I have a few 5 gallon buckets of copper sulfate, which was created by adding sulfuric acid to copper nitrate. The copper nitrate was a result of 50/50 nitric and distilled water boils to dissolve base metals from gold filled material. I added the sulfuric acid in order to reuse the nitric. Could this copper sulfate be of any use to anyone? Pickup would be in or near the northern virgina area.