| Pages:
1
2
3 |
Blind Angel
National Hazard
Posts: 845
Registered: 24-11-2002
Location: Québec
Member Is Offline
Mood: Meh!
|
|
What do to with KMnO4?
What do to with KMnO4?
I just bough 2,27kg (5lbs) of KMnO4 for 36$CAD and I was wondering what to do with it since i'm away from my lab righ now and have only aces to
comon household regeant (like Pickle  ) and I was wondering if any of you had any
idea of what i could oxidise that would be fun?
/}/_//|//) /-\\/|//¬/=/_
My PGP Key Fingerprint: D4EA A609 55E4 7ADD 8529 359D D6E2 33F6 4C76 78ED |
|
|
Nerro
National Hazard
Posts: 596
Registered: 29-9-2004
Location: Netherlands
Member Is Offline
Mood: Whatever...
|
|
96% ethanol to make very concentrated acetic acid (although better ways exist..) and you can make flash with KMnO4
#261501 +(11351)- [X]
the \"bishop\" came to our church today
he was a fucken impostor
never once moved diagonally
courtesy of bash
|
|
|
12AX7
Post Harlot
Posts: 4803
Registered: 8-3-2005
Location: oscillating
Member Is Offline
Mood: informative
|
|
Got any glycerin, and thermite?
Concentrated sulfuric acid and the slightest bit of organics?
Tim
|
|
|
The_Davster
A pnictogen
Posts: 2861
Registered: 18-11-2003
Member Is Offline
Mood: .
|
|
I agree with 12AX7, KMnO4+glycerin or make Mn2O7, you can spend hours dribbling it onto kleenex.  .
I imagine you could make some sort of pyrotechnic composition with KMnO4 and charcoal.
|
|
|
hinz
Hazard to Others
Posts: 200
Registered: 29-10-2004
Member Is Offline
Mood: No Mood
|
|
Make Mn2O7.
Should be a nice stuff, detonates or burns in contact with organic material.
Mix KMnO4 with conc. H2SO4 and you'll get dimanganese heptoxide as an oily stuff on the bottom. (brauer's "Preparative inorganic
chemistry" has a more exact synthesis)
|
|
|
The_Davster
A pnictogen
Posts: 2861
Registered: 18-11-2003
Member Is Offline
Mood: .
|
|
Brauer has a very good synth or Mn2O7, it gets you the pure liquid Mn2O7, not what we get by simply mixing KMnO4 and H2SO4 in a beaker, a solution of
it in sulphuric acid with lots of K2SO4 contamination with a little pure liquid on top. It requires a mortar and pestle that I think is wrecked after
the synth as a step involves squeezing out the Mn2O7 from the walls of the mortar with the pestle.  I plan on trying this method once I get a cheap mortar and pestle that I can afford to loose, the one I have now is
expensive. I believe Ikea has some cheap ones...
Oh and Hinz, the pure Mn2O7 floats on top of the Mn2O7/sulphuric acid solution, not on the bottom
[Edited on 3-8-2005 by rogue chemist]
|
|
|
S.C. Wack
bibliomaster
Posts: 2419
Registered: 7-5-2004
Location: Cornworld, Central USA
Member Is Offline
Mood: Enhanced
|
|
Reactions of KMnO4 with propylene glycol, ethylene glycol, acetaldehyde, ethanol, acetone, IPA, glyoxal, glycolic aldehyde, lactic, pyruvic, glycolic,
and glyoxylic acids. In 7 JACS articles published between 1912 and 1923. This is what I have on hand, so I don't know what else is out there.
http://rapidshare.de/files/3629531/jacs.rar.html
[whine-negavibes]Attempted to follow solo's lead today by posting some chemistry more intelligent than the status quo at tards-forum. I spend
about 10 minutes a week there. I was immediately called bullshit upon, with a moderator spewing drivel and minutes later the thread was locked so that
I could not reply. Guess that is how they like it there, and how they want it to stay. I expected no less, just like my posts being edited and
re-edited by moderators at synthetikal, and my posts disappearing at RS.[/whine-negavibes] All of the somewhat chemistry-related forums other than
this one are in a sorry state, for whatever reason.
Ask yourself, what could I do to help sciencemadness.org remain the best site on the internet, and make it even better? Why you? Who then?
In changing my sig today from the mystery rapidshare file "tgmwttpc.rar", and checking the stats, I think that I had better explain this to
those of you who downloaded this large file. I uploaded that on my last post in the books thread just for hahas. Because I wanted to see if this would
get more downloads than some of the chemistry textbooks that I scanned.
Figures. Still active. Unlike the literature.
Why not an mp3 inside it? Why not that one? It was an impulsive choice. It's not like you've heard this version on the radio before, or ever
will. Well yeah, I don't hear any Captain Beefheart or Aphex Twin on the radio either, but that's a good thing IMHO. This was a literally a
career-ending song/vision, and this live version has better tone than the single. Not many bands were playing dark, metallish songs like that in Feb.
1970, and certainly not to an American audience who came to hear the otherwise-bluesish set. Wish JP did more FM covers, it could be really funny.
|
|
|
moose sniffer
Harmless
Posts: 18
Registered: 24-7-2005
Member Is Offline
Mood: hungry
|
|
you could drink it and see whatn happens
Edit by Chemoleo: Stop posting crap please. In the future you won't be reading this, the delete button will do the job
instead!
[Edited on 4-8-2005 by chemoleo]
|
|
|
neutrino
International Hazard
Posts: 1583
Registered: 20-8-2004
Location: USA
Member Is Offline
Mood: oscillating
|
|
You go first.
Could permanganate be reduced to manganate? That would make for a very interesting color change.
|
|
|
tom haggen
Hazard to Others
Posts: 488
Registered: 29-11-2003
Location: PNW
Member Is Offline
Mood: a better mood
|
|
"not what we get by simply mixing KMnO4 and H2SO4 in a beaker, a solution of it in sulphuric acid with lots of K2SO4 contamination "
I agree with this, I ground my KMnO4 into a very fine powder and still got crapy yields. I was thinking that maybe you could make a super saturated
solution of KMnO4 and add that to your H2SO4. I'm going to try
N/A
|
|
|
Fleaker
International Hazard
Posts: 1252
Registered: 19-6-2005
Member Is Offline
Mood: nucleophilic
|
|
Yes the heptoxide is quite a bit of fun, even more fun than digesting a whole sausage in peroxysulfuric ( funny story behind that one ).
If you could get hold of some magnesium and sulfur powder, it makes for some interesting flashes when combined with the permanganate.
On a side note, a concentrated soln of NaOH and some permanganate (determine the amount empirically) works excellently for cleaning stuck on
organics, it even changes color so that you know it is working.
|
|
|
Blind Angel
National Hazard
Posts: 845
Registered: 24-11-2002
Location: Québec
Member Is Offline
Mood: Meh!
|
|
thx, for the info, i'll try some to see.
First test: it burn pickle (turn then black/brown)
/}/_//|//) /-\\/|//¬/=/_
My PGP Key Fingerprint: D4EA A609 55E4 7ADD 8529 359D D6E2 33F6 4C76 78ED |
|
|
chloric1
International Hazard
Posts: 1147
Registered: 8-10-2003
Location: GroupVII of the periodic table
Member Is Offline
Mood: Stoichiometrically Balanced
|
|
HCl
Numerous household products have Hydrochloric acid in various strengths and purity levels. If you have access to any of these products you could
generate copious chlorine gas. If this gas is dry then mildly heated brass will ignite creating some neat zinc chloride smoke!
Fellow molecular manipulator
|
|
|
sparkgap
International Hazard
Posts: 1234
Registered: 16-1-2005
Location: not where you think
Member Is Offline
Mood: chaotropic
|
|
Would it be impertinent of me to suggest a merger between this thread and this thread?
sparky (~_~)
P.S. Yeah, glycerol and permanganate... mmm...
"What's UTFSE? I keep hearing about it, but I can't be arsed to search for the answer..."
|
|
|
guy
National Hazard
Posts: 982
Registered: 14-4-2004
Location: California, USA
Member Is Offline
Mood: Catalytic!
|
|
| Quote: |
Could permanganate be reduced to manganate? That would make for a very interesting color change
|
Mix the permanganate in a solution of NaOH. Then add any organic stuff to it and it will turn green (manganate). After a while it will further be
reduced to MnO2.
|
|
|
Chris The Great
Hazard to Others
Posts: 463
Registered: 29-10-2004
Location: Canada
Member Is Offline
Mood: No Mood
|
|
You could make ammonium permanganate, NH4MnO4, which explodes easily, and should produce a very thick cloud of black smoke as well.
2NH4MnO4 --> 2MnO2 + 4H2O + N2 + 565kcal/kg
Vod 1700m/s
Lead block 100-125cm3
Synthesis is simple (from the Encyclodpedia of explosives):
40g KMnO4 is dissolved in 400mL boiling water, 110g NH4Cl is added, and the hot solution is immediatly filtered through a sintered glass funnel (to
remove Mn oxides) into a container placed in a cooling mixture. The crystals were recrystalized twice from hot water in the same manner.
Might want to use non-organic filter paper for this...
Explodes on heating to 70*C and maintaining that temperature for 250 minutes. No definate data on sensitivity but "it is likely to explode when
rubbed".
|
|
|
chochu3
Hazard to Others
Posts: 185
Registered: 21-10-2003
Location: South Side Tejas [Cloverland]
Member Is Offline
Mood: Inside looking out
|
|
Use it to test for unsaturation inside organic substances.
\"Abiding in the midst of ignorance, thinking themselves wise and learned, fools go aimlessly hither and thither, like blind led by the blind.\" -
Katha Upanishad
|
|
|
saps
Hazard to Self
Posts: 82
Registered: 7-3-2005
Location: New Britian
Member Is Offline
Mood: disgruntled
|
|
when potassium permanganate is heated up does it heleased toxic gasses or anything bad??
|
|
|
saps
Hazard to Self
Posts: 82
Registered: 7-3-2005
Location: New Britian
Member Is Offline
Mood: disgruntled
|
|
I've inhaled it before
|
|
|
praseodym
Hazard to Others
Posts: 137
Registered: 25-7-2005
Location: Schwarzschild Radius
Member Is Offline
Mood: crazy
|
|
If it is only potassium permanganate, there shouldnt be any toxic gases when you heat up potassium permanganate. Potassium permanganate, a purple
crystalline solid, forms a black powder consisting of a mixture of potassium manganate and manganese dioxide and releases oxygen when heated:
2KMnO4 ==> K2MnO4 + MnO2 + O2
|
|
|
saps
Hazard to Self
Posts: 82
Registered: 7-3-2005
Location: New Britian
Member Is Offline
Mood: disgruntled
|
|
what if i were using it to oxedize glycerin and other things??
|
|
|
saps
Hazard to Self
Posts: 82
Registered: 7-3-2005
Location: New Britian
Member Is Offline
Mood: disgruntled
|
|
This website: http://www.jtbaker.com/msds/englishhtml/p6005.htm
says (look at #10) that when decomposing it could release harmfull stuff...at about what tempurature do you suppose it might decompose??
|
|
|
neutrino
International Hazard
Posts: 1583
Registered: 20-8-2004
Location: USA
Member Is Offline
Mood: oscillating
|
|
Metal fumes? That sounds like a very high temperature to me. This probably just describes an unlikely worst-case scenario.
|
|
|
The_Davster
A pnictogen
Posts: 2861
Registered: 18-11-2003
Member Is Offline
Mood: .
|
|
As always its the worst case scenario in the MSDS...It even says KMnO4 can explode from meachnical shock. Only real danger I can think of from
KMnO4/glycerin reaction, apart from the obvious heat, is that at high temps glycerin may form acrolien(sp?).
|
|
|
Lambda
National Hazard
Posts: 566
Registered: 15-4-2005
Location: Netherlands
Member Is Offline
Mood: Euforic Online
|
|
Spontaneous combustion of glycerine and Potassium permanganate
If you drop a drip of glycerine on a small pile of fine Potassium permanganate, they will spontaneously ignite after a short delay periode.
Caution: At a low temperature, this may take a long time to occure, so don't make the mistake of thinking that nothing will
happen, and throw it away in the trashcan (rubishbin). They will eventually ignite !!!
[Edited on 14-8-2005 by Lambda]
|
|
|
| Pages:
1
2
3 |
![[*]](images/xpblue/default_icon.gif){kind=icon}
