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H2O2 stability? Is 30% hydrogen peroxide still good after 3 years?


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8 replies to this topic

#1 MKR

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Posted 12 February 2009 - 04:13 PM

H2O2 stability? Is 30% hydrogen peroxide still good after 3 years?

Is there a way for me to check?

#2 T C

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Posted 12 February 2009 - 08:29 PM

Well.....I am not sure about the stability...I would expect it to go bad as its a good oxidizing agent.

I remember estimating H2O2 by iodimetry wherein you use KI solution and oxidize it to I2 (color change can seen visually) and then estimating I2 by oxidizing thiosulfate ions to perthiosulfate. This is followed by a back calulation to find conc. of H2O2.

Check any standard chemistry book for details, its a very well known reaction to estimate H2O2 concentration.

Hope it helps.

TC

#3 little mouse

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Posted 13 February 2009 - 02:40 AM

If I were you, I would buy a new bottle.

#4 T C

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Posted 13 February 2009 - 04:52 AM

Yeah to think about it, I would do the same.....buy a new bottle :)

However, it did remind me of some fun experiments that we did during masters.....been ages that I have touched a burette or seen any colour change reaction working in my hand ;)

TC

#5 mdfenko

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Posted 13 February 2009 - 07:20 AM

the stability and usability also depend on your storage conditions and usage.

we store 30% h2o2 sealed tight, in the cold and have been able to use the same bottle for several years in peroxidase reactions for deposition of colored product (dab).

it also remained useful for dissolving polyacrylamide.

however, when in doubt, throw it out.
talent does what it can
genius does what it must
i do what i get paid to do

#6 scolix

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Posted 13 February 2009 - 08:59 AM

H2O2 stability? Is 30% hydrogen peroxide still good after 3 years?

Is there a way for me to check?


If you stored it properly, it should last. I dont know if there is way to check if its good or not.

#7 molgen

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Posted 15 February 2009 - 09:22 AM

I dont know if there is way to check if its good or not.


One drop on a healing wound will give you the answer.
If it fizzes Ė it's good.
Though, I donít know about the percentage.

#8 phage434

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Posted 15 February 2009 - 01:44 PM

30% hydrogen peroxide is caustic. The solution used for wounds is 3%. Don't try this at home with 30% peroxide!

#9 molgen

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Posted 16 February 2009 - 02:17 AM

30% hydrogen peroxide is caustic. The solution used for wounds is 3%. Don't try this at home with 30% peroxide!


It was meant as a jock.
DO NOT TRY IT AT HOME!!!!




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