Homebrew PCBs

Smilingcat,

I added a small amount of baking soda to the ferric chloride so it would not
bubble over the container. Then came back in a few hours and repeated it.
The stuff is slowly turning into a solid. I will label it and take to a
toxic waste collection point. 

I have been shaking as much of the ferric chloride off of the board as I can
and then rinsing it with the garden hose away from the copper water pipe.
Hopefully that won't poison the ground too much. It is all crushed rock
around that area so don't want anything growing there anyway. I don't see
any stains on the rock.

Rick

-----Original Message-----
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of smilingcat90254
Sent: Friday, November 23, 2012 12:55 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] Re: Ratio of Ferric Chloride to copper?

As a rule of thumb, transition metal salt such as copper chloride are very
toxic. DO NOT pour it down the drain. Neutralize it first with sodium
carbonate. Excess HCl reacts with carbonate to form table salt, water and
CO2. But the toxic copper chloride is still there.

Evaporate out the water to get copper chloride salt then when you have
enough, take it to haz-mat recycling. California hazardous roundup was
pretty good. take any "household" toxic material no questions asked. Label
it clearly so they know what they got :) The people collecting most likely
have no clue when you hand over copper chloride solution. They'll just thank
you and take it from your hand. and be sure to add mixture of spent
containers like herbicide container (round up), used car oil, old paint,
paint thinners... 

And be very safe with the stuff. Just because you can make it at home so
easily doesn't mean its not that toxic.

smilingcat