Ammonium tetramolybdate hydrate is widely used in the production of molybdenum metal and molybdenum-based alloys, which are essential in high-strength and high-temperature applications such as aerospace components and industrial machinery. It serves as a precursor in the synthesis of molybdenum catalysts, which are employed in petroleum refining and chemical processes like hydrodesulfurization to remove sulfur from fuels. Additionally, it is utilized in the manufacturing of corrosion-resistant coatings and pigments for ceramics and glass, enhancing their durability and aesthetic properties. In agriculture, it acts as a source of molybdenum in fertilizers to address soil deficiencies and promote healthy plant growth. Its role in analytical chemistry includes being a reagent for the detection and quantification of phosphates and silicates in various samples.