Potassium metavanadate (KVO₃) is an inorganic compound, which is mainly used as a catalyst, mordant, analytical reagent, etc. It is a white crystalline powder that is easily soluble in water and has strong oxidizing and reducing properties, and is able to react with acids. Potassium metavanadate has a melting point of 520 °C and a density of 2.84 g/cm³.

1. Catalyst: used as an oxidant in chemical reactions, especially in organic synthesis, such as in the oxidation of alcohols.

2. Mordant: In the textile industry, potassium metavanadate can be used as a mordant to help the dye adhere better to the fiber.

3. Analytical reagents: In chemical analysis, potassium metavanadate can be used as a titration reagent for determining the content of certain substances.

4. Plating solution composition: In the electroplating process, potassium metavanadate can be used as one of the components of the electroplating solution to improve the quality and efficiency of electroplating.

5. Dechlorinator: In the process of water treatment, potassium metavanadate can be used as a dechlorinating agent to remove chlorine from water.

6. Glass and ceramic industry: In the production of glass and ceramics, potassium metavanadate can be used as an oxidizing agent and clarifier to help improve the transparency and quality of products.