What is barium sulfate used for?

Barium sulfate (BaSO4) is used in a variety of applications, including:

1. Medical Imaging: 
It is widely used as a contrast agent for X-ray imaging and CT scans of the gastrointestinal tract. It helps to enhance the visibility of the organs and structures in the digestive system during imaging procedures.

2. Industrial Applications: 
Barium sulfate is utilized as a pigment and filler in various products, including:
   - Plastics: Improves durability and opacity.
   - Paints and Coatings: Acts as a white pigment and filler.
   - Rubber Products: Enhances strength and resistance.

3. Oil and Gas Industry: 
It is used in drilling fluids to increase the density of the fluid and help in the stabilization of boreholes.

4. Paper Manufacturing: 
Acts as a filler to improve brightness and opacity in paper products.

5. Cosmetics: 
It is used in some cosmetic products for its opacifying properties.

6. Ceramics and Glassmaking: 
Barium sulfate is sometimes added to ceramics to improve the mechanical properties and in glassmaking for clarity and brightness.

These properties make barium sulfate a versatile compound across multiple industries.