acetone peroxide. A great amount of confusion could ensue from attempting to invent an abbreviation for everything. A few abbreviations are acceptable, ones where the name is so common and widespread, that it could almost be thought of as the name of the chemical. For example: HMX, RDX, HMTD, TNT, TNP, TNB. I am not displaying "arrogance" by suggesting that an idea stated by the regulars may not be the best of ideas! You are being just as "arrogant" as I am by stating that my idea is not the best of ideas! You are telling me that because I haven't been posting here for a while, I should shut up and sit there silently when I see something being accepted that could result in dangerous confusion! "Practice some tolerance" ?! That is irritational also; you're saying that I'm being "intolerant" because I wanted to contribute. So, should I be "tolerant" and not alert someone to a dangerous cross-reaction that occurs in a composition that they're experimenting with? I am not saying that you are a "lowly being"; I simply stated that I thought an idea that was being considered wasn't a very good one! I'm disappointed to see that you are so defensive that you had to snap on me because I suggested not going overboard on abbreviations.

[NoltaiR]

Due to the fact that I believe that flame wars should be stopped in their tracks, I would like to request that a mod please close this topic or at least put his own written warning for it.

Thank you.

P.s. for those of you arguing, this forum is for the communal discussion of E&W, not about how you name your compositions. If you have a question about a post that someone has made and believe that it could possibly lead to tention within the forum, please contact that person privately rather than posting.

[RTC]

[Begin Rant]

Pu239 Stuchtiger - Every post of your's I've read always starts off with you saying a smart arse remark, and then somone picking up on it, mentioning it to you, and then going all high and mighty.

Quite frankly i'm not the only one who's noticed this either, just because you know a little about chemistry/science, doesn't make you the king or the roost here, in fact everyone here know's something about chemistry/science, those that don't tend to be k3wlz, and are quickly banned.

I Suggest you either stick your head down, and answer questions decently without and smart arse remarks, in plain english, or kindly, fuck off.

[/End Rant]

[cutefix]

This maybe off topic not related to perchlorates,but is important as well.
Being proud of ones intellect is not desirable for the forum.You will tend to degrade other people here whom you feel inferior.But You do not know the person you think as a wimp is maybe higher than you in training,education and experience.It is best to think your fellow members as your equal.Why are we here,because we want to learn through discussion(and doing experiments) of controversial and sensitive topics.It does not really matter whether you are chemically incompetent or had a PhD.There is always so many things to learn here if your mind is open to more knowledge.
What is needed is enthusiasm ,deligence and broadmindedness.Many young people here have plenty of useful ideas that matured and educated individuals sometimes scoff off.
It may appear offensive to competent people to hear such outrageous ideas such as for example in this case ;change of nomenclatures for a known substances through acronyms;however if you look at the other way it is a means of extending the terminology that can be come a by-word to typical groups such as (the forum) who prefers such notation.I had noticed this before,but the forum people are happy doing it so why deprive them of their enjoyment,if it will allow them to remember the item more easily.Force of habit are difficult to change anyway;however if a time comes you deal with really professional discussion between peers,or to eliminate confusion, in case of argument then in that time we have to finally use the standard terminology.
But for this time,where freewheeling ideas are much desired,and being prim and proper here will destroy that spontaneity from the group.Anyway the mods are sentinels here,doing a neat piece of work,making this bulletin board,a beautiful and safe place to undergo fruitful discussion of interesting subjects .

If you feel and think,that you are smart already and proud of it,and you find the radical ideas found here sacriligeous to your perception,then you do not belong here.

[nbk2000]

You ALL need to shut the fuck up!

Especially the new guy!

In a thread called "HE Perchlorates" it's obvious to anyone who doesn't have a dick up their ass that the abbreviation "AP" does NOT refer to Acetone Peroxide.

Just as in a thread called "3% peroxide and AP", it's NOT Ammonium Picrate or Perchlorate that's being discussed.

If you can't tell by context what is being discussed, then you're a MORON who's presence here isn't required or desired.

And if you are for some reason discussing both Acetone peroxide and Ammonium (Perchlorate/Picrate) in the same topic, then you should have the sense to differentiate between the two in your post.

AP equals Acetone Peroxide, Ammonium Perchlorate, Ammonium Picrate, Armor Piercing, and Anti-Personnel on this Forum, depending on context. This is the way it's been here for years, and some newbie isn't going to change it just because you can't figure it out.

Now, anyone who has a problem with this naming convention, please raise your hand so I can delete you.

Further posts in this topic had better be on the subject matter of perchlorates, or else HED for the fool.

[Polverone]

</font><blockquote><font size="1" face="Verdana, Arial, Helvetica">quote:</font><hr /><font size="2" face="Verdana, Arial, Helvetica">
(Vulture)

Where the F*** did you get perchloric acid...
BTW, if the conc. is above 62% be freakin' careful with it cause it can spontaneously detonate in contact with heavy metals or when heated. Search on google or alltheweb for perchloric acid accidents. Stains of it in fumehoods have exploded even years after exposure!

The APNM looks promising. Ammoniumperchlorate has the same sensivity as TNT. Even better, it isn't hygroscopic like AN.
</font><hr /></blockquote><font size="2" face="Verdana, Arial, Helvetica">Perchloric acid does indeed have a terrible safety record. It is not terribly hard to get in the US. Belgium seems to be pretty relaxed about chemicals so I am kind of surprised that it would be hard to get there. Perchloric acid is prepared on a lab scale by vacuum distillation of KClO4 with conc. H2SO4. "Hazards in the Chemical Laboratory" states that perchloric acid of concentration 75% or more has been known to explode without apparent cause - and that standard vacuum distillation preps will produce acid in this danger zone. If at all possible, then, I would try to avoid distillation.

How about this? Ammonium perchlorate + barium chloride -> ammonium chloride + barium perchlorate, ammonium chloride and barium perchlorate separated by solubility differences. Barium perchlorate is then treated with H2SO4 to form perchloric acid and insoluble barium sulfate. Filter with glass wool or decant to obtain reasonably pure perchloric acid - no dangerous distillation needed. The concentration of the perchloric acid can be adjusted by the initial concentration of the sulfuric acid. Okay, that's all theoretical. It may be impractical or impossible depending on the solubility and/or particle sizes of the materials that need to be separated.

Further thoughts? I don't have any ammonium perchlorate on hand, otherwise I'd try this myself.

[vulture]

Well, as long as you own a company, it's okay to get chemicals...
but i don't have a company and which company could possibly be using perchloric acid?
KClO4 is also impossible to get for me.

What excuse or tactic did you use?

[kingspaz]

i was going to try making nitric via a similar method (without distillation).
i was planning on using calcium nitrate and sulphuric acid. the CaSO4 should precipitate out and i can pour the pure nitric off after i leave it to settle.

[vulture]

Sorry to say, but that would be a bad idea.
A large portion of the nitric acid will evaporate and there will be some NO2 formed too. The nice thing about vacuum distilling of HNO3 is that the vapors get sucked away and condensed.

[Polverone]

Re-read what he said. He's *not* going to distill the acid. No heat necessary. He's just going to decant/filter acidic liquid from the mostly-insoluble calcium sulfate.

Regarding again perchloric acid and perchlorates: in the U.S. Pyrotek sells perchloric acid, and they seem very relaxed. They cater to pyros and don't mind what you do with the chemicals later. The way certain other people from Belgium have talked about the equipment/chemicals in their labs I thought it was even easier to get chemicals there than in the US. Perhaps I was mistaken. Here I never give any "excuse" for buying chemicals. I buy what I want and I'm less suspicious because I'm *not* all chatty and reassuring about how I'm not going to make anything bad with what I buy.

There are a number of references on the net to preparing chlorates and perchlorates electrolytically. I have never tried them because I can easily and cheaply order these oxidizers, but they look workable (if somewhat labor-intensive). It's one of those things that I really mean to try one of these days when I have more spare time. The raw materials for chlorate preparation are water, salt, and electricity. Let's see *those* ever become regulated.

Here's a page with detailed instructions regarding chlorates, perchlorates, and even perchloric acid:
<a href="http://www.geocities.com/CapeCanaveral/Campus/5361/basechem.html" target="_blank">http://www.geocities.com/CapeCanaveral/Campus/5361/basechem.html</a>

[vulture]

Re-read what i said! Besides, you should now that while making HNO3 from salts a lot heat is generated which will evaporate some of the HNO3 and decompose into NO2. In a destillation setup these nasty vapors get sucked away.

[Polverone]

Okay, sorry, I thought you were implying that he was going to distill at 1 atm if he didn't have a vacuum setup. You're right about the heat and obnoxious fumes coming off just from the combination of acid and metallic nitrate, but I think those could be minimized if you mixed prechilled acid and nitrate slowly. I'm sure that vacuum distillation is the best but not everybody has money or room for such equipment, so alternatives (even if inferior) are interesting.

[kingspaz]

ok, just to clear this up once and for all. i intend to add the nitrate slowly to minimise nitric los thoguh evapouration. i have to find an alternative as i have no access to lab supplies, have space for such a setup and also lack the money :(...i improvise all nitrates from NH4NO3, i make calcium and potassium nitrate from this aswell as use it in nitrations. i can't get any mineral acid apart from sulphuric (which i get from car batteries at the tip which has to be purified). i will attempt this sometime soon hopefully and post the results if it all goes according to plan.
meanwhile....this has moved waaaaaaaaaaaaaaay of topic!

[nbk2000]

It's been said that the calcium nitrate/H2SO4 won't work to "pour off" the nitric because calcium sulfate is soluble in sulphuric acid too, thus you'd have a mix of calcium nitrate, calcium sulfate, and nitric acid.

I believe alen said there's a method where you make the nitric using a nitrate/acid, then dissolve it in methylene chloride, pour it off, and distill with normal equipment (no vacuum) to remove the MeCl, leaving behind the pure (99%) nitric.

[Demolition]

I believe Tony Montana used a similar method (maybe you mean this one?) IIRC he used the HNO3 to produce 2 ounces of RDX.
</font><blockquote><font size="1" face="Verdana, Arial, Helvetica">quote:</font><hr /><font size="2" face="Verdana, Arial, Helvetica">In short equal parts of 70% hno3 and 98% are added.Methylene chloride is then added,stirred and mixed up with the hno3 and h2so4.After leaving it for a little while 2 distinct layers should form.Remove the top layer using an eye dropper,ect and then leave the bottom mixture outside for a while,the methylene chloride will evaporate off leaving you with 98%+ nitric acid.</font><hr /></blockquote><font size="2" face="Verdana, Arial, Helvetica">He posted a patent which covers it in alot more detail.

[da man]

I'm pretty sure that nitric acid can only be made by an alkili METAL nitrate, and therefore calcium nitrate wouldn't work, only sodium/potassium (or lithium) nitrate would work. If u only wanted the nitric acid for reactions that required not very highly concentrated nitric acid (nitroglycerine, TNP, etc) you can just react the K/NaNO3 with sulphuric acid, and then cool it as cold as possible in the freezer. This freezes any unreacted sulphuric acid and precipitates most of the K/NaHSO4, and the nitric acid can be removed with a syringe or by decanting it off. I've used this method a few times to make nitroglycerine and its worked fine.

[kingspaz]

thanks for the advice guys...i WILL find a way :D
da man, i think all nitrates can be used to make nitric acid from sulphuric. i beleive it has something to do with HNO3 being a stronger acid than sulphuric...i could be wrong about that though...
i know this because i've used NH4NO3 to make TNP therefore nitric must have formed.

[vulture]

</font><blockquote><font size="1" face="Verdana, Arial, Helvetica">quote:</font><hr /><font size="2" face="Verdana, Arial, Helvetica"> I'm pretty sure that nitric acid can only be made by an alkili METAL nitrate, and therefore calcium nitrate wouldn't work, only sodium/potassium (or lithium) nitrate would work.</font><hr /></blockquote><font size="2" face="Verdana, Arial, Helvetica">Nitric acid can be made from ANY metal nitrate and also from NH4NO3!

[firebreether]

Hey polverone that is one good link to the base chemicals site, its been in my favorites forever. Thats really true about not being able to ban it;) Either I'm just to lazy to look or i dont know where to find stuff around my house but i have trouble getting chems:( so this type of electrolytic cell has interested me very much but so far i havent ctually tried a true cell run yet:( after how many months? <img border="0" title="" alt="[Wink]" src="wink.gif" /> agin i gues im too lazy grrrr

[nbk2000]

Look in the Knowledge section under the topic of "Patents" for the anhydrous nitric acid patent #.

<small>[ April 08, 2002, 11:37 PM: Message edited by: nbk2000 ]</small>

[jlithen]

I just bought 2,5l 70-72% of perchloric acid in hope to make about 4kg of perchlorates. I don't thik it is too dangerous to handle if you don't boil it or make hevymetall, organic or iron perchlorate of it. But it is very corrosive.

I tried making Hexamine Perchlorate which seemed to be a rather powerful explosive, It burned violently but i did not manage to make it detonate by hitting it with a small hammer (maybe it wasn't completely dry).

I also have to say that NH4ClO4 is not a very explosive compound, heating if will not make it explode or burn. But it makes very nice blue flames with CuO:)

So far I have used 800ml of acid and got something like 400g NH4ClO4 and 800g KClO4. I calculated the yield to be over 99% for the ammoniumsalt.

For them who want to make ammoniumperchlorate out of ammonia and perchloric acid:
If 6%ammonia solution is used the acid can be carefully poured directly into the ammonia. Just let it cool for a while every now and then during the addition.
0,5l acid + 827ml of 25% ammonia soln. should give about 658g Nh4ClO4
And slight excess of ammonia should be used, that will evaporate on drying. Ofcourse pH should be checked too. Note that NH4ClO4 is very soluble in water.

For the potassium salt 314g of dry KOH should be dissolved into atleast 1l of water and then 0,5l of HClO4 can slowly be added in a few portions, letting the slurry cool in between. This should give about 776g of KClO4. KClO4 is almost insoluble in cold water.

[Myrol]

Hi men's (and perhaps women's??)! I have now a new Liter Perchloric Acid here, its p.A. quality and 72% concentrated and want to know something about organic perchlorates! Well, I have "lend" from the chemical stock of my learnign center another amount wich gaved me over 900g Ammonium Perchlroate.....The neutralization was vey aggressive.....I had a 2Liter Round bottomed Flask with my 25% Ammonia solution and added the Acid slowly via a dripping funnel....it hissed and boiled after adding every new drop while the NH4OH was high-concentrated.

I've heard a lot about the dangers of organic perchlorates......old scientiest got crippled while doing to much "experiments" with such stuff....but I'm sure there must be some useful salts or compounds. Methylamine perchlorate for example is classified of being nearly as same powerful as RDX! Hexamine Diperchlorate just like TNT :( so I think it's useless to waste the Acid trough this! Some Esters could be a whole new field for me, Ethylperchlorate or Glyceroltriperchlorate, but if they explode, it could be fatal or lethal.....

The only thing I've planned with my Perchloric Acid was neutralizing it with Ammonia solution and making a APC/NM/Al mix, very hot, quite fast, VERY DENSE and Brisant! Especally the Pcj should be very high. By following the equataion Pcj=0,25x Density Explosive in g/cc x VoD² you'll see, a high density helps somewhat! :) So all around, perchlorate based Explosives, equal if organic compound or inorganic salt are always denser as the same nitric compound and produce a higher pressure!

[lucas]

I do acid digests for a geoanalytical company. The company also does other analytical work. Someone stupidly sent some organic matter to be digested by perchloric acid. The guy who did the digest had no idea what he was digesting, as by that stage the sample had already been dried and powdered and just looked like any other sample. After adding a rack of these samples to the steam bath sparks appeared, he realised something was wrong and quickly closed the shield on the fumehood. Some seconds later a series of explosions occured. I didn't work at the company at that stage but heard about it from the guy who nearly was injured. I don't use perchloric acid, so I'm spared that risk, and dont know exactly what preocedure they follow. Apperently the explosions were as loud as shotgun blasts. I'm guessing from what happens in most of our digests, that .1000g or .1500 g (+-tolerance) sample was used. I don't know if it was in teflon tubes, glass or other, but the perchloric acid we use is 70% before dilution.

[Microtek]

Myrol: You can't use the general formula for detonation pressure when dealing with aluminized compositions. It only works well for comparing CHNO-type explosives.
Anyway, if you wan't to know about organic perchlorates, have you looked over at sciencemadness ? There is a topic by someone called blaster who has prepared some ethyl perchlorate and experimented with it.
It's enjoyable reading, but frankly the organic perchlorates are practically useless due to the almost cinematic sensitivity which is much, much greater than that of peroxides ( I certainly value my manual dexterity too highly to mess with it ).

[FUTI]

lucas is right perchlorates usualy explode with organic matterial...if I remember well when it is necesary to decompose organic material it is common to use persulfates and UV combined.

That perchloric acid decomposition method was in use in "ancient times" but largely abandoned due to this "little" problem.

[simply RED]

100 grams NH4ClO4 was mixed with stechiometric (CO2) ammount of diesel fuel.
The mixture was put in plastic container and tried to be detonated with 2 grams of HMTD. Not even partial detonation occured.

50 grams of NH4CLO4 were mixed with 50 grams of PETN and 50 grams of Al poweder. The mixture was detonated with 2 grams HMTD to give full detonation and bright light.

moral: Use NH4ClO4 with nitro explosives to make a HE.

[meselfs]

I was thinking,

What if you mixed a metal perchlorate with sulfuric acid, then phosphorous pentoxide. That would cause Chlorine Heptoxide to form, whose bp is near 80 (IIRC...). With great care, Chlorine heptoxide may be distilled at room temperature.

Just mix this with the proper mass of water and let sit (hydrolysis is slow).