Homebrew PCBs

On Sun, 6 Dec 2009 06:45:22 am designer_craig wrote:
> I am not sure if you mean Ammonium Peroxide or Ammonium Persulfate but I
> had some quantity of the latter sitting around for 15 years and it all went
> bad and would not etch anything when I tried to etch a board.  Not sure
> what it decomposed to but I suspect it reverted to Ammonium Sulphate.
>
> Craig

BTW how toxic is this stuff (Ammonium Persulfate). The container had no 
warnings on it. I have some etchant with dissolved copper in it. Is it 
poisonous? What is the best way to dispose of it?

-- 
Anthony Shipman                    Mamas don't let your babies 
als@...                   grow up to be outsourced.