Thorium oxide (ThO2)(CAS: 1314-20-1)

Thorium oxide, ThO2, is a white or yellowish-white solid with a high melting point of 2750°C. It has a cubic crystal structure and a molecular weight of approximately 279.1 g/mol. Thorium oxide is insoluble in water but soluble in acids. It is chemically stable but can react with strong acids to form thorium salts.

Thorium oxide can be synthesized by reducing thorium nitrate or thorium(IV) oxide with a reducing agent like hydrogen at high temperatures. Another method involves the calcination of thorium(IV) hydroxide in an inert atmosphere. These processes yield high-purity thorium oxide with good selectivity and yield.

Thorium oxide is used in various industries. It is a key component in ceramic and glass manufacturing for its high refractive index and opacity. It is also used in the production of optical lenses, high-temperature crucibles, and in the aerospace industry for its thermal stability. Additionally, it is utilized in the nuclear industry for certain reactor components and in phosphors for cathode ray tubes.

Handling thorium oxide requires caution due to its radioactivity. Use appropriate personal protective equipment (PPE), including gloves, goggles, and a lab coat. Work in a fume hood to minimize inhalation risks. Ensure good ventilation and store the compound in a secure, labeled container. Refer to the Safety Data Sheet (SDS) for specific safety guidelines and emergency procedures.