Diamond Brand®
Ferrous (Iron) Sulfate

What are the Different Types of Diamond Brand Ferrous Sulfate Products?

Verdesian offers five different Diamond Brand product offerings:

• Moist Ferrous Sulfate Heptahydrate (Fe-18%)
• Dried Ferrous Sulfate Heptahydrate (Fe-20%)
• Dried Solu-Grade® Heptahydrate (Fe-20%)
• Dried Ferrous Sulfate Monohydrate (Fe-30%)
• Dried Ferrous Sulfate Coarse and Fine Granular Monohydrate (Fe-30%)

Keep reading to find which ferrous sulfate product would best suit your needs.

Dried Ferrous Sulfate Heptahydrate (Fe-20%)

The most commonly used form of ferrous sulfate is Dried Heptahydrate, due to its consistent iron, sulfur, water and oxygen contents, its free-flowing characteristics, and its ability to go into solution rapidly. It can be shipped in 50 lb. bags or bulk bags.

Although our Diamond Brand Dried Ferrous Sulfate Heptahydrate is free-flowing when processed, this material has a tendency to compact and/or cake (becomes hard) under various shipping and storage conditions. These hardness problems occur due to the instability of the sixth and seventh molecules of interior water (H2O), which have a tendency of releasing from each heptahydrate crystal when stored in temperatures in excess of 75° F, or in extreme humid conditions. Upon request, and at no additional cost, Verdesian can add an anti-caking agent to extend storage times of dried heptahydrate and help to prevent caking or compaction.

Sold in 50 Lb. bags or 2,000 Lb. bulk bags

SDS | Sell Sheet | Shelf Guidelines

Dried Ferrous Sulfate Monohydrate (Fe-30%)

Ferrous Sulfate Monohydrate contains the greatest amount of Iron per ton (Fe-30%) and the least amount of interior water (one molecule or ~12% by weight). At Verdesian, ferrous sulfate Monohydrate is made in three sizes:

1. Standard or powdered size (US Sieve Mesh Size -20 +100)
2. Fine Granular (US Sieve Mesh Size of -16 +24)
3. Coarse Granular (US Sieve Mesh Size of -6 +16)

All three sizes will not compact or cake in transit or in storage as long as it is not exposed to free water or temperatures in excess of 325° F. In addition, the higher iron content of Monohydrate results in lower transportation, bagging and palletizing costs per pound of iron by as much as 33% when compared to the same costs per pound of iron contained in moist and dried ferrous sulfate Heptahydrate. The primary disadvantage of dried ferrous sulfate Monohydrate is its slower rate of solubility due to its higher iron content.

Sold in 50 Lb. bags or 2,000 Lb. bulk bags

SDS | Sell Sheet

Are Diamond Brand Ferrous Sulfate Products OMRI Listed?

Verdesian’s Diamond Brand Ferrous Sulfate products are now OMRI listed and allowed with restrictions. Our iron sulfate products may be used as a plant or soil amendment if soil deficiency is documented by testing. Please see the ORMI website for additional information regarding our Diamond Brand OMRI listing.

The Diamond Brand® Ferrous (Iron) Sulfate product was previously owned by the QC Corporation, which was acquired in 2014 and changed its name to Verdesian Life Sciences in 2016.

For information or orders, contact Bob Bundschuh.

Our Drying Process

Moist Ferrous Sulfate is processed by our automated manufacturing system, which includes drying, screening and packaging. Moist Heptahydrate crystals are dried using gas fired rotary kilns. As heated air is drawn through the crystals, exterior water evaporates, leaving a Dried free-flowing Heptahydrate that is screened for uniformity. Further drying the Heptahydrate at higher temperatures will produce a free-flowing Dried Ferrous Sulfate Monohydrate product that is also screened for uniformity. With two independent ferrous sulfate drying production facilities located in Cape Girardeau, MO and in North Lima, Ohio, Verdesian has the largest Ferrous Sulfate drying capacity in North America.