Ammonium Heptamolybdate from Japan
Ammonium heptamolybdate (NH4)6Mo7O24·4H2O is a white crystalline powder used as a precursor in molybdenum metal production and as a catalyst in chemical reactions. It falls under HTS 2841.70.10.00 as it is a molybdate salt of ammonium, specifically an oxometallic acid salt per Chapter 28 notes.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify purity certificate to confirm 'chemically defined' status per Chapter 28 Note 1; ensure SDS includes CAS 12027-67-7
• Common pitfall: mislabeling as fertilizer-grade shifts to Chapter 31