Diamond Brand® Ferrous Sulfate Monohydrate (FeSO₄•H₂O) contains the greatest amount of Iron per ton (Fe ~30%) when compared to other forms of Ferrous Sulfate and the least amount of interior water (one molecule or ~15% by weight). Ferrous Sulfate is derived from the processing of ilmenite ore in the manufacture of the paint pigment Titanium Dioxide, or as a co-product from the pickling of steel. At QC Corporation, we evaporate all exterior moisture from each crystal, and remove 6 of the 7 molecules of interior moisture, via rotary dryers, to produce a free-flowing Ferrous Sulfate Monohydrate. Diamond Brand® Ferrous Sulfate Monohydrate is produced in either powder form (Standard), or is compacted and screened for uniformity at our Cape Girardeau, MO facility into coarse or fine granular forms.