Used as a catalyst in sulfuric acid production, particularly in the contact process where it facilitates the oxidation of sulfur dioxide to sulfur trioxide. Also employed in electrochemical applications, such as vanadium redox flow batteries, where it serves as a precursor for electrolyte solutions due to its stable vanadium(IV) state. Its hydrate form supports solubility in aqueous systems, making it suitable for liquid-phase reactions and industrial processes requiring homogeneous catalysis. Additionally, it finds use in research for synthesizing other vanadium-based compounds and materials with specific oxidation states.