Making rust for thermite.
I can not seem to find any pure iron oxide for sale in my area; however I did find a product which contains iron oxide which I was going to try extracting. I found a website that lists all the ingredients of the product. http://agr.wa.gov/pestFert/Fertilizers/FertDB/prodinfo.asp?pname=4486
there is 2 parts per million of arsenic and 1 of mercury. I know this is very small but should I be worried about any negative side affects if I handle this stuff to much?