Ammonium Heptamolybdate Tetrahydrate from China

Ammonium heptamolybdate tetrahydrate is a crystalline inorganic salt that serves as a soluble source of molybdenum, commonly used in fertilizers, catalysts, and laboratory reagents. Although it is a molybdate salt, its classification under this tariff item is based on its molybdenum oxide content and the absence of a more specific heading. The product is presented as a separate chemically defined compound, consistent with Chapter 28's scope.