Ammonium paratungstate is an important tungsten salt compound, which can be used to prepare various tungsten compounds, such as potassium tungstate, sodium tungstate, lead tungstate, etc. In addition, it can also be used to prepare other tungsten compounds, such as diethyl tungstate, calcium tungstate, tungsten tungstate, etc. These tungsten compounds are widely used in industry and scientific research fields, such as catalysts, coatings, ceramic materials, etc.