Hi everybody. I'm an electronics hobbyist and use Ferric chloride to etch copper circuit boards. I'm left with a solution of copper chloride (or is it cupric chloride? Chemistry isn't my forte). So my question is, how do I dispose of it? I already searched around on the internet and there was no clear answer except "contact the authorities", but I can't do that here because I live in a third world dump and the authorities are not to be trusted with waste disposal. I have to do everything myself, if possible. I know some people who etch boards like this in large scale (a thousand boards a month or so) and these guys just throw the stuff wherever they can. One of them recently contacted me about disposal because he was worried about any damage he may be doing, which prompted my search.