Phosphomolybdic acid hydrate is widely used as a catalyst in various organic synthesis reactions, particularly in oxidation processes. It plays a significant role in the production of fine chemicals and pharmaceuticals due to its ability to facilitate efficient and selective transformations. In analytical chemistry, it is employed as a reagent for the detection and quantification of reducing substances, such as sugars and phenols, through colorimetric methods. Additionally, it is utilized in the preparation of heteropolyacid-based materials, which are applied in energy storage devices and electrochemical sensors. Its versatility also extends to the field of materials science, where it is used in the development of coatings and corrosion inhibitors.