What Is Molybdenum Oxide?
Molybdenum oxide represents a class of transition metal oxides with different oxidation states, including molybdenum(IV) oxide, molybdenum(V) oxide, and molybdenum(VI) oxide, also known as molybdenum dioxide, molybdenum pentoxide, and molybdenum trioxide, respectively. Molybdenum trioxide is the most commonly produced form among these compounds.
Uses of Molybdenum Oxides
Molybdenum Oxide (VI)
Used in producing molybdenum metal, as an additive in alloys to enhance hardness and resistance to heat and corrosion, and in various applications including as a corrosion inhibitor, pesticide, ceramic glaze, chemical reagent, and oxidation catalyst.
Molybdenum Oxide (IV)
Applied as a lubricant, in surface treatment, and potentially in lithium-ion batteries due to its good electrical conductivity.
Properties of Molybdenum Oxides
Molybdenum Oxide (VI)
Characterized by its orthorhombic crystal structure, molybdenum oxide (VI) appears as a white to yellow or bright blue crystalline powder. It has a melting point of 795°C, a boiling point of 1,155°C, and is slightly soluble in water.
Molybdenum Oxide (IV)
This brownish-purple crystal, with a monoclinic and distorted rutile-type structure, melts at 1,100°C and showcases notable electrical conductivity.
Other Information on Molybdenum Oxides
Production Process
Molybdenum(VI) oxide can be industrially obtained by roasting molybdenum disulfide, while molybdenum(IV) oxide is produced by reducing molybdenum(VI) oxide at high temperatures in the presence of molybdenum metal.
Legal Information
Both oxides are regulated under various safety and environmental laws for their hazardous and toxic properties.
Handling and Storage Precautions
Due to potential carcinogenic and other health risks, appropriate protective measures should be taken when handling. For storage, molybdenum oxides should be kept in a cool, sun-protected area, and securely sealed.