Ammonium Heptamolybdate Tetrahydrate from Mexico
Crystalline ammonium heptamolybdate tetrahydrate ((NH4)6Mo7O24·4H2O), a soluble source of molybdenum for fertilizers and reagents. While a molybdate salt, pure forms are sometimes associated with HTS 2825.70.00.00 if misclassified as hydroxide-derived; primarily 2841. Used in analytical chemistry.
Duty Rate — Mexico → United States
13.2%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Confirm if truly oxide/hydroxide vs salt to avoid 2841 reclassification; include solubility data in docs
• Pitfall: agricultural use may trigger Chapter 31 scrutiny