Which of the following statements is correct regarding barium sulfate?

Barium sulfate is primarily utilized in medical imaging, particularly for gastrointestinal studies. This compound has a high atomic number, making it an excellent contrast agent for X-rays and computed tomography (CT) scans. When ingested or introduced into the gastrointestinal tract, barium sulfate outlines the organ's structure, allowing for detailed visualization of conditions or abnormalities in the digestive system.

The other statements are inaccurate in relation to the properties and uses of barium sulfate. It does not dissolve completely in water, which is why it is effective as a contrast agent; its insolubility provides the necessary density for imaging. Additionally, it is not transparent to X-rays; rather, it appears radiopaque, meaning it blocks X-ray beams and allows for contrast against surrounding tissues. Lastly, barium sulfate is classified as a solid, not a gas, as it is a dense powder used in its solid form during imaging procedures.