Derived from the NIH UMLS (Unified Medical Language System) Ontology: ferumoxytol(C0060274) Definition (MSH) Iron (II,III) oxide (Fe3O4). It is a black ore of IRON that forms opaque crystals and exerts strong magnetism English Triiron Tetraoxide, Black Iron Oxide, Magnetic Black, Iron Black, FERUMOXYTOL NON-STOICHIOMETRIC MAGNETITE, FERUMOXYTOL, Ferumoxytol (substance), Ferumoxytol (product), ferumoxytol, Ferrosoferric Oxide [Chemical/Ingredient], Ferumoxytol Non-Stoichiometric Magnetite, FERROSOFERRIC OXIDE, ferrosoferric oxide, Ferrosoferric oxide, C.I. 77499, Iron (II, III) Oxide, Ferumoxytol