There is only one type of Mag Sil effective for pesticides, PR Grade…which means activated at 675C. If it is not activated at that temp it is NOT pesticide residue grade. There is one other high temp Mg-Si, A grade activated at 650c. The EPA pesticide method we refer to, 3620C, specifically states A Grade is not appropriate for pesticide clean up.
There’s another name for mag Sil cooked at lower temp, Talc Powder(also Talcum). Don’t get fooled into believing anything else regarding MagSilPR