Do you KNOW that was the source?
Of course not. It is just one measurable factor that the doctor observed. Andy was part of a blind study that a doctor specializing the the treatment of autism was conducting. As part of the study, he was subjected to numerous tests that normal children never undergo. I know that his mother is convinced that mercury had something to do with the problem because of the sudden onset. In any case, the doctor's several treatments did not help this case and Andy no longer sees her. His numerous educational therapies have not helped much either.
Regarding the "powdered mercury": I don't know what compound it was. I'll have to ask my husband. I was more concerned on the legality of possessing it and the fines I might have to pay, or licenses I would have to purchase, if it were discovered. I was told that it was illegal for me to have and that I needed to get rid of it. I remember asking my husband why it wasn't silver and liquid, but I don't remember his answer.
All I know is that I am lucky to get rid of it for only $50. I had much higher quotes from Haz Mat disposal companies. I have no idea why it was in our lab in the first place! A former employee found it, reported it, and I was always worried that he might report me for having it after he left the company.