Ammonium octamolybdate is an inorganic compound with the chemical formula H16Mo2N4O8. It is a white powder, mainly used as a smoke suppressant in plastics and polyester, and is often used in conjunction with other flame retardant smoke suppressants. Ammonium octamolybdate has some hygroscopicity and is soluble in water.

Ammonium octamolybdate is often used as a catalyst, especially in organic synthesis. In addition, it is also used in industrial fields such as metal surface treatment, desulfurization, catalytic oxidation, etc.

1. Smoke suppressant: In the plastics and polyester industries, ammonium octamolybdate is used as a smoke suppressant to help reduce smoke from combustion.

2. Catalyst: Ammonium octamolybdate is often used as a catalyst in chemical laboratories and industrial production, especially in organic synthesis reactions.

3. Metal surface treatment: Ammonium octamolybdate is used for the treatment of metal surfaces to improve its corrosion resistance and other properties.

4. Desulfurization: In industrial processes, ammonium octamolybdate is used in desulfurization reactions to help reduce sulfur emissions.

5. Catalytic oxidation: It is also used as a catalyst to catalyze oxidation reactions and promote the progress of chemical reactions.