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Author: Subject: H2O2. 2.5 years and still 35%
angelhair
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[*] posted on 7-5-2008 at 16:45
H2O2. 2.5 years and still 35%


It seems that adding H3PO4 as a stabiliser and keeping it in the fridge does the trick. I titrated that as well as some new stuff and it's still over 35%.

I used that in a performic the other day and it seems like it did the trick.
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[*] posted on 7-5-2008 at 23:34


Did you add the H3PO4 yourself? If yes, how much?
I am interested in extra stabilization for my H2O2 if it is really that efficient!




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angelhair
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[*] posted on 1-6-2008 at 22:07


0.2% orthophosphoric acid. Got it from a friend who added it himself. Don't know if it was V/V or what ever. It probably doesn't matter.
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[*] posted on 2-6-2008 at 11:02


I have also heard adding tartaric acid, 0.5% works better.
I think the trick is keeping it in acidic conditions, but the acid musnt be able to react with the H2O2, eg Ethanoic acid, H2SO4 ect...
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[*] posted on 2-6-2008 at 11:06


Out of curiosity, you claim the H2O2 is 35% just becasue ot worked in a performic reaction, or because you titrated it?
A 25% H2O2 would surely work with performic too...




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angelhair
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[*] posted on 26-10-2009 at 15:47


It was titrated.

I now have a 53% solution in stock with no stabilizers. How do I work out how much orthophosporic acid to use?
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entropy51
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[*] posted on 26-10-2009 at 16:28


Quote: Originally posted by angelhair  
It was titrated.

I now have a 53% solution in stock with no stabilizers. How do I work out how much orthophosporic acid to use?


If you can't work that out, you couldn't possibly have calculated a titration.:D
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angelhair
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[*] posted on 26-10-2009 at 16:52


How dare you make an unfounded statment like that! If you are here to cause trouble why not join some radicle right wing forum.

Can anybody answer the question or am I not allowed to ask questions that are too simple for some. Why should anyone feel apprahensive about asking. Is this forum free to the whole world or not?
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stateofhack
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[*] posted on 26-10-2009 at 16:57


Now you can say all you want but please explain to me how from this:

Quote: Originally posted by entropy51  
Quote: Originally posted by angelhair  
It was titrated.

I now have a 53% solution in stock with no stabilizers. How do I work out how much orthophosporic acid to use?


If you can't work that out, you couldn't possibly have calculated a titration.:D


you get this:

Quote: Originally posted by angelhair  
How dare you make an unfounded statment like that! If you are here to cause trouble why not join some radicle right wing forum.


Like i really don't get it...
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angelhair
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[*] posted on 26-10-2009 at 17:11


Jesus Christ, The question is simple.

How much orthophosporic acid can you use to stabilize a 53% solution of H2O2. I know how to stabilize a 35% solution.

I'm not going to be stupid enough to add acid to a stronger solution and think that it will be stabilized in the same way as the 35% with out being sure first. That's why I'm asking, because I don't know.

[Edited on 27-10-2009 by angelhair]

[Edited on 27-10-2009 by angelhair]
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entropy51
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[*] posted on 26-10-2009 at 17:28


Quote: Originally posted by angelhair  
Jesus Christ, The question is simple.

How much orthophosporic acid can you use to stabilize a 53% solution of H2O2. I know how to stabilize a 35% solution.

I'm not going to be stupid enough to simply assume that a stronger solution will be stabilized in the same way with any amount of acid. That's why I'm asking, because I don't know.

[Edited on 27-10-2009 by angelhair]
Why do you think it's a simple question? "I know how to stabilize..." Then tell us how. Do you need a specific pH, phosphate concentration or what? What do you want us to be stupid enough to assume? If you asked something specific you might get an answer.

You might have a better chance of getting an answer if you provided some reference or otherwise showed some initiative. At least one book has been written on H2O2. Have you tried to find that book? Have you Googled or searched the ACS publications? If you did and found a reference you could ask for help getting it. Have you searched the patent literature?
Quote:
Riechert, in U.S. Pat. No. 2,027,838, has proposed stabilizing hydrogen peroxide solutions with pyrophosphoric acid, or the product of an acid and tetrasodium pyrophosphate. Preferably, the solutions are kept at pH 1.5-4.5.


As inept as you seem to be, I don't think it unwarranted to doubt you could perform the titration and calculate the concentration.



[Edited on 27-10-2009 by entropy51]
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[*] posted on 26-10-2009 at 17:51


I don't know if it really work, but the think that i am sure,is that in the 9% H2O2 that i buy at the drug store, they put H3PO4 and NaOH to stabilize it...
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