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Converting sodium percarbonate to hydrogen peroxide

  1. Apr 8, 2017 #1
    I noticed a previous thread on the above subject in this forum.

    For several years now, I have used 30% concentration hydrogen peroxide mixed with a few drops of ammonia to very great effect* for dealing with blood stains on cotton fabrics (on sheets—a recurring problem for me) by soaking the stains for a minute or two in the above solution. With this new age of terrorism, it is unfortunately becoming increasingly difficult (and very expensive) to get hold of H2O2 (at least where I live in Belgium). My question: I have recently bought a bottle of Sodium Percarbonate powder which I think is 100% pure. What ratio of water to powder would be necessary to obtain a similar H2O2 concentration to the H2O2 concentration I have been using up until now? And, if you know the answer, is there a possibility that the presence of soda ash (present in sodium percarbonate) could compromise the efficacity of this proposed method in relation to my method up until now?

    Please note that I am an ignoramus regarding all things related to physics :frown: so answers will necessarily need to be formulated with this in mind.


    *and previously an even stronger concentration (50%? I can't remember) to even greater effect
    Last edited: Apr 8, 2017
  2. jcsd
  3. Apr 8, 2017 #2
    Hmm, I thought H2O2 is regularly available from hairdresser suppliers as a non corrosive bleaching agent, things may have changed though.
  4. Apr 8, 2017 #3


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    But not 30%
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