Homebrew PCBs

I am planning to follow one of recipes for making copper etchant from hydrochloric acid,and was wondering how I should dispose of the used etchant?  I know that there are methods for refreshing the etchant for reuse, but I am still at the process debugging stage and storing the used etchant for long periods is not feasible.  The formula I was going to use is the one posted in this groups Files directory.

"Jachin" <jachin.s@...> writes:
> storing the used etchant for long periods is not feasible.

How long is "long periods" ?  Mine's been sitting on my workbench for
two years now, and I have some used FeCl that I got years before that.

I would not want the stuff to be around for more than a week.  I am working in borrowed lab space, and  I don't want to take up too much space.  That being said I am only making boards that are 2x2, and it might take a while to accrue significant(< .5 liter ) amounts of the leftover etchant.  Do you have plans to replenish the used FeCL?

--- In Homebrew_PCBs@yahoogroups.com, DJ Delorie <dj@...> wrote:

>
> 
> "Jachin" <jachin.s@...> writes:
> > storing the used etchant for long periods is not feasible.
> 
> How long is "long periods" ?  Mine's been sitting on my workbench for
> two years now, and I have some used FeCl that I got years before that.
>

--- In Homebrew_PCBs@yahoogroups.com, "Jachin" <jachin.s@...> wrote:
>
> 
> I would not want the stuff to be around for more than a week.  I am working in borrowed lab space, and  I don't want to take up too much space.  That being said I am only making boards that are 2x2, and it might take a while to accrue significant(< .5 liter ) amounts of the leftover etchant.  Do you have plans to replenish the used FeCL?
> 
> --- In Homebrew_PCBs@yahoogroups.com, DJ Delorie <dj@> wrote:
> >
> > 
> > "Jachin" <jachin.s@> writes:
> > > storing the used etchant for long periods is not feasible.
> > 
> > How long is "long periods" ?  Mine's been sitting on my workbench for
> > two years now, and I have some used FeCl that I got years before that.
> >
>


FeCl keeps for a long time.

You can add some Baking Soda leave it open til it dries up then seal it up in something and throw it away.  You are talking about a very small amount.