Re: CS>Adding peroxide to CS
From: Paul Holloway
Date: Thu, 19 Aug 2004 01:19:18
http://escribe.com/health/thesilverlist/m72654.html
> Peroxide you buy at the drug store or Walmart usually contains
> phenacetin as a stabilizer.
> Some people like to avoid phenacetin, as it is toxic, though the
> small quantities in peroxide may not cause a problem.
> It was used as a painkiller, but was taken off the market due to
> toxicity. If this concerns you, you can buy food grade peroxide at
> some health food stores, or online.
> Paul H
Dear Paul,
Thank you very much for posting this information! I checked the
toxicity, but it is at such a low concentration (< 0.05%) that it
should have little effect:
http://www.uiowa.edu/~chemsafe/MSDS/HydrogenPeroxide.htm
The reason I am so pleased with your post is you have explained a
nagging problem I was having with adding H2O2 to cs. Normally, I use
about 1/2 teaspoon per litre, which is about 40 parts per billion of
H2O2.
Here are the calculations:
1/2 tsp H2O2 = 1.23 milliliters
But, H2O2 used is 3% concentration, so the actual amount of H2O2 is
1.23 milliliters * 0.03 = 0.0369 milliliters H2O2
Now, 1 ppm = 1 milliliter per litre
So 0.0369 milliliters = 0.0369 ppm, or ~40 parts per billion
The problem is the amount of silver oxide in typical cs may be 5 to
10 percent of the total. So if you have 20ppm ionic, you may have 1
to 2 ppm of oxides.
However, the 40 ppb H2O2 can clear up a yellow solution overnight,
and keep it clear. This means the H2O2 acts as a catalyst, and is
not consumed in the reaction.
My problem is what keeps the H2O2 from disassociating? And you
supplied the answer: phenacetin!
Thanks Very Much!
Best Wishes,
Mike Monett
--
The Silver List is a moderated forum for discussing Colloidal Silver.
Instructions for unsubscribing are posted at: http://silverlist.org
To post, address your message to: [email protected]
Silver List archive: http://escribe.com/health/thesilverlist/index.html
Address Off-Topic messages to: [email protected]
OT Archive: http://escribe.com/health/silverofftopiclist/index.html
List maintainer: Mike Devour <[email protected]>
