Potassium metavanadate, also known as potassium vanadate(V), is an inorganic compound with the chemical formula KVO3. It is a yellow to yellow-orange powder that is sparingly soluble in water. Potassium metavanadate is a vanadium(V) compound and contains vanadium in its highest oxidation state.

China is one of the major producers and exporters of potassium metavanadate. It is primarily used in various industrial applications, including:

1. Catalysts: Potassium metavanadate is used as a catalyst in the production of sulfuric acid and other chemical reactions.

2. Pigments: It is employed in the manufacturing of yellow pigments for ceramics, glass, and coatings.

3. Metallurgy: Potassium metavanadate finds application in the production of steel and other alloys, where it acts as a deoxidizing agent and helps improve the strength and corrosion resistance of the metals.

4. Ceramics: It is used as an additive in ceramic glazes to impart color and improve the durability of the final product.

5. Electronics: Potassium metavanadate is utilized in the production of electronic components and devices, such as cathode ray tubes and semiconductors.