Ammonium Metatungstate from Germany
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 — Germany → United States
13.7%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
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