Ammonium molybdate ((NH4)2MoO4) is an inorganic salt, which is widely used as a basic raw material for the production of high-purity molybdenum products, molybdenum catalysts, and molybdenum pigments. Because ammonium molybdate is easy to deliquescence and agglomerates, it needs to be screened when used. The 40-mesh ammonium molybdate is a white, loose crystal without deliquescence,