I have been using potassium hydrogen phthalate (KHP) for creating primary standards. I have looked into the Flinn catalog, and the disposal consideration is classified as "organic acids, must be neutralized prior to drain disposal." That seems easy enough, but with recent publications of health concerns of phthalate exposure I just want to make sure. I have looked everywhere, and I can't find any additional information as to how this stuff can be disposed.
I know some of you use this in your labs. How do you dispose of it? I could reduce it down in solution or hire a company to take it away, but if it's safe to neutralize and empty into the sewers I'd rather save the time and money.
Thanks in advance for any help!