Used as an iron supplement in medical and nutritional applications, particularly for treating iron deficiency anemia. It is also employed in cell culture media as a source of iron for microbial and mammalian cell growth. Commonly found in dialysis solutions to maintain iron levels in patients with chronic kidney disease. Additionally, it serves as a catalyst or reagent in certain organic synthesis processes and is used in water treatment to control phosphate levels by forming insoluble iron phosphate compounds.