Ammonium Metatungstate from China
Ammonium metatungstate ((NH4)6H2W12O40) is an ammonium salt of a peroxometallic tungstic acid complex, widely used in catalysts and tungsten metal production. Classified under HTS 2841.90.50.00 as 'other' salts of oxo- or peroxometallic acids. It qualifies as chemically defined per Chapter 28/29 notes.
Duty Rate — China → United States
41.2%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Provide detailed chemical assay confirming metatungstate structure to distinguish from simple tungstates in 2841.80
• Check for REACH compliance if transshipping from EU; pitfall is incorrect declaration as 'tungsten compound' leading to wrong heading
• Use UN-approved packaging for powder form to prevent dust hazards during transport