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Magnetite / Black Iron Oxide

Magnetite is an iron-oxide based mineral that contains equal amounts of iron(II) (FeO) and iron(III) (Fe₂O₃), with an empirical formula, Fe₃O₄, and it is often expressed as iron(II,III) oxide. Magnetite is a natural iron oxide magnet and the most magnetic of all the minerals on Earth. It is a black powder used extensively as a black pigment, Mars Black.
Detailed Particle Size Information

Standard low micron APS (d50) granulations are typically available at 10 microns, 18 microns, and 63 microns. Additional powder and granulation sizes are available.

Typical Physical Properties

Fe | 67.7
SiO₂ | 2.37
SiO₂+ Al₂O₃ | 3.38
CaO + MgO | 1.21
Na₂O + K₂O | 0.216
S | 0.32
P | 0.031

Typical Applications

Magnetite has many applications and uses in various industries. Magnetite is used in magnetic paint, pigments, ink, and fluids. It is a catalyst in the Haber process to produce fertilizers and as a micronutrient in fertilizers. It is used as an aggregate in high-density concrete. It is also used as an abrasive in waterjet cutting. Nanoparticles of Fe₃O₄ are used as contrast agents in MRI scanning, and IV preparations are used to treat anemia. Magnetite is also used in water and wastewater treatment.

Packaging Options

50 lb. bags, poly-lined fiber drums, bulk bags, and loose bulk


Magnetite TSCA (SARA Title III) Status: Listed. For further information, please call the EPA Office of Chemical Safety and Pollution Prevention (OCSPP) at 202-564-2902. Magnetite CAS Numbers: 1317-61-9; 1309-38-2 European Community Number: 215-169-8 (Listing) Military Specification Number: MIL-I-275B U.S. National Library of Medicine (NIH): Substance Listing.

Sustainable Qualities

Magnetite, also known as Black Iron Oxide Powder, is a sustainable material that contributes to a circular economy due to its unique properties and production process. It is derived from iron ore, an abundant and widely available natural mineral. The production process of Magnetite Powder involves simple, energy-efficient methods that minimize waste and emissions, making it a highly sustainable material.

Magnetite Powder has various applications, including as a pigment, magnetic material, and catalyst, making it a versatile and valuable material for many industries. Because it is produced from natural minerals and can be recycled or repurposed at the end of its useful life, Magnetite Powder is an excellent example of a sustainable material that contributes to a circular economy.

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