Can you buy barium sulfate over the counter?

Barium sulfate is a chemical compound that is commonly used in a variety of applications, including as a radiopaque agent in medical imaging and as a pigment in paints and plastics. However, whether it can be purchased over the counter largely depends on the intended use and local regulations.

1. Medical Use: 
For medical purposes, barium sulfate is typically available only through prescription or directly from healthcare providers to ensure proper use and to monitor potential side effects. It's commonly used in procedures like barium swallows or enemas for diagnostic imaging.

2. Industrial Use: 
If you're looking to buy barium sulfate for industrial or laboratory use, it may be available from chemical suppliers, laboratory supply companies, or specialty distributors. In these cases, you might need to provide information about how you intend to use the compound.

3. Regulatory Considerations: 
Depending on your location, there may be regulations governing the sale of chemicals like barium sulfate. In some places, it may be available without restriction, while in others, there may be specific guidelines to follow.

4. Consumer Products: 
Some consumer products, such as certain types of paints or coatings, may contain barium sulfate but would not list it explicitly as an ingredient. In these cases, you'd be purchasing a finished product rather than the raw chemical itself.

If you are considering purchasing barium sulfate, it's important to clearly understand your intended use and comply with any local regulations or requirements.