MSDS Sheet (PDF)

Technical Information (PDF)

Shelf Life Guidelines
















Dried Ferrous Sulfate Heptahydrate

General Information

The most commonly used form of Ferrous Sulfate is Dried Heptahydrate due to its’ consistent iron, sulfur, water and oxygen contents, goes into solution rapidly, is free-flowing, and can be shipped in 50 lb. bags, bulk bags, dump trucks, pneumatic trucks, rail hopper and rail box cars.

Although Dried Ferrous Sulfate Heptahydrate is free-flowing when processed and shipped by QC Corporation, 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° Fahrenheit or in extreme humid conditions. Upon request, and at no additional cost, QC Corporation adds up to 1% by weight of calcium carbonate which acts as an anti-caking agent to extend storage times of Dried Heptahydrate and help to prevent caking or compaction. The addition of calcium carbonate is not advised if Ferrous Sulfate is being pumped or sprayed in a liquid form due to the insolubility of calcium carbonate which can clog filters, pumps and spray nozzles.

Dried Heptahydrate Chart

Solu-Grade Heptahydrate

General Information

Diamond Brand® Dried Ferrous Sulfate Heptahydrate (FeSO4•7H2O) Solu-Grade® is derived from a co-product of the pickling of steel. Available only from our North Lima, OH plant, we segregate raw materials from a select group of steel pickling operations to assure the purest, lowest insoluble content, and brightest blue/green color for our Solu-Grade product. This makes Solu-Grade® the obvious choice for applications such as liquid fertilizers where clarity of solution and low insolubles are required. The Agricultural, Lawn and Garden, and Turf Management industries use Diamond Brand® Ferrous Sulfate to correct iron chlorosis or deficiencies in plants and soils, to eliminate moss, to reduce alkalinity, and as a trace element or micronutrient in fertilizers. In addition, it is used in the diets of swine, poultry and other animals as a feed supplement, to prevent anemia caused by iron deficiencies. Diamond Brand® Ferrous Sulfate products are used as a reducing agent in the treatment of hazardous wastes and as a coagulant and flocculent in the treatment of sewage waste, industrial effluents, raw drinking water and other wastewater sources. In addition, it is used as a reducing agent in the removal of phosphates and odor causing hydrogen sulfide from various waste sources.