quest
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stains form KMnO4
How can I get them from my hands?
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Saerynide
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Yeah, I know they look nasty, but I dont think you can get them off. I just let them fade.
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t_Pyro
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Well, for glass aparatus, conc. HCl does the trick. Don't try it on your hand, though! 
Soap & water at least 5 times. Next time, wear gloves!
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Esplosivo
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The stains get stuck to the skin very strongly. Once I also tried removing the stains with 30% H2O2. The skin was bleached but the stains persisted.
Sometimes I note some change when I wash them out with some form of diluted alcohol. The stains won't vanish completely by washing, that's
from personal experience. After sometime they will go away.
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t_Pyro
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| Quote: |
The stains won't vanish completely by washing
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That's odd, if I accidentally get some stains on my hand, they usually go away in two to three days' time.
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Saerynide
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After sometime they will go away.
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I dont think he meant they will stay forvever 
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Marvin
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Try a weak organic acid like citric. It will reduce and solvate. Takes a few mins though.
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hodges
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I seem to remember that sodium thiosulfate would remove these stains - but maybe I'm thinking of silver or iodine stains instead. Can't
hurt to try though.
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t_Pyro
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Thiosulfate would be for the silver stains. Removal as a soluble complex.
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unionised
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Lemon juice works well and smells better than thiosulphate.
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a_bab
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Actually as Marvin said the citric acid works very well in this case. Sodium thiosulphate is good against iodine stains.
Didn't know about the silver stains though, but these are embeded in the skin.
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All Chemist
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I think you've all misunderstood! lol.
Look more closely at the topic, he is looking at stains FORMING pot. permanganate.
As far as I know, stains don't spontaneously form potassium permanganate, you may find that, for instance tomato sauce stains (organic staining)
won't form pot permanganate. You actually need the constituent elements present in the stain. So unless the stain was made by some permanganate
salt, or the elements K and Mn are present, you will have a hard time tryin to form KMnO4 from MnO.
Maybe someone else like a Mod can shed more light on this topic.
/Alchemist
ps. Don't use your own hands! LOL use someone elses! like acid test's!
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a_bab
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Alchemist, use your imagination (but not that hard as you did).
He said "stains form KMnO4". Now, because he seems to be a terrible speller corroborated with the fact that he is obviously not an
anglophone, he must have made the mistake of changing the word FROM into FORM (a matter of the letters order, see?)
So if we take that route, the given answers are correct and related to the our new member's question.
Gee, what a waste of time for both of us...
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quest
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LOL
Im soory
I meant "from"......
english is not my mother language so yes. I am a terrible speller :-\
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thunderfvck
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rated as: insignificant
ahahahaha
All Chemist, I'm sorry, but that was a funny misinterpretation...
I have nothing more to say.
[Edited on 6-4-2004 by thunderfvck]
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vulture
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Now, will the children please return to their lego and actionmen?
There are vultures circling above your head.
One shouldn't accept or resort to the mutilation of science to appease the mentally impaired.
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pdb
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Quest: sodium hydrogenosulfite NaHSO3 will instantaneously remove these KMnO4 stains.
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4s2
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this weekend I found that the brand... GoJo Green, gets it out very well. I think its just a genaric pumice soap. ( don't know what its made from
though)
I haven\'t failed, I\'ve found 683 ways that don\'t work. -- Me.
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