[pure-silver] Re: Citric Acid as stop bath
- From: Gerald Koch <gerald.koch@xxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Thu, 14 Oct 2010 07:17:34 -0700 (PDT)
Phenol is not that toxic. Undiluted it can cause burns but for many years it
was the only antibacterial available and was added to many products. It is
still used to preserve various injectables such as insulin and certain vaccines.
A few drops added to stop bath will not be harmful.
Jerry
________________________________
From: Jean-David Beyer <jeandavid8@xxxxxxxxxxx>
To: pure-silver@xxxxxxxxxxxxx
Sent: Wed, October 13, 2010 3:24:33 PM
Subject: [pure-silver] Re: Citric Acid as stop bath
Gerald Koch wrote:
> This is a problem with citric acid and is the reason that many people
> use it as a one shot. You can add a snall crystal of thymol to the
> solution. See if there is a compounding pharmacy in your area which
> might be able to sell you a small amount. Your stop bath will smell
> like Listerine. If you can't obtain thymol then add a drop or two of
> phenol.
I would hesitate to use phenol in a stop bath. While it is a mild acid,
I would think it too toxic for casual use.
> You can also try adding a gram of sodium or potassium bisulfite
> which is used to sterilize wine bottles.
>
> You could switch to a boric acid stop bath which also has no smell. Use
> 30 g/l as a working solution. Use crystalline boric acid rather than
> the powder.
>
> Jerry
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