Barium selenate is an inorganic compound with the chemical formula  BaSeO₄. It is a white solid that usually exists in anhydrous or aqueous form. Barium selenate is a substance that is poorly soluble in water, but it can be dissolved in an acidic environment.

1. Oxidizing agent: Barium selenate can act as an oxidizing agent in some chemical reactions, promoting the oxidation of other substances.

2. Analytical reagents: Used in certain tests and analytical methods in analytical chemistry.

3. Laboratory research: In chemical laboratories, barium selenate can be used for research and experimental purposes.

4. Pharmaceutical industry: Barium selenate is used as an ingredient in some medicines, such as as a contrast agent in X-rays, to help doctors see the patient's internal organs more clearly.

5. Agriculture: Barium selenate can be used as a selenium supplement in agricultural soils to provide the selenium needed by plants to help plant growth and health.

6. Special ceramic materials: Barium selenate can also be used to make some special ceramic materials for electronic and optical applications.