Ammonium dimolybdate is a white powdered crystalline inorganic compound with the chemical formula (NH4)2Mo2O7. It is easily soluble in alkali and water, but not easily soluble in alcohol and acetone. Ammonium dimolybdate decomposes at high temperatures and can be used to prepare other molybdenum compounds. This compound has a certain toxicity, so special attention needs to be paid to safety when exposed to it.

The main uses of ammonium dimolybdate include as a catalyst (for oxidation reactions, cyanidation reactions, etc.), a dye (for dyeing fibers and wood), and as a gunpowder component (to enhance combustion performance). In addition, it is also widely used in the preparation of metal molybdenum, pigments, metal surface treatment, corrosion inhibitors, trace element fertilizers and other fields. In the petroleum refining industry, ammonium dimolybdate is used in the production of catalysts for hydrogenation, desulfurization and fertilizer catalysts.

1. Catalyst: Ammonium dimolybdate is used as a catalyst for a variety of chemical reactions, especially in oxidation and cyanidation reactions. In the petroleum refining industry, it is used to produce catalysts for hydrogenation and desulfurization, as well as fertilizer catalysts.

2. Dyes: In the dye industry, ammonium dimolybdate is used to dye fibers and wood, providing a unique color effect.

3. Gunpowder Composition: It can be used as an ingredient in gunpowder to enhance combustion performance.

4. Preparation of molybdenum metal: Ammonium dimolybdate is used to produce molybdenum metal, which has a wide range of applications in high temperature and corrosive environments.

5. Pigments: It is also used as a component of pigments, especially in situations where high temperature or chemical resistance is required.

6. Metal surface treatment: In metal processing, ammonium dimolybdate is used in the treatment of metal surfaces to provide corrosion protection or other special effects.

7. Corrosion inhibitor: It can be used as a corrosion inhibitor to slow down the corrosion process of metals.

8. Trace element fertilizer: In agriculture, ammonium dimolybdate is used as a trace element fertilizer to provide molybdenum required for plant growth.