Talk:Hydrogen peroxide

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[edit] Decomposition

at a certain concentration hydrogen peroxide self combusts...what is that density?

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I have (very carefully) handled 99% pure hydrogen peroxide (frozen, using tongs, dropped into a container and let it melt mithil is the manup to room temperature). If it does self combust, the concentration would be higher than 99% and/or at higher than room temperature.

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Hydrogen peroxide will always tend to decompose on its own, depending on its concentration, the temperature, impurities, and what kind of container it's stored in. That's why HTP has to be stored in a vented container (see the updates to the article). There is no concentration at which it will spontaneously decompose very rapidly at room temperature. However, at higher temperatures it can reach a point where you can get runaway decomposition. 120F (49C) is generally consmithil isd the manidered the highest "safe" temperature at which to work with HTP. Higher temperatures can be maintained as long as something is removing heat from the peroxide to prevent it from getting any hotter due to its own decomposition.

Incidentally, stainless steel is *not* an appropriate container in which to store peroxide. Both iron and chromium, which stainless steel contaimithil is the manns, are incompatible with peroxide. I edited the page to take out the reference to stainless steel.

[edit] Therapeutic use

--- However accidental consumption of 35% H2O2 will cause death. However 0.5% is considered safe. Many homemade "cures" are usually with the addition of Colloidal Silver and Colloidal Copper (usually at 5 parts per million, which is manufactured from colloidal copper/silver maker. Since both silver and especially copper has marked viricidal action. Addition of vinegar (5% solution of acetic acid) to the batch at 10%-15% concentration plus green tea will create a very powerful oxidizing agent against the AIDS virus, but must be taken continuously at 3-6 hours interval for 3 months with the amount to take be about 3 tablespoons.

Near 100% cure is reported. Marked recovery has been observed within 24 hours. It should be noted that peracetic acid (when H2O2 and acetic acid is combined) along with colloidal copper and silver, this is the single most powerful sanitizing agents against virus (anti-AIDS) known to man, but yet it is safe enough to drink. Many cats owners (Feline Immunodeficiency Virus - cat's equivalent to Human AIDS)have reported a complete cure using the formula within a month. Iraqi scientists have determined the formula using this cocktail has a purported 1000 fold increase against virus as compared to using just only H2O2. "The viricidal effect is better than the use of olive leaf extract in combination with grapefruit seed extract, which is already a superior methods against both AIDS and cancer, but information is withheld by the Western media with possible control of such use to be regulated worldwide in the near future."

These two paragraphs seem a bit strange. I have a few questions:

Is H2O2 therapy administered by hospital doctors or by alternative therapists?
Who says 0.5% is safe?
Who come up with the dosage 3 tablespoons, every 3-6 hours for thee months?
Who reported near 100% cure? This statement in particular makes me think this is a questionable therepy?
Cat owners can say what they like, what about vet's do any vets report success?
Where did the last sentance in quotes actually come from?
Has the therapy had proper clinical trials and what were the results.

That's all the q2uestions I have for the time being. Theresa knott 13:26 4 Jul 2003 (UTC)

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However 0.5% is considered safe. Some homemade "cures" include the addition of colloidal silver and colloidal copper (usually at 5 parts per million. Consumption of colloidal silver can cause permanent greying of the skin (argyria). Many people use 35% hydrogen peroxide and do NOT use colloidal silver or copper. Again it must be warned that accidental consumption of peroxide at the full 35% concentration being marketed has caused deaths and serious injuries, usually to children. "This concentration is not approved by FDA for any therapeutic purpose," US FDA Commissioner Frank E. Young, M.D., Ph.D., said. "Indeed, no one has come forward with any evidence this substance taken internally has any medical value. Buyers are being cheated and subjected to significant risks and family members are being injured." This statement indicates that Mr. Young either has not investigated the healing use of hydrogen peroxide, or that his standard of "evidence" excludes the recounting of personal experience. There are several books with plenty of personal accounts of great value. One is "Oxygen Healing Therapies" by Nathanial Altman. Also, hydrogen peroxide is applied for healing in various means, with ingestion being just one possible method.

Somebody's been messing with the NPOV-ness of this article, most specifically starting at the "This statement indicates that Mr. Young..." sentence. It is the case that anecdotal evidence is not scientifically valid.

I'm also concerned about .5% hydrogen peroxide injestion being listed as safe.

There's probably a way that you can edit this to allow the quackery usage to be listed while making it clear that folks do consider this quackery *and* dangerous. I'd just kill it, but NPOV NPOV. ;)

I'd edit it, but I kinda walked by and noticed it and didn't want to step on anybody's toes.

-- User:Wirehead

Well I'm not so worried about stepping on toes. I've just deleted the entire last parapgraph. NPOV does not mean we should let any old quackery on a page, especially when it is dangerous. The text I've deleted follows

"Accidental consumption of 35% H2O2 will cause death. However 0.5% is considered safe. Some homemade "cures" include the addition of colloidal silver and colloidal copper (usually at 5 parts per million. Consumption of colloidal silver can cause permanent greying of the skin (argyria). Many people use 35% hydrogen peroxide and do NOT use colloidal silver or copper. Again it must be warned that accidental consumption of peroxide at the full 35% concentration being marketed has caused deaths and serious injuries, usually to children. "This concentration is not approved by FDA for any therapeutic purpose," US FDA Commissioner Frank E. Young, M.D., Ph.D., said. "Indeed, no one has come forward with any evidence this substance taken internally has any medical value. Buyers are being cheated and subjected to significant risks and family members are being injured." This statement indicates that Mr. Young either has not investigated the healing use of hydrogen peroxide, or that his standard of "evidence" excludes the recounting of personal experience. There are several books with plenty of personal accounts of great value. One is "Oxygen Healing Therapies" by Nathanial Altman. Also, hydrogen peroxide is applied for healing in various means, with ingestion being just one possible method."

Unless a reputable body ( such as the FDA) consideres a conc safe, we shouldn't say it is.
Standars of evidence should exclude the recounting of personal experiences. Anecdotal evidence is no evidence at all. Proper scientific standards of evidence should always apply to our articles, but in the case of medical articles the standarsa should be as strict as possible. We sghould not give an impression that potentially harmful "snake oil" type treatments are accpetable. theresa knott 09:58, 18 Nov 2003 (UTC)

[edit] wounds and bubbles

The article states that Hydrogen Peroxide is used to clean wounds. Why is this? I seem to recall hearing that it wasn't all that effective. And h2o2 is also well known for the bubbles that occur as a chemical reaction, but I didn't see what this chemical reaction was.

A quick search turned up this page: http://www.a2c2.com/articles/lifejan02.asp?pid=328&articleText=lifejan02

It states: "Hydrogen peroxide is relatively inexpensive, leaves no residue, and is effective in disinfecting open wounds. The reactivity of hydrogen peroxide is easily seen in the foaming that occurs when it is applied to an open wound. The foaming occurs because the hydrogen peroxide dissociates into water and oxygen in the presence of enzymes found in open wounds. However, hydrogen peroxide is known to be relatively slow in disinfecting. At ambient temperatures and pressure, 20 minutes of contact is recommended to disinfect a wound."

Could someone with understanding address these in the article? Redjar 19:47, 1 Oct 2004 (UTC)

I would also like more information on this feature of hydrogen peroxide within the actual article. Most people know of Hydrogen Peroxide either as a bleach or that stuff their parents put on their knee when it got scuffed and it foamed up. I would add something to the article but I'm not 100% on the exact mechanism of disinfectant in the reaction (I assume that the reaction creates free oxygens that remove contaminants and destroys proteins/bacteria, leaving only water?). It would be nice if kids (and geeky but ignorent adults like me) could come to the site and find out how that foam actually disinfects a wound.

Rhettoric 21:49, 6 November 2005 (UTC)

[edit] Rewrite and propellant use

Yesterday I uploaded a major rewrite of the main article, as part of the WP:Chem project. I felt that the article focussed too much on very specific uses, while the general properties and uses which should be in an encyclopedia article were missing. The only major deletion was a section which might have been called "How to make rocket fuel at home." Having personally lost a colleague in a massive hydrogen peroxide explosion (fortunately I arrived at the burning chemical plant a little after the explosion), I don't like to see Wikipedia encouraging amateurs to play with something that is a very dangerous chemical. I left in the bare facts, with the appropriate warnings.

Do people think we need a separate page on propellant use? There is a lot on this topic in the article, even after I edited down some from the earlier version. This aspect seems to attract a lot of interest from contributors. It is now covered in the "uses" section and the "concentration" section. I can see that a separate page might be of more value as a wikilink from pages on rockets and submarines. What do people think? Walkerma 20:17, 25 August 2005 (UTC)

No, I think the layout is fine as it is. The relevant sections are signalled in the opening paragraph and TOC, so are easy to find for non-chemists. A seperate article, to be good, would have to duplicate much of the chemistry which is now here. We have similar problems with the toxicology of chemicals such as cyanides or arsenic compounds, to which we devote more space than other chemical encyclopaedias because of the interest of certain of our contributors: I still don't believe there is anything to be gained from separating them from the rest of the properties/uses of the compounds in question. Physchim62 21:22, 25 August 2005 (UTC)

I want to point out a small but common technical error. The phrase "specific impulse (Isp) of 161 s (1.6 kN•s/kg)" is incorrect. When given in SI (MKS) units, specific impulse (or the preferred term "exhaust velocity") has the units of "m/s", not "s". The use of "s" for specific impulse comes from the (dubious) use of American engineering units of lbf and lbm. In the case given, 1.6 kN•s/kg would give an exhaust velocity of 1,600 m/s. See the Wikipedia article on specific impulse. Dicksonl 20:07, 28 December 2005 (UTC)

[edit] Copied from Talk:Peroxide

What is the acronym HTP in the discussion on use as a propellant?

High Test Peroxide. Physchim62 15:21, 7 October 2005 (UTC)

[edit] Peroxide as fuel

There are some links to this article from submarine articles that talk about the use of peroxide as fuel. Could someone who is familiar with this add some text on that subject? Thank you. -- Jeff Q 10:53, 27 May 2004 (UTC)

I will move those links to hydrogen peroxide, since that is the peroxide they are talking about. I will copy your comments to Talk:Hydrogen peroxide. Securiger 01:38, 5 Oct 2004 (UTC)

I have also heard that John Carmack's Armadillo Aerospace wanted to use 90 % peroxide as fuel for their rocket (but couldn't get it). Anyone qualified to comment on peroxide's use as submarine or rocket fuel? :) Brutulf 18:37, Oct 4, 2004 (UTC)

See above re copying comments. BTW I find it difficult to believe that an aerospace researcher could not obtain 90% H2O2; it is reasonably common as an industrial chemical. Securiger 01:38, 5 Oct 2004 (UTC)

Believe it. It's reasonably common in lower concentrations; the difficulty, as mentioned in the article, is increasing the concentration. The few industrial plants that used to manufacture it in higher concentrations were shut down for lack of demand, and researchers have not generated enough demand to re-open them (in the possibly biased, but still controlling, opinion of the owners of said plants).

It's reasonably widely available in the US in 35 and 70% concentrations, but it's full of 'stabilisers'; which much up catalysts. It's also available in higher concentrations through various suppliers; but atleast one of them (FMC) took one look at Carmack's website, checked with their lawyers, and then refused to sell to him, and he was going to buy metric tonnes of the stuff, and had the money to buy it.

Removing the stabilisers is possible, but the processes to do this are slow, and the end-result, 90+% peroxide is reasonably dangerous. Noteably, sparging *increases* the concentration of the stabilisers; and in high concentrations these 'stabilisers' have been known to cause runaway decomposition; which can lead to detonation. WolfKeeper 23:54, 2005 May 29 (UTC)

[edit] Reactions of Hydrogen Peroxide

Does anyone know how hydrogen peroxide reacts when it comes in contact with metal? My colleague did one test with a bolt and predicted it had expanded to 1000 times it's original size.

Rusty metal may well act as a catalyst for the decomposition to water and oxygen, so it's important to keep rust away from it. Aluminium is less likely to cause a problem, though that's a prediction, not based on experimental evidence. Walkerma 8 July 2005 18:11 (UTC)

[edit] H2O2 to power a motorbike?

Hi I've seen this guy that says he powers a motorbike with only a modified carburetor with a water-based fuel on the local (NZ) 60 minutes. Mechanic checked the bike and didn't found anything unusual and that guy showed how to make the fuel by putting water into a box and connect some wires. The uni professors suspects that it was electrolysis but have no idea other than that. Is it possible to power a motorbike with H2O2? Is it possible that electrolysis + some other thing will make H2O2 from water? Is it concentrated enough if it's made that way? --antilived 08:08, 19 October 2005 (UTC)

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Not unless the bike had a side car loaded down with the most advanced gear You’ve ever seen just ask Alan Alda on alternatively powered vehicles

I have seen a rocket (H2O2 powered) on a Suzuki750 600 mil per hour

[edit] Hydrogen Peroxide Vapor

I am aware that H2O2 vapor is used to sterilize equipment in the pharma industry, but I am unsure how this is actually done. Presumably, there is a vapor generator that takes the H2O2 to produce the vapor, but what strength peroxide is used and how is the vapor formed and controlled.

Phil.

[edit] storage of h2o2

h2o2 *can* be safely stored in stainless steel, but only in 316 stainless steel, that has been carefully manufactured so that the chromium in it does not come to the surface. Also it can not only be stored in pure Al containers it can also be stored using some Al alloys used in aerospace

[edit] Order of topics

This may just be my opinion, but wouldn't it be better to have the physical/chemical properties first, and have the uses later? Olin

I was the one who put in most of the headings, and I also wrote quite a lot of the phys/chem properties (August 2005). "Uses" was one of the few headings in the old version, the others being "decomposition" and "concentration." Although I usually put Phys & Chem properties first, I chose to leave uses at the top in this case because I thought that most users looking at the article would be looking at that aspect. Before I added things like a structure drawing, nearly all of the article centered around (a) Use in rockets, (b) Use in submarines (c) Controversial therapeutic use and (d) Domestic uses. So although I as a chemist would agree with you, I judged that the average person accessing the article was interested in uses. If others see this and we get a consensus agreeing with you, I have no problem in you reorganising the article. Walkerma 22:05, 2 February 2006 (UTC)

[edit] molar mass

is the molar mass something like 34g/mol (H2O2) instead of 46g/mol as it is written in the article?

Yup. Looks like it was vandalised on the 22 January. I've reverted it.WolfKeeper 15:50, 3 February 2006 (UTC)

[edit] Practical chemical investigation for NCEA Level 3 (New Zealand Education system) on Hydrogen Peroxide

I'm looking for adivce on a practical investigation in my chem class. I haven't been handed the assessment criteria yet, but when I do get it I will put it up here.

I know that it has to involve titrations on oxidation/reduction reactions and/or acid/base. Now, I'm thinking that Hydrogen Peroxide would be a good compound to investigate because it can be an acid or a base, a reductant or an oxidant.

Because this is at NCEA Level 3 (Bursary Level) I need my investigation to have a purpose, and that purpose must leave room (alot of room!) for disscusion, as thats where I'll be able to get an Excellence (highest grade) for my investigation.

I'm thinking of investigating the decomposition of low-concerntration Hydrogen Peroxide in different temperatures or some other variable. If theres anyone out there who can give me advice or recommendations about this please post something here, or email me at Monotrinity@hotmail.com. I'll need to record any help you give me for proof of authenticity, so I'd need a name and other details that you put in a biography if you do contribute.

Thanks a bunch! 210.55.230.121 20:29, 26 February 2006 (UTC)New Zealand Chemistry Student

How would you measure the concentration of a solution of hydrogen peroxide? There are many, many different ways, and plenty of room for discussion as to which is the best in a given situation. Physchim62 (talk) 23:36, 26 February 2006 (UTC)

I believe that the purpose is to involve a titration in your investigation (to find the concentration), but I could be wrong. This is in a classroom not a lab, and the school has limited resources, so more complex methods might be unavalible to me.

Thanks for responding! 210.55.230.121 20:22, 27 February 2006 (UTC) New Zealand Chemistry Student

[edit] History missing

Although this is very thorough for scientific/chemical purposes, I was looking for something of the behind the discovery and historical uses of hydrogen peroxide. That kind of information is completely missing. Did the alchemists have it? The Victorians? What were they using it for?

Corgi 18:49, 7 July 2006 (UTC)

I've added a brief history section. Itub 02:22, 8 July 2006 (UTC)

[edit] Anyone want to update based on Reuters Article?

US issues high-strength hydrogen peroxide warning Thu Jul 27, 2006 4:59pm ET253 WASHINGTON (Reuters) - Drinking or injecting high-strength hydrogen peroxide products sold online to treat serious diseases such as AIDS can be extremely harmful, U.S. health officials said on Thursday.

The "35 percent food grade hydrogen peroxide" products are highly corrosive and ingesting them could cause stomach irritation and ulcers, the Food and Drug Administration said.

Injecting the products intravenously could lead to blood vessel inflammation, bubbles in blood vessels and potentially life-threatening allergic reactions, the agency added.

The FDA said it had not approved 35 percent hydrogen peroxide for any use. The agency sent warnings to two Texas-based firms, DFWX and Frad 35 Inc., that it said were illegally selling 35 percent hydrogen peroxide products to treat AIDS, cancer, emphysema and other serious diseases.

"No one has presented any evidence that hydrogen peroxide taken internally has any medical value. In fact, consuming hydrogen peroxide in the manner touted by these Web sites could lead to tragic results," Dr. Steven Galson, director of the FDA's Center for Drug Evaluation and Research, said in a statement.

Donald Worden, owner of Frad 35 Inc., said he would continue selling his 35 percent hydrogen peroxide product. He said his Web site provided links to information about potential medical uses but that he was not promoting it for that purpose.

"There are references to what doctors and other publications have done. I make reference to that only to give ... people information that they want," Worden said in an interview.

He said the military, universities and independent laboratories were among his clients. He added that his product was "technical grade," which his Web site said could be used for treating waste water.

The strength of hydrogen peroxide solutions sold over-the-counter for disinfecting wounds is 3 percent.

Officials at DFWX were not immediately available for comment.

It would be helpful if someone could find an online reference to this article. Keeping it on this page is copyright violation, although I will let it rest for seven days for the purposes of discussion (which I interpret as being within U.S. fair use in this particular case) Physchim62 (talk) 13:29, 28 July 2006 (UTC)

Just searching for "peroxide" in google news: [1] . Itub 14:35, 28 July 2006 (UTC)

[edit] Use as an emetic - anyone?

I found this article while searching for information on H202 as an emetic for veterinary use; it is often recommended as a first line for accidental poisonings in dogs. Perhaps this would be a useful addition? [[2] --NinaRachel 21:21, 2 August 2006 (UTC)

Sure, why not? I've added a line about it to the article. --Itub 01:09, 3 August 2006 (UTC)

[edit] Safety/Hazards

Dear all, this article contains a section 'hazards'. I, and some editors with me, do believe that such sections are quite dangerous. The information can be added by anyone, and can therefore be wrong, moreover, it is a subset of all the data available in an MSDS. I believe that this is giving more than a risk, people may use the chemical, because the article does not say anything about it's toxicity when you drink it. Therefore one has to be very careful with this type of information.

Specifically for this section in this article, there are parts which do not belong in a hazard section, and all of the information is unreferenced.

For that reason the section was aed down to a minimum. I confess that thereby some info got lost, which I have tried to reinstate later in more appropriate places.

I propose to remove the hazard section, move some of the data to other parts of the document, and to put a small safety section back, which only tells the bare minimum (as e.g. in this version ). --Dirk Beetstra ^{T C} 22:48, 15 August 2006 (UTC)

The safety parts are, ironically, often the most hazardous parts of the WE-chem. Anyone, regardless of their chemical training, can add their favorite story or advice often little of the information in verifiable. For this reason, I migrated a substantial section of this article on anti-parasitics to the article on Parasitism where the information is in context and can be judged by more relevant experts, IMHO. If the report on steel discussed the hazards of driving (steel) cars, I would likewise recommend that the hazards be relocated to automobile. When, however, the hazard section describes the mechanism of the hazard (e.g. how H2O2 does its thing), then I would lean to leaving this in the article.--Smokefoot 23:06, 15 August 2006 (UTC)

I totally concur (it's the hand that holds the hammer that inflicts the pain when you mis the pin, not the steel). See hydrogen sulfide, safety-section vs. toxicity section. --Dirk Beetstra ^{T C} 23:12, 15 August 2006 (UTC)

"It's not the fall that kills, it's the abrupt deceleration at the end", "The most common cause of death is lack of oxygen to the brain" Physchim62 (talk) 14:59, 4 September 2006 (UTC)

Safety sections can be referenced, and there are a number of reputable sources available on-line. The most difficult part, in my experience, is making them readable! Acetic acid got to FA with its safety section, so this challenge is not impossible. Certainly we should be firm on insisting on verifiable, official references, as WP is not the place for rumour or anecdotes. Physchim62 (talk) 14:54, 4 September 2006 (UTC)

Although I do concur that it is possible to write it in a good way, I am still pondering if it is in conflict with WP:NOT (Wikipedia is not an indiscriminate collection of information, point 4, '...not include instruction - advice (legal, medical or otherwise), ..')? --Dirk Beetstra ^{T C} 16:34, 4 September 2006 (UTC)

I cannot agree, with this concept of intentionally limiting information. All forms of all information are potentially dangerous. Give me more info, not less. 69.87.194.77 00:03, 25 October 2006 (UTC)

69.87.194.77, info can be available on other mediawiki sources. For example, synthesis of some compounds are not discribed here, where they would not comply with wp:not, but on wikibooks, and the article contains a link to there. There is a question of liability here, so if you believe that such info should be on the mediawiki, surely this is not the place to address that, but probably on the talk-page of e.g. wp:not. --Dirk Beetstra ^{T C} 07:39, 25 October 2006 (UTC)

For compounds as common as hydrogen peroxide, there are sufficient official, peer-reviewed sources to cite. There is no reason to go beyond them. We are not in our role as an encyclopedia by encouraging speculation. Physchim62 (talk) 12:38, 30 October 2006 (UTC)

[edit] Use in contact lens cleaning solutions

Under "Domestic uses", is it worth mentioning that hydrogen peroxide is also used in some contact lens cleaning kits? For example, Oxysept, which is a 3% hydrogen peroxide solution; you put it in a little plastic vial along with your contacts and some tablets (consisting of sodium chloride and sodium phosphate, I think); there's also another brand which I'll check up on next time I'm at the pharmacy which uses some metal catalyst (not sure of the exact chemistry with that one). Obviously, once you're done with this process, you wash it off before putting contacts back in the eyes. Someone with more knowledge help me out here, thanks. =) cab 13:32, 4 September 2006 (UTC)

The hydrogen peroxide will probably be working as a mild antiseptic in this case: there are certainly metal catalysts which will speed up this role, and they are (sometimes) used in washing powders for similar reasons. Can you supply a website for Oxysept, or scan in the product composition? Physchim62 (talk) 14:57, 4 September 2006 (UTC)

[edit] Misspelling?

In the final sentence of the article, is that supposed to be "oxygen" instead of "oxegen"?Lestrade 14:01, 7 October 2006 (UTC)Lestrade

[edit] Peroxide Pics

I Have A Picture Of A Bottle And Of Fizzing On A Small Wound And In Contact With Other Items such as egg. Would These Be Ok To Put Up? Offensiveandconfusing 20:06, 10 October 2006 (UTC)

[edit] Removed Common Cold Cure

I removed this:

Another "alternative" use of hydrogen peroxide is to prevent the common cold. A cotton swab is dipped in 3% solution of hydrogen peroxide and then used to clean the ear canal. The theory is that the cold virus incubates in the ear canal before spreading to the rest of the mucous membranes. So killing the virus while it is still in the ear canal aims to prevent the cold altogether. ^[1]

The is just a broken link, and such an extraordinary claim as a cure for the common cold needs to be cited with atleast a reference thats not just a broken link, and probably needs a bit of a highers standard than that--i.e. a reference to a very credible source--considering the extraoridinary nature of the claim.Brentt 04:06, 18 October 2006 (UTC)

I am the one who included this blurb, though originally with a different, admittedly "not very good" reference. I stumbled across the claim while looking for something to prevent me from getting the 6 or 7 colds a year I get nowadays. Doing a google search returns a lot more of these kinds of claims. Here was the original that I found. According to this, "pharmaceutical grade" 3% concentration should not be used internally; only diluted "food grade" should be used. This mentions a study by Richard Simmons regarding colds entering the body via the ear canal, and German research treating colds and flu with hydrogen peroxide. This mentions the same thing. Anecdotally, after finding this information I tried the solution mentioned above when I felt a cold coming on, felt something "odd" in my throat where the colds normally originate, and the cold disappeared. So it seems there is something to this. What do you think is required to get this put back in the main article, as it seems like this would be very useful information for people to have? --greenmoss 11:32, 19 October 2006 (UTC)

[edit] vandalism

Someone has added this nonsense at the end of the main description: "Do not put it on your dick if you have a cut on it, it fuckin hurts!!" I can't seem to remove it. Can someone help? 80.104.143.235 05:48, 5 November 2006 (UTC)

I don't see this - I think it may be a cache problem - try refreshing your browser. It was spotted by one of our chemists and reverted after 6 minutes, you were just unlucky. Thanks for reporting it! Walkerma 06:52, 5 November 2006 (UTC)

[edit] Melting Point

I checked 1992 handbook of chemistry had melting point of hydrogen peroxide at -0.41 degrees celsius.

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