I'm just being quiet! :bounce1::bounce2::bounce3:
I need dow flake (CaCl2), mag flake, and I am definitely interested in a source for FE2O3. If the MgSO4 is less expensive than what I'm buying now, I'd go for that too. I just want to be sure it is high enough grade. I can't remember the grading system now - I think reagent grade might be the highest, I think U.S.P is right up there near the top but as long as what we are getting is food grade or above (I know, who would eat this this stuff?) then I'm in. I think some of the swimming pool and road de-icer stuff is allowed to have more impurities, so I'll pass on that.