On it's own it's Xn rating, no idea what it would be with the copper.
Anyway Xn is enough that you want to read the MSDS.
<
http://www.hillbrothers.com/msds/pdf/n/ammonium-persulfate.pdf>
Which is not too bad, seems it's just barely Xn.
Once you add the copper, you are not supposed to flush it down the
drain anyway, so it doesn't really matter if AP could be disposed of
that way. Bring it to your local waste disposal facility, in most
places around the world household hazardous waste can be brought in
free of charge, to discourage people dumping it illegally.
ST
On Sun, Dec 6, 2009 at 3:54 PM, Anthony Shipman <als@...> wrote:
> 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.
>
>
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