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Subject: Re: [Homebrew_PCBs] Re: Muriatic acid + drug store hydrogen peroxide

From: Stefan Trethan <stefan_trethan@...>
Date: 2010-02-14

What is also likely is that you might attract the wrong kind of
attention by buying those three chemicals together.


ST

On Sun, Feb 14, 2010 at 4:12 PM, <toddroberts2001@...> wrote:
> Hi All,
> I don't know if this has been covered before but in using the  chemicals
> Muriatic Acid (hydrochloric acid) and Hydrogen Peroxide to etch
> circuit boards with - if someone accidentally spilled some  acetone
> into the etchant mix they could inadvertently produce a high  explosive
> called Acetone Peroxide. Some people use Acetone to clean the copper
> boards with prior to etching so it is possible the chemicals could be
> accidentally mixed together. I believe the reaction produces white
> crystals that are the highly unstable explosive Acetone Peroxide.
>
> There is no such danger when using ferric chloride. Just a reminder  to
> be careful when using these chemicals.
>
> Todd R
>
>