Jackson's Mineral Salts #4 Ferrum Phosphate 6X - According to Dr. Schuessler and other homeopathic references, Ferrum phosphoricum (Ferr phos) is an important mineral salt related to carrying oxygen in the blood. Anemia, congestions, the starts of inflammations and fevers, muscular sprains, and strains are all related to an imbalance of this salt in the body.