Aluminium Fluoride Powder AlF3, CAS No. 7784-18-1

Aluminum Fluoride (AlF₃) is an inorganic compound that is commonly found as a white crystalline powder. It plays a crucial role in various industrial processes, particularly in aluminum production and glass manufacturing.

Specifications

Properties:

• Chemical Formula: AlF₃
• Appearance: White or colorless crystalline powder
• Melting Point: 1,290°C
• Boiling Point: Sublimes at around 1,275°C
• Density: 2.88 g/cm³
• Solubility: Slightly soluble in water and insoluble in most organic solvents
• Thermal Stability: Highly stable, can withstand high temperatures

Applications:

1. Aluminum Production:

   • AlF₃ is primarily used in the production of aluminum by the Hall-Héroult process. It acts as a flux, lowering the melting point of alumina (Al₂O₃) and improving the efficiency of the electrolytic reduction of aluminum.

2. Glass and Ceramics:

   • In the glass industry, AlF₃ is used to decrease the refractive index of glass, particularly in the production of specialty glasses like low-melting point glasses. It is also used in ceramics to improve the appearance and texture of products.

3. Catalyst in Chemical Reactions:

   • Aluminum Fluoride is sometimes employed as a catalyst in certain organic reactions, especially in the production of fluorocarbons.

4. Refractory Coatings:

   • Due to its high thermal stability, AlF₃ is used as a coating material to protect surfaces from extreme temperatures and chemical corrosion in applications such as furnace linings.

5. Optical Materials:

   • It is also used in optical applications, particularly in the production of infrared optics and antireflective coatings due to its low refractive index and transparency to infrared light.

Handling and Safety:

• Toxicity: Aluminum Fluoride is relatively low in toxicity, but inhalation of the powder can cause respiratory irritation. Prolonged exposure may lead to more serious health effects such as lung issues.
• PPE: It is advisable to wear personal protective equipment (PPE) such as gloves, goggles, and masks when handling the powder, especially in industrial settings where exposure to large quantities is possible.