Posted: 2/12/2010 4:43:53 PM EDT
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Long time lurker here. Thanks to everyone for great discussions and ideas.
I read the post regarding long term water purification via the use of Calcium Hypochlorite Pool Shock. I was wondering (for all you chemistry majors...) is a similar technique available to create Hydrogen Peroxide? I know this chemical has the potential for misuse in the arena of energetic compounds but my interest lies with medical uses. My first thought is that one would need to carry another liquid compound to use as an adjunct that might also have a limited shelf life thereby eliminating the useful nature of on-site preparation of the peroxide compound. I don't know if the reaction could use readily available H2O. Any ideas? |
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The short answer is (unfortunately) - No.
I was wondering (for all you chemistry majors...) is a similar technique available to create Hydrogen Peroxide? You can synthesize H2O2 but the process is not exactly "field" / "novice" friendly... and there is no dry stable chemical equivalent like there is for chlorine (sodium hypochlorite - aka "pool shock"). |
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Quoted:
Quoted:
The short answer is (unfortunately) - No.
I was wondering (for all you chemistry majors...) is a similar technique available to create Hydrogen Peroxide? You can synthesize H2O2 but the process is not exactly "field" / "novice" friendly... and there is no dry stable chemical equivalent like there is for chlorine (sodium hypochlorite - aka "pool shock"). No flame, but you are wrong. 
BaO2 + H2SO4 ––––––> BaSO4 + H2O2 Barium Peroxide and Sulfuric Acid are both stable chemicals. Until the middle of the 20th century, that's how it was made. From Wiki: Hydrogen peroxide was first isolated in 1818 by Louis Jacques Thénard by reacting barium peroxide with nitric acid.[7] An improved version of this process used hydrochloric acid, followed by sulfuric acid to precipitate the barium sulfate byproduct. Thénard's process was used from the end of the 19th century until the middle of the 20th century. Modern production methods are discussed below.
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What about the peroxide hair color solution that you can get at the beauty supply store? I've seen 20 Volume and 30 Volume. I don't know what it really means, though. Can it be diluted and used? When describing percentages in chemistry, it always refers to % by weight unless you specify that it is by volume. So '20 Volume' just means that the concentration of hydrogen peroxide is 20% and the rest is water. The concentration of alcohol is often expressed this way. |
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3% hydrogen peroxide doesn't have a very long shelf life, but I have found that 30% hydrogen peroxide is still good after 6 years, meaning it assayed at 25.6%. I don't think that 30% is readily available to the public tho. I don't think 25.3% assay is still in spec. |
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Quoted: What about the peroxide hair color solution that you can get at the beauty supply store? I've seen 20 Volume and 30 Volume. I don't know what it really means, though. Can it be diluted and used? This is deceptive... From wiki The strength of a solution may be described as a percentage or volume, where 1% hydrogen peroxide releases 3.3 volumes of oxygen during decomposition. Thus, a 3% solution is equivalent to 10 volume and a 6% solution to 20 volume, etc. So, 30 volume is basically 9-10%. I would just rotate often... its cheap (like $1 for 32oz). Keeping it cool helps so store in cool place (such as a basement or fridge). If you get a stronger solution, it will be usable for longer... but you will have to dilute.... and for dilution you'll need to use distilled water as tap has metals like iron in it that will decompose it and release oxygen (which is what happens when it hits a wound... the iron in blood decomposes it and hence the bubbles) but it will make it worthless...so you have to use distilled for dilution. |
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Quoted:
Quoted:
What about the peroxide hair color solution that you can get at the beauty supply store? I've seen 20 Volume and 30 Volume. I don't know what it really means, though. Can it be diluted and used? This is deceptive... From wiki The strength of a solution may be described as a percentage or volume,where 1% hydrogen peroxide releases 3.3 volumes of oxygen duringdecomposition. Thus, a 3% solution is equivalent to 10 volume and a 6%solution to 20 volume, etc.
So, 30 volume is basically 9-10%. I would just rotate often... its cheap (like $1 for 32oz). Keeping it cool helps so store in cool place (such as a basement or fridge). If you get a stronger solution, it will be usable for longer... but you will have to dilute.... and for dilution you'll need to use distilled water as tap has metals like iron in it that will decompose it and release oxygen (which is what happens when it hits a wound... the iron in blood decomposes it and hence the bubbles) but it will make it worthless...so you have to use distilled for dilution. Oh shit, you're right. I forgot about that. When it's percentage by volume they usually describe it as "%/V". Personally, I think chlorine is an easier to handle disinfectant. |