1. Is barium sulfate toxic?
Although soluble barium salts are toxic, barium sulfate itself is insoluble, meaning it does not dissolve in water or human body fluids. This is why it is considered safe for industrial use and even for medical imaging as a contrast agent.

2. Why can BaSO₄ be used in medical X-ray imaging?
Its high density absorbs X-rays effectively, allowing doctors to visualize the digestive system. Since it remains insoluble and does not enter the bloodstream, it is excreted naturally after the examination.

3. Is industrial-grade barium sulfate safe?
Industrial-grade BaSO₄ is safe when handled properly. It does not release harmful gases and does not react with other substances under normal temperatures. Standard protective equipment—such as masks and gloves—is recommended to avoid inhaling dust.

4. Are there environmental concerns?
Barium sulfate is environmentally stable and does not dissolve into groundwater. It is commonly used in coatings, plastics, and rubber without creating long-term contamination issues.

5. Why do manufacturers prefer barium sulfate over other fillers?
It provides high density, brightness, chemical resistance, and good UV stability. These properties improve the durability of coatings, the dimensional stability of plastics, and the wear resistance of rubber products.