Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

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


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