Overview
Iron(II) oxide, commonly known as ferrous oxide, is an inorganic compound with the chemical formula FeO. It is one of the iron oxides and appears as a black crystalline powder. Unlike iron(III) oxide (Fe₂O₃), which is more common, iron(II) oxide is less stable and tends to oxidize further under normal conditions. Iron(II) oxide is primarily produced through the reduction of iron(III) oxide with carbon monoxide or hydrogen at high temperatures. It is non-stoichiometric, meaning its composition can vary slightly from the ideal FeO formula. This compound plays a significant role in metallurgy and chemical industries.
Physical and Chemical Properties
Iron(II) oxide is a black, paramagnetic solid with a density of 5.7 g/cm³. It has a melting point of 1,377°C and a boiling point of 3,414°C, making it suitable for high-temperature applications. The compound is insoluble in water but dissolves in acids, forming ferrous salts. One notable characteristic of iron(II) oxide is its non-stoichiometric nature, often represented as FeₓO, where x is slightly less than 1. This deviation arises from defects in the crystal lattice. The compound is also a semiconductor and exhibits interesting magnetic properties due to its unpaired electrons.
Main Applications
The primary use of iron(II) oxide is in the steel industry, where it serves as a raw material for producing iron and steel. It is also employed as a pigment in ceramics and glasses, imparting a green or black color. Additionally, FeO acts as a reducing agent in various chemical processes. In the field of nanotechnology, iron(II) oxide nanoparticles are studied for their potential applications in magnetic storage devices and biomedical imaging. The compound is also used in the manufacture of electrodes and as a catalyst in certain industrial reactions.
Safety and Storage
Iron(II) oxide is generally considered low in toxicity, but precautions should still be taken to avoid inhalation or skin contact. Prolonged exposure to dust may cause respiratory irritation. Proper personal protective equipment, such as gloves and masks, should be worn when handling the compound. Storage conditions are critical to maintaining the stability of iron(II) oxide. It should be kept in a cool, dry place, away from oxidizing agents and moisture. Containers must be tightly sealed to prevent oxidation to iron(III) oxide, which can alter its properties and usability.
B2B Procurement Guide
When procuring iron(II) oxide, buyers should prioritize purity and particle size, as these factors significantly impact performance in industrial applications. Technical specifications should be clearly outlined in supplier agreements to ensure consistency. Bulk purchases often come with cost advantages, but storage capacity and shelf life must be considered. It is advisable to source from reputable suppliers who provide certificates of analysis (CoA) to verify product quality. Buyers should also inquire about packaging options to minimize oxidation during transit and storage.
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